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1F 280 ENGINE CONTROLS
SYMPTOM DIAGNOSIS
IMPORTANT PRELIMINARY CHECKS
Important: Several symptom procedures call for a careful visual/physical inspection. Always perform the visual/ physical test first. Visual inspections may lead to Step 1 Action Perform the On-Board Diagnostic (EOBD) System Check. Are any Diagnostic Trouble Code(s) (DTCs) stored in the Engine Control Module (ECM) memory? 1. Inspect all of the ECM ground connections. 2. Inspect all of the vacuum hoses for splits, kinks, and proper connections. 3. Check for air leaks at all of the mounting areas of the intake manifold sealing surfaces. 4. Inspect the ignition wires for cracking, hardness, proper routing, and carbon tracking. 5. Inspect the wiring for proper connections, pinches, and cuts. Are all checks complete? correcting a problem without further checks and can save valuable time.
Value(s)
Yes Go to Appropriate DTC Table
No
Go to Step 2
2
Go to Appropriate Symptom Table
DAEWOO M-150 BL2
ENGINE CONTROLS 1F 281
INTERMITTENT
Definition: The problem may or may not illuminate the Malfunction Indicator Lamp (MIL) or store a Diagnostic Trouble Code (DTC). Important: Do not use the Diagnostic Trouble Code (DTC) tables for intermittent problems. A fault must be Step 1 1. Perform a careful inspection of any suspect circuits. 2. Inspect for poor mating of the connector halves, or terminals not fully seated into the connector body. 3. Inspect for improperly formed or damaged terminals. 4. Inspect for poor terminal-to-wire connections. This requires removing the terminal from the connector body to inspect it. Are any problems present? Repair the electrical connections as needed. Is the repair complete? Road test the vehicle with a voltmeter connected to a suspected circuit or a scan tool connected to the Data Link Connector (DLC). Did the voltmeter or the scan tool indicate an abnormal voltage or scan reading? Replace the sensor in the affected circuit, if a Diagnostic Trouble Code (DTC) was stored for this circuit (except for the DTCs P0171 and P0172). Is the repair complete? Does an intermittent Malfunction Indicator Lamp (MIL) or DTC occur? 1. Check for a faulty relay, Engine Control Module (ECM) driven solenoid, or switch. 2. Check for improper installation of electrical devices, such as lights, two-way radios, electric motors, etc. 3. Inspect the ignition control wires for proper routing (away from ignition wires, ignition system components, and the generator). 4. Check for a short-to-ground in the MIL circuit or the DLC "test" terminal. 5. Inspect the ECM ground connections. 6. Correct or repair the affected circuits as needed. Is the repair complete? 1. Check for a loss of DTC memory. 2. Disconnect the throttle position (TP) sensor. 3. Run the engine at idle until the MIL comes on. 4. Turn the ignition OFF. Is DTC P0122 stored in memory? Action Were the Important Preliminary Checks performed? Go to Step 2 Value(s) Yes No Go to "Important Preliminary Checks" present in order to locate the problem. If a fault is intermittent, use of Diagnostic Trouble Code tables may result in the replacement of good parts.
2
Go to Step 3 System OK
Go to Step 4
3
4
Go to Step 5 System OK Go to Step 7 Go to Step 8 Go to Step 6
5
6
7
System OK
8
Go to Step 10 Go to Step 9
DAEWOO M-150 BL2
1F 282 ENGINE CONTROLS Intermittent (Cont'd)
Step 9 10 Action 1. Turn the ignition OFF. 2. Replace the ECM. Is the repair complete? Does the vehicle stall while driving? Monitor the oxygen sensor and the injector base pulse width with the scan tool. Does the scan tool display a steady low voltage (about 0 millivolts) for the oxygen sensor with the control module commanding an injector base pulse width of the value specified? 1. Check for an open diode across the A/C clutch and for other open diodes. 2. Repