Text preview for : en_4j2_1f.pdf part of Daewoo Nubira/Lacetti Also known as: Chevrolet Nubira / Lacetti, Chevrolet Optra Optra5, Suzuki Forenza Reno Covers the 1.4L, 1.6L and 1.8L engine. Year 2004



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SECTION : 1F

ENGINE CONTROLS
CAUTION : Disconnect the negative battery cable before removing or installing any electrical unit o r w hen a tool or equipment could easily come in contact with exposed electrical terminals. Disconnecting this cable will help prevent personal injury and damage to the vehicle. The ignition must also be in LOCK unless otherwise noted.

TABLE OF CONTENTS
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­6 Engine Data Display Tables . . . . . . . . . . . . . . . . . 1F­6 Engine Data Display Table Definitions . . . . . . . . 1F­7 Fastener Tightening Specifications . . . . . . . . . 1F­10 Fuel System Specifications . . . . . . . . . . . . . . . . . 1F­11 Temperature Vs Resistance . . . . . . . . . . . . . . . . 1F­11 SCHEMATIC AND ROUTING DIAGRAMS . . . . 1F­12 ECM Wiring Diagram (1.4L/1.6L DOHC ­ 1 OF 6) . . . . . . . . . . . . . . 1F­12 ECM Wiring Diagram (1.4L/1.6L DOHC ­ 2 OF 6) . . . . . . . . . . . . . . 1F­13 ECM Wiring Diagram (1.4L/1.6L DOHC ­ 3 OF 6) . . . . . . . . . . . . . . 1F­14 ECM Wiring Diagram (1.4L/1.6L DOHC ­ 4 OF 6) . . . . . . . . . . . . . . 1F­15 ECM Wiring Diagram (1.4L/1.6L DOHC ­ 5 OF 6) . . . . . . . . . . . . . . 1F­16 ECM Wiring Diagram (1.4L/1.6L DOHC ­ 6 OF 6) . . . . . . . . . . . . . . 1F­17 ECM Wiring Diagram (1.8L DOHC ­ 1 OF 6) . 1F­18 ECM Wiring Diagram (1.8L DOHC ­ 2 OF 6) . 1F­19 ECM Wiring Diagram (1.8L DOHC ­ 3 OF 6) . 1F­20 ECM Wiring Diagram (1.8L DOHC ­ 4 OF 6) . 1F­21 ECM Wiring Diagram (1.8L DOHC ­ 5 OF 6) . 1F­22 ECM Wiring Diagram (1.8L DOHC ­ 6 OF 6) . 1F­23 Connector End View . . . . . . . . . . . . . . . . . . . . . . 1F­24 COMPONENT LOCATOR . . . . . . . . . . . . . . . . . . . 1F­28 Component Locator (1.4L/1.6L DOHC) . . . . . . 1F­28 Component Locator (1.8L DOHC) . . . . . . . . . . . 1F­29 DIAGNOSIS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­30 SYSTEM DIAGNOSIS . . . . . . . . . . . . . . . . . . . . . . 1F­30 Diagnostic Aids . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­30 Idle Learn Procedure . . . . . . . . . . . . . . . . . . . . . . 1F­30 TEC (Tooth Error Correction) Learn Procedure 1F­31 ON­Board Diagnostic (EOBD) System Check (1.4L/1.6L DOHC) . . . . . . . . . . . . . . . . . . . . . . . 1F­32 ON­Board Diagnostic (EOBD) System Check (1.8L DOHC) . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­34 Multiple ECM Informationn Sensor Dtcs Set . . 1F­36 Engine Cranks But Will Not Run (1.4L/1.6L DOHC) . . . . . . . . . . . . . . . . . . . . . . . 1F­40 Engine Cranks But Will Not Run (1.8L DOHC) 1F­47 No Malfunction Indicator Lamp ( 1.4L/1.6L DOHC) . . . . . . . . . . . . . . . . . . . . . . . 1F­54 No Malfunction Indicator Lamp (1.8L DOHC) . 1F­56 Malfunction Indicator Lamp On Steady (1.4L/1.6L DOHC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­58 Malfunction Indicator Lamp On Steady (1.8L DOHC) . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­60 Fuel System Diagnosis . . . . . . . . . . . . . . . . . . . . 1F­62 Fuel Pump Relay Circuit Check (1.4L/1.6L DOHC) . . . . . . . . . . . . . . . . . . . . . . . 1F­65 Fuel Pump Relay Circuit Check (1.8L DOHC) . 1F­68 Main Relay Circuit Check (1.4L/1.6L DOHC) . 1F­71 Main Relay Circuit Check (1.8L DOHC) . . . . . . 1F­73 Manifold Absolute Pressure Check (1.4L/1.6L DOHC) . . . . . . . . . . . . . . . . . . . . . . . 1F­75 Manifold Absolute Pressure Check (1.8L DOHC) . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­77 Idle Air Control System Check (1.4L/1.6L DOHC) . . . . . . . . . . . . . . . . . . . . . . . 1F­79 Idle Air Control System Check (1.8L DOHC) . . 1F­82 Ignition System Check (1.4L/1.6L DOHC) . . . . 1F­85 Ignition System Check (1.8L DOHC) . . . . . . . . 1F­88 Engine Cooling Fan Circuit Check ­ Dual Fan (1.4L/1.6L DOHC) . . . . . . . . . . . . . . . . . . . . . . . 1F­93 Engine Cooling Fan Circuit Check ­ Dual Fan (1.8L DOHC) . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­100 Data Link Connector Diagnosis (1.4L/1.6L DOHC) . . . . . . . . . . . . . . . . . . . . . . 1F­106 Data Link Connector Diagnosis (1.8L DOHC) 1F­108 Fuel Injector Balance Test . . . . . . . . . . . . . . . . 1F­110

1F ­ 2IENGINE CONTROLS
TROUBLE CODE DIAGNOSIS (1.4L/1.6L DOHC) . . . . . . . . . . . . . . . . . . . . . . . . 1F­111 Clearing Trouble Codes . . . . . . . . . . . . . . . . . . . . 1F­111 Diagnostic Trouble Codes (1.4L/1.6L DOHC) . 1F­111 DTC P0107 Manifold Absolute Pressure Sensor Low Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­114 DTC P0108 Manifold Absolute Pressure Sensor High Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­117 DTC P0112 Intake Air Temperature Sensor Low Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­120 DTC P0113 Intake Air Temperature Sensor High Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­122 DTC P0117 Engine Coolant Temperature Sensor Low Voltage . . . . . . . . . . . . . . . . . . . . 1F­125 DTC P0118 Engine Coolant Temperature Sensor High Voltage . . . . . . . . . . . . . . . . . . . . 1F­128 DTC P0122 Throttle Position Sensor Low Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­131 DTC P0123 Throttle Position Sensor High Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­134 DTC P0131 Front Heated Oxygen Sensor Low Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­137 DTC P0132 Front Heated Oxygen Sensor High Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­140 DTC P0133 Front Heated Oxygen Sensor No Activity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­142 DTC P0135 Front Heated Oxygen Sensor Heater Circuit Not Functioning . . . . . . . . . . . . . . . . . . 1F­145 DTC P0137 Rear Heated Oxygen Sensor Low Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­148 DTC P0138 Rear Heated Oxygen Sensor High Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­151 DTC P0140 Rear Heated Oxygen Sensor No Activity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­153 DTC P0141 Rear Heated Oxygen Sensor Heater Malfunction . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­156 DTC P0171 Fuel Trim System Too Lean . . . . 1F­158 DTC P0172 Fuel Trim System Too Rich . . . . . 1F­162 DTC P0222 Main Throttle Idle Actuator (MTIA) Low Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­165 DTC P0223 Main Throttle Idle Actuator (MTIA) High Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­168 DTC P0261 Injector 1 Low Voltage . . . . . . . . . 1F­171 DTC P0262 Injector 1 High Voltage . . . . . . . . 1F­173 DTC P0264 Injector 2 Low Voltage . . . . . . . . . 1F­175 DTC P0265 Injector 2 High Voltage . . . . . . . . 1F­177 DTC P0267 Injector 3 Low Voltage . . . . . . . . . 1F­179 DTC P0268 Injector 3 High Voltage . . . . . . . . 1F­181 DTC P0270 Injector 4 Low Voltage . . . . . . . . . 1F­183 DTC P0271 Injector 4 High Voltage . . . . . . . . 1F­185 DTC P0300 Multiple Cylinder Misfire(Catalyst Damage) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­188 DTC P0300 Multiple Cylinder Misfire(Increase Emission) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­192 DTC P0327 Knock Sensor Circuit Fault (1.4L DOHC) . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­195 DTC P0327 Knock Sensor Circuit Fault (1.6L DOHC) . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­198 DTC P0335 Magnetic Crankshaft Position Sensor Electrical Error . . . . . . . . . . . . . . . . . . 1F­201 DTC P0336 58X Crankshaft Position Sensor No Plausible Signal . . . . . . . . . . . . . . . . . . . . 1F­204 DTC P0337 58X Crankshaft Position Sensor No Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­207 DTC P0341 Camshaft Position Sensor Rationality . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­210 DTC P0342 Camshaft Position Sensor Signal 1F­212 DTC P0351 Ignition Signal Coil A Fault . . . . . 1F­214 DTC P0352 Ignition Signal Coil B Fault . . . . . 1F­216 DTC P0400 Exhaust Gas Recirculation Out Of Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­218 DTC P0404 Exhaust Gas Recirculation Opened . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­221 DTC P0405 EGR Pintle Position Sensor Low Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­224 DTC P0406 EGR Pintle Position Sensor High Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­227 DTC P0420 Catalyst Low Efficiency . . . . . . . . 1F­230 DTC P0444 EVAP Purge Control Circuit No Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­232 DTC P0445 EVAP Purge Control Circuit Fault 1F­235 DTC P0462 Fuel Level Sensor Low Voltage (1.6L DOHC Only) . . . . . . . . . . . . . . . . . . . . . 1F­238 DTC P0463 Fuel Level Sensor High Voltage (1.6L DOHC Only) . . . . . . . . . . . . . . . . . . . . . 1F­241 DTC P0480 Low Speed Cooling Fan Relay Circuit Fault (1.4L DOHC) . . . . . . . . . . . . . . . 1F­245 DTC P0480 Low Speed Cooling Fan Relay Circuit Fault (1.6L DOHC) . . . . . . . . . . . . . . . 1F­248 DTC P0481 High Speed Cooling Fan Relay Circuit Fault (1.4L DOHC) . . . . . . . . . . . . . . . 1F­251 DTC P0481 High Speed Cooling Fan Relay Circuit Fault (1.6L DOHC) . . . . . . . . . . . . . . . 1F­254 DTC P0501 Vehicle Speed No Signal (M/T Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­257 DTC P0510 Throttle Position Switch Circuit Fault (1.4L DOHC) . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­260 DTC P0510 Throttle Position Switch Circuit Fault (1.6L DOHC) . . . . . . . . . . . . . . . . . . . . . 1F­262 DTC P0532 A/C Pressure Sensor Low Voltage1F­264 DTC P0533 A/C Pressure Sensor High Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­267
DAEWOO V­121 BL4

ENGINE CONTROLS 1F ­ 3
DTC P0562 System Voltage(Engine Side) Too Low . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­270 DTC P0563 System Voltage(Engine Side) Too High . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­272 DTC P0601 Engine Control Module Checksum Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­274 DTC P0604 Engine Control Module Internal/External RAM Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­275 DTC P0605 Engine Control Module INMVY Write Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­276 DTC P0656 Fuel Level Gauge Circuit Fault . . 1F­277 DTC P1181 Variable Intake Manifold Solenoid Low Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­279 DTC P1182 Variable Intake Manifold Solenoid High Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­281 DTC P1230 Fuel Pump Relay Low Voltage (1.4L DOHC) . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­283 DTC P1230 Fuel Pump Relay Low Voltage (1.6L DOHC) . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­286 DTC P1231 Fuel Pump Relay High Voltage (1.4L DOHC) . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­289 DTC P1231 Fuel Pump Relay High Voltage (1.6L DOHC) . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­292 DTC P1320 Crankshaft Segment Period Segment Adaptation At Limit . . . . . . . . . . . . 1F­295 DTC P1321 Crankshaft Segment Period Tooth Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­297 DTC P1382 Rough Road Data Invalid (NON ABS) . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­299 DTC P1382 Rough Road Data Invalid (ABS) 1F­302 DTC P1385 Rough Road Sensor Circuit Fault (NON ABS) . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­305 DTC P1402 Exhaust Gas Recirculation Blocked . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­308 DTC P1403 Exhaust Gas Recirculation Valve Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­310 DTC P1404 Exhaust Gas Recirculation Closed1F­313 DTC P1511 Idle Charge Actuator Circuit Fault 1F­316 DTC P1512 Idle Charge Actuator Mechanical Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­319 DTC P1513 Idle Charge Actuator Functional Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­321 DTC P1537 A/C Compressor Relay High Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­324 DTC P1538 A/C Compressor Relay Low Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­326 DTC P1610 Main Relay High Voltage (1.4L DOCH) . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­328 DTC P1610 Main Relay High Voltage (1.6L DOHC) . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­330 DTC P1611 Main Relay Low Voltage (1.4L DOHC) . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­332
DAEWOO V­121 BL4

DTC P1611 Main Relay Low Voltage (1.6L DOHC) . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­334 DTC P1628 Immobilizer No Successful Communication . . . . . . . . . . . . . . . . . . . . . . . . 1F­336 DTC P1629 Immobilizer Wrong Computation 1F­338 DTC P1660 Malfunction Indicator Lamp (MIL) High Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­340 DTC P1661 Malfunction Indicator Lamp (MIL) Low Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­342 TROUBLE CODE DIAGNOSIS (1.8L DOHC) . 1F­344 Clearing Trouble Codes . . . . . . . . . . . . . . . . . . . 1F­344 Diagnostic Trouble Codes (1.8L DOHC) . . . . 1F­344 DTC P0106 Manifold Absolute Pressure Rationality . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­347 DTC P0107 Manifold Absolut Pressure Low Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­349 DTC P0108 Manifold Absolut Pressure High Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­352 DTC P0112 Intake Air Temperature Low Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­355 DTC P0113 Intake Air Temperature High Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­358 DTC P0117 Engine Coolant Temperature Low Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­361 DTC P0118 Engine Coolant Temperature High Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­363 DTC P0122 Throttle Position Sensor Low Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­366 DTC P0123 Throttle Position Sensor High Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­369 DTC P0131 Front Heated Oxygen Sensor (HO2S1) Low Voltage . . . . . . . . . . . . . . . . . . 1F­372 DTC P0132 Front Heated Oxygen Sensor (HO2S1) High Voltage . . . . . . . . . . . . . . . . . . 1F­375 DTC P0133 Front Heated Oxygen Sensor (HO2S1) Slow Response . . . . . . . . . . . . . . . 1F­378 DTC P0134 Front Heated Oxygen Sensor (HO2S1) No Activity or Open . . . . . . . . . . . . 1F­382 DTC P0135 Front Heated Oxygen Sensor (HO2S1) Heater Circuit Not Functioning . . . 1F­385 DTC P0137 Rear Heated Oxygen Sensor (HO2S2) Low Voltage . . . . . . . . . . . . . . . . . . 1F­388 DTC P0138 Rear Heated Oxygen Sensor (HO2S2) High Voltage . . . . . . . . . . . . . . . . . . 1F­391 DTC P0140 Rear Heated Oxygen Sensor (HO2S2) No Activity or Open . . . . . . . . . . . . 1F­394 DTC P0141 Rear Heated Oxygen Sensor (HO2S2) Heater Circuit Not Functioning . . . 1F­397 DTC P0171 Fuel Trim System Too Lean . . . . 1F­400 DTC P0172 Fuel Trim System Too Rich . . . . . 1F­404 DTC P0201 Injector 1 Circuit Fault . . . . . . . . . 1F­408 DTC P0202 Injector 2 Circuit Fault . . . . . . . . . 1F­411

1F ­ 4IENGINE CONTROLS
DTC P0203 Injector 3 Circuit Fault . . . . . . . . . 1F­414 DTC P0204 Injector 4 Circuit Fault . . . . . . . . . 1F­417 DTC P0300 Multiple Cylinder Misfire Detected 1F­421 DTC P0301 Cylinder 1 Misfire . . . . . . . . . . . . . 1F­426 DTC P0302 Cylinder 2 Misfire . . . . . . . . . . . . . 1F­431 DTC P0303 Cylinder 3 Misfire . . . . . . . . . . . . . 1F­436 DTC P0304 Cylinder 4 Misfire . . . . . . . . . . . . . 1F­441 DTC P0317 Rough Road Sensor Source Not Detected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­445 DTC P0325 Knock Sensor Internal Malfunction . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­447 DTC P0327 Knock Sensor Circuit Fault . . . . . 1F­449 DTC P0336 58X Crank Position Extra/Missing Pulses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­452 DTC P0337 58X Crank Position Sensor No Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­455 DTC P0341 Camshaft Position Sensor Rationality . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­458 DTC P0342 Camshaft Position Sensor No Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­461 DTC P0351 Ignition Control Circuit A Fault (Cylinder 1 and 4) . . . . . . . . . . . . . . . . . . . . . . 1F­464 DTC P0352 Ignition Control Circuit B Fault (Cylinder 2 and 3) . . . . . . . . . . . . . . . . . . . . . . 1F­466 DTC P0401 Exhaust Gas Recirculation Insufficient Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­468 DTC P0402 Exhaust Gas Recirculation Excessive Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­470 DTC P0404 Exhaust Gas Recirculation Open Valve Position Error . . . . . . . . . . . . . . . . . . . . 1F­474 DTC P0405 Exhaust Gas Recirculation Pintle Position Low Voltage . . . . . . . . . . . . . . . . . . . 1F­478 DTC P0406 Exhaust Gas Recirculation Pintle Position High Voltage . . . . . . . . . . . . . . . . . . . 1F­481 DTC P0420 Catalyst Oxygen Sensor Low Efficiency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­484 DTC P0443 Evaporative Emission System Purge Solenoid Control Circuit . . . . . . . . . . . . . . . . . 1F­486 DTC P0461 Fuel Level Struck . . . . . . . . . . . . . 1F­489 DTC P0462 Fuel Level Low Voltage . . . . . . . . 1F­492 DTC P0463 Fuel Level High Voltage . . . . . . . 1F­495 DTC P0502 Vehicle Speed Sensor No Signal (Engine Side) . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­498 DTC P0506 Idle Speed RPM Lower Than Desired Idle Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­501 DTC P0507 Idle Speed RPM Higher Than Desired Idle Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­504 DTC P0532 A/C Pressure Sensor Low Voltage1F­507 DTC P0533 A/C Pressure Sensor High Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­510 DTC P0562 System Voltage Too Low (Engine Side) . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­513 DTC P0563 System Voltage Too High (Engine Side) . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­515 DTC P0601 ECM Checksum Fault (Engine Side) . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­517 DTC P0602 ECM Reprogrom Error . . . . . . . . 1F­518 DTC P0607 Lower Power Counter Error . . . . 1F­519 DTC P0700 Transaxle Control Module Malfunction . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­520 DTC P1106 Manifold Abosolute Pressure Intermittent High Voltage . . . . . . . . . . . . . . . . 1F­522 DTC P1107 Manifold Abosolute Pressure Intermittent Low Voltage . . . . . . . . . . . . . . . . 1F­524 DTC P1111 Intake Air Temperature Intermittent High Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­526 DTC P1112 Intake Air Temperature Intermittent Low Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­529 DTC P1114 Engine Coolant Temperature Intermittent Low Voltage . . . . . . . . . . . . . . . . 1F­531 DTC P1115 Engine Coolant Temperature Intermittent High Voltage . . . . . . . . . . . . . . . . 1F­533 DTC P1121 Throttle Position Sensor Intermittent High Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­535 DTC P1122 Throttle Position Sensor Intermittent Low Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­537 DTC P1133 Front Heated Oxyzen Sensor (HO2S1) Too Few Transitions . . . . . . . . . . . 1F­539 DTC P1134 Front Heated Oxyzen Sensor (HO2S1) Transitions Ratio . . . . . . . . . . . . . . 1F­543 DTC P1167 Front Heated Oxyzen Sensor (HO2S1) Rich in Decel Fuel Cutoff (DFCO) 1F­546 DTC P1171 Fuel Trim System Lean During Power Enrichment . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­548 DTC P1336 58X Crank Position Tooth Error Not Learned . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­550 DTC P1391 G Sensor Rough Road Rationality 1F­552 DTC P1392 G Sensor Rough Low Voltage . . 1F­555 DTC P1393 G Sensor Rough High Voltage . . 1F­558 DTC P1396 ABS WSS Signal Variation . . . . . 1F­561 DTC P1397 ABS WSS No Signal . . . . . . . . . . 1F­563 DTC P1404 Exhaust Gas Recirculation Closed Valve Pintle Error . . . . . . . . . . . . . . . . . . . . . . 1F­565 DTC P1601 SPI Communications Between ECM and TCM . . . . . . . . . . . . . . . . . . . . . . . . 1F­568 DTC P1607 Lower Power Counter Reset . . . 1F­569 DTC P1626 Immobilizer No Response . . . . . . 1F­570 DTC P1631 Immobilizer Invalid Response . . 1F­571 DTC P1650 SPI Communications Between Error with SIDM Chip . . . . . . . . . . . . . . . . . . . . . . . . 1F­572 DTC P1655 SPI Communications Between Error with PSVI Chip . . . . . . . . . . . . . . . . . . . . . . . . 1F­573
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ENGINE CONTROLS 1F ­ 5
SYMPTOM DIAGNOSIS . . . . . . . . . . . . . . . . . . . 1F­574 Important Preliminary Checks . . . . . . . . . . . . . 1F­574 Intermittents . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­574 Hard Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­576 Surges or Chuggles . . . . . . . . . . . . . . . . . . . . . . 1F­579 Lack of Power, Sluggishness, or Sponginess 1F­581 Hesitation, Sag, Stumble . . . . . . . . . . . . . . . . . 1F­583 Cuts Out, Misses . . . . . . . . . . . . . . . . . . . . . . . . 1F­584 Poor Fuel Economy . . . . . . . . . . . . . . . . . . . . . . 1F­587 Rough, Unstable, or Incorrect Idle, Stalling . . 1F­588 Excessive Exhaust Emissions or Odors . . . . . 1F­591 Dieseling, Run­On . . . . . . . . . . . . . . . . . . . . . . . 1F­592 Backfire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­593 MAINTENANCE AND REPAIR . . . . . . . . . . . . . 1F­594 ON­VEHICLE SERVICE . . . . . . . . . . . . . . . . . . . 1F­594 Fuel System Pressure Relief . . . . . . . . . . . . . . 1F­594 Fuel Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­594 Fuel Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­596 Fuel Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­597 Fuel Rail and Injectors (1.4L/1.6L DOHC) . . . 1F­598 Fuel Rail and Injectors (1.8L DOHC) . . . . . . . 1F­600 Engine Coolant Temperature Sensor (1.4L/1.6L DOHC) . . . . . . . . . . . . . . . . . . . . . . 1F­602 Engine Coolant Temperature Sensor (1.8L DOHC) . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­602 Throttle Position Sensor (1.8L DOHC) . . . . . . 1F­603 Throttle Body (1.4L/1.6L DOHC) . . . . . . . . . . . 1F­603 Throttle Body (1.8L DOHC) . . . . . . . . . . . . . . . 1F­604 Front Heated Oxygen Sensor (HO2S 1) (1.4L/1.6L DOHC) . . . . . . . . . . . . . . . . . . . . . . 1F­606 Front Heated Oxygen Sensor (HO2S 1) (1.8L DOHC) . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­607 Rear Heated Oxygen Sensor (HO2S 2) . . . . . 1F­607 Intake Air Temperature Sensor (1.4L/1.6L DOHC) . . . . . . . . . . . . . . . . . . . . . . 1F­608 Intake Air Temperature Sensor (1.8L DOHC) 1F­609 Idle Air Control Valve (1.8L DOHC) . . . . . . . . . 1F­609 Manifold Absolute Pressure Sensor (1.4L/1.6L DOHC) . . . . . . . . . . . . . . . . . . . . . . 1F­610 Manifold Absolute Pressure Sensor (1.8L DOHC) . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­611 Exhaust Gas Recirculation Valve (1.4L/1.6L DOHC) . . . . . . . . . . . . . . . . . . . . . . 1F­611 Exhaust Gas Recirculation Valve (1.8L DOHC)1F­612 Knock Sensor (1.4L/1.6L DOHC) . . . . . . . . . . 1F­612 Knock Sensor (1.8L DOHC) . . . . . . . . . . . . . . . 1F­613 Evaporative Emission Canister . . . . . . . . . . . . 1F­614
DAEWOO V­121 BL4

Evaporative Emission Canister Purge Solenoid Valve 1 F­615 Crankshaft Position (CKP) Sensor (1.4L/1.6L DOHC) . . . . . . . . . . . . . . . . . . . . . . 1F­615 Crankshaft Position (CKP) Sensor (1.8L DOHC) . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­616 Camshaft Position Sensor (1.4L/1.6L DOHC) 1F­618 Camshaft Position Sensor (1.8L DOHC) . . . . 1F­619 Engine Control Module (1.4L/1.6L DOHC) . . . 1F­620 Engine Control Module (1.8L DOHC) . . . . . . . 1F­621 Electronic Ignition System Ignition Coil (1.4L/1.6L DOHC) . . . . . . . . . . . . . . . . . . . . . . 1F­621 Electronic Ignition System Ignition Coil (1.8L DOHC) . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­622 GENERAL DESCRIPTION AND SYSTEM OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­623 Ignition System Operation . . . . . . . . . . . . . . . . 1F­623 Electronic Ignition System Ignition Coil . . . . . . 1F­623 Crankshaft Position Sensor . . . . . . . . . . . . . . . 1F­623 Camshaft Position Sensor . . . . . . . . . . . . . . . . 1F­623 Idle Air System Operation . . . . . . . . . . . . . . . . . 1F­623 Fuel Control System Operation . . . . . . . . . . . . 1F­623 Evaporative Emission Control System Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­624 Evaporative Emission Canister . . . . . . . . . . . . 1F­625 Positive Crankcase Ventilation System Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­625 Engine Coolant Temperature Sensor . . . . . . . 1F­625 Throttle Position Sensor . . . . . . . . . . . . . . . . . . 1F­625 Catalyst Monitor Oxygen Sensors . . . . . . . . . . 1F­625 Exhaust Gas Recirculation Valve . . . . . . . . . . . 1F­626 Intake Air Temperature Sensor . . . . . . . . . . . . 1F­626 Idle Air Control Valve . . . . . . . . . . . . . . . . . . . . . 1F­626 Manifold Absolute Pressure Sensor . . . . . . . . 1F­626 Engine Control Module . . . . . . . . . . . . . . . . . . . 1F­627 Fuel Injector . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­627 Knock Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­627 Rough Road Sensor . . . . . . . . . . . . . . . . . . . . . 1F­627 Strategy­Based Diagnostics . . . . . . . . . . . . . . 1F­628 EOBD Serviceability Issues . . . . . . . . . . . . . . . 1F­628 Serial Data Communications . . . . . . . . . . . . . . 1F­629 On­Board Diagnostic (EOBD) . . . . . . . . . . . . . 1F­629 Comprehensive Component Monitor Diagnostic Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1F­630 Common EOBD Terms . . . . . . . . . . . . . . . . . . . 1F­630 Reading Diagnostic Trouble Codes . . . . . . . . . 1F­632 Primary System­Based Diagnostics . . . . . . . . 1F­633

1F ­ 6IENGINE CONTROLS

SPECIFICATIONS
ENGINE DATA DISPLAY TABLES
Engine Data Display Parameter Desired Idle Speed Engine RPM MAP Throttle Position Volt Start­up IAT Intake Air Temperature Coolant Temperature (Start­up) Engine Coolant Temperature IAC Motor Position O2 Sensor (B1­S1) O2 Sensor (B1­S2) Fuel System Status Rich/Lean (B1­S1) Lean to Rich Average Rich to Lean Average Engine Load Value Short Term Fuel Trim Long Term Fuel Trim Linear EGR Feedback EGR Duty Cycle EGR EWMA Result Spark Advance MIL Odometer MIL On Time Base Injection PWM Barometric Pressure Ignition Voltage Air/Fuel Ratio Calculated Air Flow Total Misfire (Current) Misfire History Cyl. 1 Misfire History Cyl. 2 Misfire History Cyl. 3 Misfire History Cyl. 4 Vehicle Speed A/C Pressure Scaling RPM RPM kPa V °C °C °C °C ­ mV mV Closed Loop/Open Loop Rich/Lean mS mS % % % V % ­ ° Km Min mS kPa V Ratio G/S ­ ­ ­ ­ ­ Km/H V Value ECM idle command (varies with temperature) ± 50 RPM from desired RPM in drive (A/T) ± 50 RPM from desired RPM in neutral (M/T) 29 ­ 55 (varies with manifold and barometric pressure) 0v varies 10 ­ 90 °C varies 85 ­ 105 °C 1 ­ 50 1­1000 mV (varies continuously) 1­1000 mV (varies continuously) "Closed Loop" (may enter "Open Loop" at extended idle) varies 10 ­211 ms or 0 ms 10 ­211 ms or 0 ms 0 ­ 100 % (varies) ­30 ­ 30% ­30 ­ 30% varies 0% <=0 varies 0 Km 0 Min 1.0 ­ 5.0 ms varies with altitude 13.5 ­ 14.8 V 14.6 (Closed Loop Enable) varies 0 0 0 0 0 0 Km/H varies
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ENGINE CONTROLS 1F ­ 7
Parameter A/C Request A/C Clutch Fuel Pump Command Closed Loop Throttle At Idle O2 Ready (B1­S1) Knock Present Fan Low Fan High TCC Engaged (Only AT) Park/Neutral (Only AT) Fuel Level Input Fuel Level Output Fuel Trim Cell G­Sensor Engine Runtime Scaling Yes/No On/Off On/Off Yes/No Yes/No Yes/No Yes/No On/Off On/Off Yes/No P/N and R/N/D V % ­ V HH:MM:SS Value No Off On Yes No Yes No On/Off On/Off Yes P/N varies varies 18 1.1 ­ 3.7 V (Non­ABS Only) Hours:Minutes:Seconds

* Condition: Warmed up, idle, park or neutral, A/C off

ENGINE DATA DISPLAY TABLE DEFINITIONS
ECM Data Description The following information will assist in diagnosing emission or driveability problems. A first technician can view the displays while the vehicle is being driven by second technician. Refer to Powertrain On­Board Diagnostic (EOBD) System Check for addition information. A/C Clutch The A/C Relay represents the commanded state of the A/C clutch control relay. The A/C clutch should be engaged when the scan tool displays ON. A/C Pressure The A/C High Side displays the pressure value of the A/C refrigerant pressure sensor. The A/C High Side helps to diagnose the diagnostic trouble code (DTC) P0533. A/C Request The A/C Request represents whether the air conditioning is being requested from the HVAC selector. The input is received by the instrument panel cluster and then sent serial data to the ECM and finally to the scan tool over KWP 2000 serial data. Air Fuel Ratio The Air Fuel Ration indicates the air to fuel ratio based on the Front Heated Oxygen Sensor (HO2S1) inputs. The ECM uses the fuel trims to adjust fueling in order to attempt to maintain an air fuel ratio of 14.7:1.
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BARO The Barometric Pressure (BARO) sensor measures the change in the intake manifold pressure which results from altitude changes. This value is updated at ignition ON and also at Wide Open Throttle (WOT). Base Injection PWM Indicates the base Pulse Width Modulation (PWM) or ON time of the indicated cylinder injector in milliseconds. When the engine load is increased, the injector pulse width will increase. Calculated Air Flow The calculated air flow is a calculation based on manifold absolute pressure. The calculation is used in several diagnostics to determine when to run the diagnostics. Desired Idle Speed The ECM commands the idle speed. The ECM compensates for various engine loads in order to maintain the desired idle speed. The actual engine speed should remain close to the desired idle under the various engine loads with the engine idling. Engine Coolant Temperature The Engine Coolant Temperature (ECT) sensor sends engine temperature information to the ECM. The ECM supplies 5 volts to the engine coolant temperature sensor circuit. The sensor is a thermistor which changes internal resistance as temperature changes. When the sensor is cold (internal resistance high), the ECM monitors a high voltage which it interprets as a cold engine. As the sensor warms (internal resistance decreases), the voltage signal will decrease and the ECM will interpret the lower voltage as a warm engine.

1F ­ 8IENGINE CONTROLS
EGR Desired Position The desired exhaust gas recirculation (EGR) position is the commanded EGR position. The ECM calculates the desired EGR position. The higher the percentage, the longer the ECM is commanding the EGR valve ON. Engine Load Indicates engine load based on manifold absolute pressure. The higher the percentage, the more load the engine is under. Engine Run Time The engine run time is a measure of how long the engine has been running. When the engine stops running, the timer resets to zero. Engine Speed Engine Speed is computed by the ECM from the fuel control reference input. It should remain close to desired idle under the various engine loads with the engine idling. Fan The Fan Control (FC) Relay is commanded by the ECM. The FC Relay displays the command as ON or OFF. Fuel Level Sensor The Fuel Level Sensor monitors the fuel level in the tank. The Fuel Level Sensor monitors the rate of change of the air pressure in the EVAP system. Several of the Enhanced EVAP System diagnostics are dependent upon the correct fuel level. Fuel System Status The Closed Loop is displayed indicating that the ECM is controlling the fuel delivery according to the Front Heated Oxygen Sensor (HO2S1) voltage as close to an air/fuel ratio of 14.7 to 1 as possible. IAC Position The scan tool displays the ECM command for the Idle Air Control (IAC) pintle position in counts. The higher the number of counts, the greater the commanded idle speed reads. The Idle Air Control responds to changes in the engine load in order to maintain the desired idle rpm. Ignition 1 (Voltage) The ignition volts represent the system voltage measured by the ECM at the ignition feed circuit. Intake Air Temperature The ECM converts the resistance of the Intake Air Temperature (IAT) sensor to degrees in the same manner as the engine coolant temperature (ECT) sensor. In take air temperature is used by the ECM to adjust fuel delivery and spark timing according to incoming air density. Knock Present The KS Noise Channel indicates when the ECM detects the KS signal. The ECM should display NO at idle. Long Term FT The Long Term Fuel Trim (FT) is derived from the short term fuel trim value. The Long Term FT is used for the long term correction of the fuel delivery. A value of 128 counts (0%) indicates that the fuel delivery requires no compensation in order to maintain a 14.7:1 air to fuel ratio. A value below 128 counts means that the fuel system is too rich and the fuel delivery is being reduced. The ECM is decreasing the injector pulse width. A value above 128 counts indicates that a lean condition exists for which the ECM is compensating. MAP The Manifold Absolute Pressure (MAP) sensor measures the change in the intake manifold pressure which results from engine load and speed changes. As the intake manifold pressure increases, the air density in the intake also increases and the additional fuel is required. Misfire History #1­4 Indicates the number of misfires that have occurred after 195 current misfires have been counted. The current misfire counter will add its misfires to the history misfire counter after 195 total misfires have taken place. If 1 cylinder is misfiring, the misfiring current counter will have 195 misfires counted before adding to its history counter. If 2 cylinders are misfiring, the misfiring current counter will add to their history counters after 97 misfires. The counter increments only after a misfire diagnostic trouble code (DTC) has been set. Front Heated Oxygen Sensor The pre­converter Front Heated Oxygen Sensor (HO2S1) reading represents the exhaust oxygen sensor output voltage. This voltage will fluctuate constantly between 100 mv (lean exhaust) and 900 mv (rich exhaust) when the system is operating in a Closed Loop. Rear Heated Oxygen Sensor The post­converter Rear Heated Oxygen Sensor (HO2S2) represents the exhaust oxygen output voltage past the catalytic converter. This voltage remains inactive, or the voltage will appear lazy within a range of 100 mv (lean exhaust) and 900 mv (rich exhaust) when operating in a Closed Loop. Short Term FT The Short Term FT represents a short term correction to fuel delivery by the ECM in response to the amount of time the oxygen sensor voltage spends above or below the 450 mv threshold. If the oxygen sensor has mainly been below 450 mv, indicating a lean air/fuel mixture, short term fuel trim will increase to tell the ECM to add fuel. If the oxygen sensor voltage stays mainly above the threshold, the ECM will reduce fuel delivery to compensate for the indicated rich condition.
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ENGINE CONTROLS 1F ­ 9
Spark Advance This is a display of the spark advance Ignition Coil (IC) calculation which the ECM is programming in the ignition system. It computes the desired spark advance using data such as engine temperature, rpm, engine load, vehicle speed and operating mode. TCC Engaged When the brake pedal is applied, the Torque Converter Clutch (TCC) brake switch sends a signal to the ECM to disengage the TCC and disable the cruise control. Total Misfire Current Counter Indicates the total number of misfires that have been deVehicle Speed The vehicle speed sensor signal is converted into mph or km/h for display. The vehicle speed output from the ECM is 4000 pulses per mile. The scan tool uses the KWP 2000 serial data from the ECM to obtain vehicle speed, while the Instrument Panel Cluster (IPC), cruise control module and the chime alarm module use the 4000 ppm output. tected in all the cylinders after 100 engine cycles. One cycle equals one complete 4 stroke cycle. The total misfire only increments during the steady state cruise conditions. TP Sensor The ECM uses the TP Sensor in order to determine the amount of the throttle demanded by the vehicle's operator. The TP Sensor reads between 0.36­0.96 volts at idle to above 4 volts at WOT.

DAEWOO V­121 BL4

1F ­ 10IENGINE CONTROLS

FASTENER TIGHTENING SPECIFICATIONS
Application Camshaft Position Sensor Bolts (1.4L/1.6L DOHC) Camshaft Position Sensor Bolts (1.8 DOHC) Crankshaft Position Sensor Retaining Bolt (1.4L/1.6L DOHC) Crankshaft Position Sensor Retaining Bolt (1.8 DOHC) Electronic Ignition System Ignition Coil Retaining Bolts Exhaust Gas Recirculation Valve Retaining Bolts Engine Control Module Bolts Engine Coolant Temperature Sensor Bolt (1.4L/1.6L DOHC) Engine Coolant Temperature Sensor Bolt (1.8 DOHC) Evaporative Emission Canister Flange Bolt Evaporative Emission Canister Purge Solenoid Bracket Bolt Fuel Filter Mounting Bracket Assembly Bolt Fuel Tank Retaining Bolts Fuel Rail Retaining Bolts Idle Air Control Valve Retaining Bolts (1.8 DOHC) Intake Air Temperature Sensor Knock Sensor Bolt Manifold Absolute Pressure Sensor Bolts (1.4L/1.6L DOHC) Manifold Absolute Pressure Sensor Bolts (1.8 DOHC) Oxygen Sensor Bolt Throttle Body Retaining Nuts (1.4L/1.6L DOHC) Throttle Body Retaining Nuts (1.8 DOHC) Throttle Position Sensor Retaining Bolts (1.8 DOHC) NSm 7 8 6.5 8 10 30 12 17.5 20 4 5 4 20 25 3 22 20 8 4 42 15 10 2 Lb­Ft ­ ­ ­ ­ ­ 22 ­ 13 15 ­ ­ ­ 15 18 ­ 16 15 ­ ­ 31 11 ­ ­ Lb­In 62 71 58 71 89 ­ 106 ­ ­ 35 44 35 ­ ­ 27 ­ ­ 71 35 ­ ­ 89 18

DAEWOO V­121 BL4

ENGINE CONTROLS 1F ­ 11

FUEL SYSTEM SPECIFICATIONS
Gasoline All engines are designed to use unleaded fuel only. Unleaded fuel must be used for proper emission control system operation. Its use will also minimize spark plug fouling and extend engine oil life. Using leaded fuel can damage the emission warranty coverage. The fuel should meet specification ASTM D4814 for the U.S. or CGSB 3.5 M93 for Canada. All engines are designed to use unleaded fuel with a minimum U(R+M)/2e (pump) octane number of 87, where R=research octane number, and M=motor octane number. Ethanol You may use fuel containing ethanol (ethyl alcohol) or grain alcohol providing that there is no more than 10 percent ethyl alcohol by volume. Methanol Do not use fuels containing methanol. Methanol can corrode metal parts and cause damage to plastic and rubber parts in the fuel system. Methyl Tertiary­Butyl Ether (MTBE) You may use fuel containing Methyl Tertiary­Butyl Ether (MTBE) providing there is no more than 15 percent MTBE by volume.

TEMPERATURE VS RESISTANCE
°C °F ECT Sensor OHMS Temperature vs Resistance Values (Approximate) 100 90 80 70 60 50 45 40 35 30 25 20 15 10 5 0 ­5 ­10 ­15 ­20 ­30 ­40 212 194 176 158 140 122 113 104 95 86 77 68 59 50 41 32 23 14 5 ­4 ­22 ­40 177 241 332 467 667 973 1188 1459 1802 2238 2796 3520 4450 5670 7280 9420 12300 16180 21450 28680 52700 100700 187 246 327 441 603 837 991 1180 1412 1700 2055 2500 3055 3760 4651 5800 7273 9200 9200 15080 25600 45300 IAT Sensor

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1F ­ 12IENGINE CONTROLS

SCHEMATIC AND ROUTING DIAGRAMS
ECM WIRING DIAGRAM (1.4L/1.6L DOHC ­ 1 OF 6)

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ENGINE CONTROLS 1F ­ 13

ECM WIRING DIAGRAM (1.4L/1.6L DOHC ­ 2 OF 6)

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1F ­ 14IENGINE CONTROLS

ECM WIRING DIAGRAM (1.4L/1.6L DOHC ­ 3 OF 6)

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ENGINE CONTROLS 1F ­ 15

ECM WIRING DIAGRAM (1.4L/1.6L DOHC ­ 4 OF 6)

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1F ­ 16IENGINE CONTROLS

ECM WIRING DIAGRAM (1.4L/1.6L DOHC ­ 5 OF 6)

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ENGINE CONTROLS 1F ­ 17

ECM WIRING DIAGRAM (1.4L/1.6L DOHC ­ 6 OF 6)

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1F ­ 18IENGINE CONTROLS

ECM WIRING DIAGRAM (1.8L DOHC ­ 1 OF 6)

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ENGINE CONTROLS 1F ­ 19

ECM WIRING DIAGRAM (1.8L DOHC ­ 2 OF 6)

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1F ­ 20IENGINE CONTROLS

ECM WIRING DIAGRAM (1.8L DOHC ­ 3 OF 6)

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ENGINE CONTROLS 1F ­ 21

ECM WIRING DIAGRAM (1.8L DOHC ­ 4 OF 6)

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1F ­ 22IENGINE CONTROLS

ECM WIRING DIAGRAM (1.8L DOHC ­ 5 OF 6)

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ENGINE CONTROLS 1F ­ 23

ECM WIRING DIAGRAM (1.8L DOHC ­ 6 OF 6)

DAEWOO V­121 BL4

1F ­ 24IENGINE CONTROLS

CONNECTOR END VIEW

64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

1

2

3

4

5

6

7

8

9 10 11 12 13 14 15 16

17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64

Engine Control Module (ECM) MR140
T3D11F40

Engine Control Module (ECM) MR140
T3D11F41

DAEWOO V­121 BL4

ENGINE CONTROLS 1F ­ 25

1 4

2 5

3 6

Electric Exhaust Gas Recirculation(EEGR) Valve Connector
T3D11F46

DAEWOO V­121 BL4

1F ­ 26IENGINE CONTROLS

1

2

3

4

Front Heated Oxygen Sensor (HO2S1) Connector
T3B11F15

1

2

EVAP Canister Purge Solenoid Connector
T3D11F47

DAEWOO V­121 BL4

ENGINE CONTROLS 1F ­ 27

DAEWOO V­121 BL4

1F ­ 28IENGINE CONTROLS

COMPONENT LOCATOR
COMPONENT LOCATOR (1.4L/1.6L DOHC)

Components on ECM Harness 11. 12. 13. 14. 15. Engine Control Module (ECM) Data Link Connector (DLC) Malfunction Indicator Lamp (MIL) ECM/ABS Harness Ground Fuse Panel (2)

30. Cooling Fan Relays (Low) Information Sensors 31. Manifold Absolute Pressure (MAP) Sensor 32. Front Heated Oxygen Sensor (HO2S1) 33. Variable Geometry Induction System (VGIS) Solenoid 34. Engine Coolant Temperature (ECT) Sensor 35. Intake Air Temperature (IAT) Sensor 36. Vehicle Speed Sensor (VSS) 38. Crankshaft Position (CKP) Sensor 39. Knock Sensor 40. Rear Heated Oxygen Sensor (HO2S2) 41. Camshaft Position (CMP) Sensor Not PCM/ECM Connected 42. Evaporative Emission Canister (under vehicle, behind right rear wheel) 43. Engine Oil Pressure Switch 44. Air Cleaner

ECM Controlled Devices Exhaust Gas Recirculation (EGR) Valve Fuel Injector (4) Main Throttle Idle Actuator (MTIA) Fuel Pump Relay Cooling Fan Relays (High) Cooling Fan Control Relay (A/C Only) Electronic Ignition System Ignition Coil Evaporative Emission (EVAP) Control Purge Solenoid 28. Main Relay 29. A/C Compressor Relay 20. 21. 22. 23. 24. 25. 26. 27.

DAEWOO V­121 BL4

ENGINE CONTROLS 1F ­ 29

COMPONENT LOCATOR (1.8L DOHC)

Components on ECM Harness 11. 12. 13. 14. 15. Engine Control Module (ECM) Data Link Connector (DLC) Malfunction Indicator Lamp (MIL) ECM/ABS Harness Ground Fuse Panel (2)

30. Cooling Fan Relays (Low) Information Sensors 31. 32. 33. 34. 35. 36. 38. 39. 40. 41. Manifold Absolute Pressure (MAP) Sensor Front Heated Oxygen Sensor (HO2S1) Throttle Position (TP) Sensor Engine Coolant Temperature (ECT) Sensor Intake Air Temperature (IAT) Sensor Vehicle Speed Sensor (VSS) Crankshaft Position (CKP) Sensor Knock Sensor Rear Heated Oxygen Sensor (HO2S2) Camshaft Position (CMP) Sensor

ECM Controlled Devices 20. 21. 22. 23. 24. 25. 26. 27. Exhaust Gas Recirculation (EGR) Valve Fuel Injector (4) Idle Air Control (IAC) Valve Fuel Pump Relay Cooling Fan Relays (High) Cooling Fan Control Relay (A/C Only) Electronic Ignition System Ignition Coil Evaporative Emission (EVAP) Control Purge Solenoid 28. Main Relay 29. A/C Compressor Relay

Not PCM/ECM Connected 42. Evaporative Emission Canister (under vehicle, behind right rear wheel) 43. Engine Oil Pressure Switch 44. Air Cleaner

DAEWOO V­121 BL4

1F ­ 30IENGINE CONTROLS

DIAGNOSIS
SYSTEM DIAGNOSIS DIAGNOSTIC AIDS
If an intermittent problem is evident, follow the guidelines below. Preliminary Checks Before using this section you should have already performed the "On­Board Diagnostic System Check." Perform a thorough visual inspection. This inspection can often lead to correcting a problem without further checks and can save valuable time. Inspect for the following conditions: S S Engine control module (ECM) grounds for being clean, tight, and in their proper location. Vacuum hoses for splits, kinks, collapsing and proper connections as shown on the Vehicle Emission Control Information label. Inspect thoroughly for any type of leak or restriction. Air leaks at the throttle body mounting area and the intake manifold sealing surfaces. Ignition wires for cracks, hardness, proper routing, and carbon tracking. Wiring for proper connections. Wiring for pinches or cuts. S Poor terminal­to­wire connection. This requires removing the terminal from the connector body.

Road Test If a visual inspection does not find the cause of the problem, the vehicle can be driven with a voltmeter or a scan tool connected to a suspected circuit. An abnormal voltage or scan tool reading will indicate that the problem is in that circuit. If there are no wiring or connector problems found and a DTC was stored for a circuit having a sensor, except for DTC P0171 and DTC P0172, replace the sensor. Fuel System Some intermittent driveability problems can be attributed to poor fuel quality. If a vehicle is occasionally running rough, stalling, or otherwise performing badly, ask the customer about the following fuel buying habits: S S Do they always buy from the same source? If so, fuel quality problems can usually be discounted. Do they buy their fuel from whichever fuel station that is advertising the lowest price? If so, check the fuel tank for signs of debris, water, or other contamination.

S S S S

IDLE LEARN PROCEDURE
Whenever the battery cables, the engine control module (ECM), or the ECM fuse is disconnected or replaced, the following idle learn procedure must be performed: 1. 2. 3. 4. 5. Turn the ignition ON for 5 seconds. Turn the ignition OFF for 5 seconds. Turn the ignition ON for 5 seconds. Start the engine in park/neutral. Allow the engine to run until the engine coolant is above 185° F (85°C ). 6. Turn the A/C ON for 10 seconds, if equipped. 7. Turn the A/C OFF for 10 seconds, if equipped. 8. If the vehicle is equipped with an automatic transaxle, apply the parking brake. While pressing the brake pedal, place the transaxle in D (drive). 9. Turn the A/C ON for 10 seconds, if equipped. 10. Turn the A/C OFF for 10 seconds, if equipped. 11. Turn the ignition OFF. The idle learn procedure is complete.

Diagnostic Trouble Code Tables Do not use the Diagnostic Trouble Code (DTC) tables to try to correct an intermittent fault. The fault must be present to locate the problem. Incorrect use of the DTC tables may result in the unnecessary replacement of parts. Faulty Electrical Connections or Wiring Most intermittent problems are caused by faulty electrical connections or wiring. Perform a careful inspection of suspect circuits for the following: S S S Poor mating of the connector halves. Terminals not fully seated in the connector body. Improperly formed or damaged terminals. All connector terminals in a problem circuit should be carefully inspected, reformed, or replaced to insure contact tension.

DAEWOO V­121 BL4

ENGINE CONTROLS 1F ­ 31

TEC (TOOTH ERROR CORRECTION) LEARN PROCEDURE
When an ECM is reflashed, initialized or replaced, and driveplate of fly wheel has been replaced, follow these procedures to relearn the crankshaft position (CKP) system variation : CAUTION : To avoid personal injury when performing the TEC learn procedure, always set the vehicle parking brake and block the drive wheels. Release the throttle immediately when the engine starts to decelerate. Once the learning procedure is completed, engine control will be learned to the operator, and the engine will respond to throttle position.

1. 2. 3. 4. 5. 6. 7. 8. 9.

Stay the gear parking or neutral. Install the scan tool and select "TEC (Toth Error Correction) LEARN" menu. Start the engine with A/C off. Keep the engine coolant temperature above 65°C (149° F) Put the acceleration pedal above 4000 RPM until the fuel cut­off occurs. Wait 10­15 seconds. Fulfill this procedure again if the scan tool does not display "OK" message. Turn the ignition switch OFF. Turn the ignition swtich ON and then clear the DTC code.

DAEWOO V­121 BL4

1F ­ 32IENGINE CONTROLS

ON­BOARD DIAGNOSTIC (EOBD) SYSTEM CHECK (1.4L/1.6L DOHC)
Circuit Description The On­Board Diagnostic (EOBD) system check is the starting point for any driveability complaint diagnosis. Before using this procedure, perform a careful visual/physical check of the engine control module (ECM) and the engine grounds for cleanliness and tightness. The EOBD system check is an organized approach to identifying a problem created by an electronic engine control system malfunction. Diagnostic Aids An intermittent may be caused by a poor connection, rubbed­through wire insulation or a wire broken inside the insulation. Check for poor connections or a damaged harness. Inspect the ECM harness and connections for improper mating, broken locks, improperly formed or damaged terminals, poor terminal­to­wire connection, and damaged harness. Test Description Numbers below refer to the step number on the Diagnostic Chart: 1. The Malfunction Indicator Lamp (MIL) should be ON steady with the ignition ON and the engine OFF. If not, go to "Diagnostic Aids". 2. Checks the Class 2 data circuit and ensures that the ECM is able to transmit serial data. 3. This test ensures that the ECM is capable of controlling the MIL and the MIL driver circuit is not shorted to ground. 4. If the engine will not start, refer to "Engine Cranks But Will Not Run" in this section. 7. A scan tool parameter which is not within the typical range may help to isolate the area which is causing the problem. 10. This vehicle is equipped with a ECM which utilizes an Electrically Erasable Programmable Read Only Memory (EEPROM). The replacement ECM must be programmed. Refer to the latest Techline procedure for ECM reprogramming.

DAEWOO V­121 BL4

ENGINE CONTROLS 1F ­ 33 On­Board Diagnostic (EOBD) System Check (1.4L/1.6L DOHC)
Step 1 Action 1. Turn the ignition switch to ON. 2. Observe the Malfunction Indicator Lamp (MIL). Is the MIL illuminate? 1. Turn the ignition switch to LOCK. 2. Install the scan tool to the Data link Connector (DLC). 3. Turn the ignition switch to ON. 4. Attempt to display the Engine Control Module (ECM) engine data with the scan tool. Does the scan tool display the ECM engine data? 1. Using the scan tool output test function, select the MIL lamp control and command the MIL off. 2. Observe the MIL. Does the MIL turn OFF? Attempt to start the engine. Does the engine start and continue to run? Value(s) ­ Yes Go to Step 2 No Go to "No Malfunction Indicator Lamp" Go to Step 8

2

­

Go to Step 3

3

­

Go to Step 4

Go to "Malfunction Indicator Lamp on Steady" Go to "Engine Cranks But Will Not Run" Go to Step 7 Go to applicable DTC table

4

­

Go to Step 5

5 6

Select DISPLAY DTC with the scan tool. Are any Diagnostic Trouble Codes (DTCs) stored? Check the display for DTCs P0107, P0108, P0113, P0118, P0122, P0123, P0712, P1392. Are two or more of the following DTCs stored?

­ ­

Go to Step 6 Go to "Multiple ECM Information Sensor DTCs Set" Go to "ECM Output Diagnosis" Go to Step 9

7

Compare the ECM data values displayed on the scan tool to the typical engine scan data values. Are the displayed values normal or close to the typical values? Turn the ignition switch to LOCK. Disconnect the ECM connector. Turn the ignition switch to ON. Check the serial data circuit for an open, short to ground, or short to voltage. Also check the DLC ignition feed circuit for an open or short to ground, and check the DLC ground circuits for an open. Is a problem found? Repair the open, short to ground, or short to voltage in the serial data circuit or the DLC ignition feed circuit. Is the repair complete? 1. Attempt to reprogram the ECM. 2. Attempt to display the ECM data with the scan tool. Does the scan tool display ECM engine data? Replace the ECM. Is the replacement complete? 1. 2. 3. 4.

­

Go to indicated component system check Go to Step 10

8

­

9

­

System OK

­

10

­

Go to Step 2

Go to Step 11

11

­

System OK

­

DAEWOO V­121 BL4

1F ­ 34IENGINE CONTROLS

ON­BOARD DIAGNOSTIC (EOBD) SYSTEM CHECK (1.8L DOHC)
Circuit Description The On­Board Diagnostic (EOBD) system check is the starting point for any driveability complaint diagnosis. Before using this procedure, perform a careful visual/physical check of the engine control module (ECM) and the engine grounds for cleanliness and tightness. The EOBD system check is an organized approach to identifying a problem created by an electronic engine control system malfunction. Diagnostic Aids An intermittent may be caused by a poor connection, rubbed­through wire insulation or a wire broken inside the insulation. Check for poor connections or a damaged harness. Inspect the ECM harness and connections for improper mating, broken locks, improperly formed or damaged terminals, poor terminal­to­wire connection, and damaged harness. Test Description Numbers below refer to the step number on the Diagnostic Chart: 1. The Malfunction Indicator Lamp (MIL) should be ON steady with the ignition ON and the engine OFF. If not, go to"Diagnostic Aids". 2. Checks the Class 2 data circuit and ensures that the ECM is able to transmit serial data. 3. This test ensures that the ECM is capable of controlling the MIL and the MIL driver circuit is not shorted to ground. 4. If the engine will not start, refer to "Engine Cranks But Will Not Run" in this section. 7. A scan tool parameter which is not within the typical range may help to isolate the area which is causing the problem. 10. This vehicle is equipped with a ECM which utilizes an Electrically Erasable Programmable Read Only Memory (EEPROM). The replacement ECM must be programmed. Refer to the latest Techline procedure for ECM reprogramming.

DAEWOO V­121 BL4

ENGINE CONTROLS 1F ­ 35 On­Board Diagnostic (EOBD) System Check (1.8L DOHC)
Step 1 Action 1. Turn the ignition switch to ON. 2. Observe the Malfunction Indicator Lamp (MIL). Is the MIL illuminate? 1. Turn the ignition switch to LOCK. 2. Install the scan tool to the Data link Connector (DLC). 3. Turn the ignition switch to ON. 4. Attempt to display the Engine Control Module (ECM) engine data with the scan tool. Does the scan tool display the ECM engine data? 1. Using the scan tool output test function, select the MIL lamp control and command the MIL off. 2. Observe the MIL. Does the MIL turn OFF? Attempt to start the engine. Does the engine start and continue to run? Value(s) ­ Yes Go to Step 2 No Go to "No Malfunction Indicator Lamp" Go to Step 8

2

­

Go to Step 3

3

­

Go to Step 4

Go to "Malfunction Indicator Lamp on Steady" Go to "Engine Cranks But Will Not Run" Go to Step 7 Go to applicable DTC table

4

­

Go to Step 5

5 6

Select DISPLAY DTC with the scan tool. Are any Diagnostic Trouble Codes (DTCs) stored? Check the display for DTCs P0107, P0108, P0113, P0118, P0122, P0123, P0712, P1392. Are two or more of the following DTCs stored?

­ ­

Go to Step 6 Go to "Multiple ECM Information Sensor DTCs Set" Go to "ECM Output Diagnosis" Go to Step 9

7

Compare the ECM data values displayed on the scan tool to the typical engine scan data values. Are the displayed values normal or close to the typical values? Turn the ignition switch to LOCK. Disconnect the ECM connector. Turn the ignition switch to ON. Check the serial data circuit for an open, short to ground, or short to voltage. Also check the DLC ignition feed circuit for an open or short to ground, and check the DLC ground circuits for an open. Is a problem found? Repair the open, short to ground, or short to voltage in the serial data circuit or the DLC ignition feed circuit. Is the repair complete? 1. Attempt to reprogram the ECM. 2. Attempt to display the ECM data with the scan tool. Does the scan tool display ECM engine data? Replace the ECM. Is the replacement complete? 1. 2. 3. 4.

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Go to indicated component system check Go to Step 10

8

­

9

­

System OK

­

10

­

Go to Step 2

Go to Step 11

11

­

System OK

­

DAEWOO V­121 BL4

1F ­ 36IENGINE CONTROLS

MULTIPLE ECM INFORMATION SENSOR DTCS SET
Circuit Description The Engine Control Module (ECM) monitors various sensors to determine engine operating conditions. The ECM controls fuel delivery, spark advance, transaxle operation, and emission control device operation based on the sensor inputs. The ECM provides a sensor ground to all of the sensors. The ECM applies 5 volts through a pull­up resistor and monitors the voltage present between the sensor and the resistor to determine the status of the Engine Coolant Temperature (ECT) sensor, the Intake Air Temperature (IAT) sensor. The ECM provides the Exhaust Gas Recirculation (EGR) Pintle Position Sensor, the Throttle Position (TP) sensor, the Manifold Absolute Pressure (MAP) sensor, and the Fuel Tank Pressure Sensor with a 5 volt reference and a sensor ground signal. The ECM monitors the separate feedback signals from these sensors to determine their operating status. Diagnostic Aids Be sure to inspect the ECM and the engine grounds for being secure and clean. A short to voltage in one of the sensor circuits can cause one or more of the following DTCs to be set: P0108, P0113, P0118, P0123, P1106, P1111, P1115, P1121, P0463, P0533. If a sensor input circuit has been shorted to voltage, ensure that the sensor is not damaged. A damaged sensor will continue to indicate a high or low voltage after the affected circuit has been repaired. If the sensor has been damaged, replace it. An open in the sensor ground circuit between the ECM and the splice will cause one or more of the following DTCs to be set: P0107, P0108, P0113, P0118, P0122, P0123, P1106, P1111, P1115, P1121, P0462, P0532. A short to ground in the 5 volt reference circuit or an open in the 5 volt reference circuit between the ECM and the splice will cause one or more of the following DTCs to be set: P0107, P0112, P0117, P0122, P1107, P1112, P1114, P1122, P0462, P0532. Check for the following conditions: S Inspect for a poor connection at the ECM. Inspect harness connectors for backed­out terminals, improper mating, broken locks, improperly formed or damaged terminals, and poor terminal­to­wire connection. Inspect the wiring harness for damage. If the harness appears to be OK, observe an affected sensor's displayed value on the scan tool with the ignition ON and the engine OFF while moving connectors and wiring harnesses related to the affected sensors. A change in the affected sensor's displayed value will indicate the location of the fault.

S

Test Description Number(s) below refer to the step number(s) on the Diagnostic Table. The Powertrain On­Board Diagnostic (EOBD) System Check prompts the technician to complete some basic checks and store the freeze frame and failure records data on the scan tool if applicable. This creates an electronic copy of the data taken when the malfunction occurred. The information is then stored on the scan tool for later reference. 9. A faulty EGR valve can leak a small amount of current from the ignition feed circuit to the 5 volt reference circuit. If the problem does not exist with the EGR valve disconnected, replace the EGR valve. 0. If a sensor input circuit has been shorted to voltage, ensure that the sensor has not been damaged. A damaged IAT or ECT sensor will continue to indicate a high voltage or low temperature after the affected circuit has been repaired. A damaged ACT, TP, MAP, Fuel Tank Pressure, or EGR Pintle Position sensor will indicate a high or low voltage or may be stuck at a fixed value after the affected circuit has been repaired. If the sensor has been damaged, replace it. 21. The replacement ECM must be reprogrammed. Refer to the latest Techline procedure for ECM reprogramming. 1.

DAEWOO V­121 BL4

ENGINE CONTROLS 1F ­ 37

Multiple ECM Information Sensor DTCs Set
Step 1 Action Perform an On­Board Diagnostic (EOBD) system check. Is the check complete. 1. Turn the ignition switch to LOCK. 2. Disconnect the Engine Control Module (ECM) connector. 3. Turn the ignition switch to ON. 4. Check the 5V reference circuit for the following conditions: S Poor connection at the ECM. S Open between the ECM connector affected sensors shorted to ground or voltage. 5. If a problem is found, locate and repair the open or short circuit as needed. Is a problem found? 1. Check the sensor ground circuit for the following conditions: S Poor connection at the ECM or affected sensors. S Open between the ECM connector and the affected sensors. 2. If a problem is found, repair it as needed. Is a problem found? 4 Measure the voltage of the Exhaust Gas Recirculation (EGR) Pintle Position Sensor signal circuit between ECM harness connector and ground. Does the voltage near the specified value? Measure the voltage of the Manifold Absolute Pressure (MAP) sensor signal circuit between the ECM harness connector and ground. Does the voltage near the specified value? Measure the voltage of the Throttle Position (TP) sensor signal circuit between the ECM harness connector and ground. Does the voltage near the specified value? Measure the voltage of the Intake Air Temperature (IAT) sensor signal circuit between the ECM harness connector and ground. Does the voltage near the specified value? Measure the voltage of the Engine Coolant Temperature (ECT) sensor signal circuit between the ECM harness connector and ground. Does the voltage near the specified value? 1. Disconnect the EGR valve connector. 2. Measure the voltage of the EGR Pintle Position sensor signal circuit between the ECM harness connector and ground. Does the voltage near the specified value? 0V Go to Step 5 Go to Step 9 Value(s) ­ Yes Go to Step 2 No Go to "On­Board Diagnostic System Check" Go to Step 3

2

­

Go to Step 19

3

­

Go to Step 19

Go to Step 4

5

0V

Go to Step 6

Go to Step 12

6

0V

Go to Step 7

Go to Step 12

7

0V

Go to Step 8

Go to Step 13

8

0V

Go to Step 16

Go to Step 14

9

0V

Go to Step 10

Go to Step 15

DAEWOO V­121 BL4

1F ­ 38IENGINE CONTROLS
Step 10 11 Action Replace the EGR valve. Is the replacement complete? Locate and repair the short to voltage in the MAP sensor signal circuit. Is the repair complete? Locate and repair the short to voltage in the TP sensor signal circuit. Is the repair complete? Locate and repair the short to voltage in the IAT sensor signal circuit. Is the repair complete? Locate and repair the short to voltage in the ECT sensor signal circuit. Is the repair complete? Locate and repair the short to voltage in the EGR Pintle Position sensor circuit. Is the repair complete? Measure the voltage of the fuel tank pressure sensor signal circuit between the ECM harness connector and ground. Does the voltage near the specified value? Locate and repair the short to voltage in the fuel tank pressure sensor signal circuit. Is the replacement complete? Replace the ECM. Is the repair complete? 1. Using the scan tool, clear the Diagnostic Trouble Codes (DTCs). 2. Start the engine and idle at normal operating temperature. 3. Operate the vehicle within the conditions for setting the DTCs as specified in the supporting text. Does the scan tool indicate that this diagnostic ran and passed? Check if any additional DTCs are set. Are any DTCs displayed that have not been diagnosed? Value(s) ­ ­ Yes Go to Step 19 Go to Step 19 No ­ ­

12

­

Go to Step 19

­

13

­

Go to Step 19

­

14

­

Go to Step 19

­

15

­

Go to Step 19

­

16

0V

Go to Step 18

Go to Step 17

17

­

Go to Step 19

­

18 19

­ ­

Go to Step 19 Go to Step 20 Go to Step 2

22

­

Go to applicable DTC table

System OK

DAEWOO V­121 BL4

ENGINE CONTROLS 1F ­ 39

DAEWOO V­121 BL4

1F ­ 40IENGINE CONTROLS

ENGINE CRANKS BUT WILL NOT RUN (1.4L/1.6L DOHC)
Test Description The number(s) below refer to step(s) on the diagnostic table. 1. The On­Board Diagnostic (EOBD) System Check prompts the technician to complete some basic checks and store the freeze frame and failure records data on the scan tool if applicable. This creates an electronic copy of the data taken when the occurred. The information is then stored on the scan tool for later reference. By performing a compression test, it can be determined if the engine has the mechanical ability to run. It is important to check for the presence of spark from all of the ignition wires. If spark is present fro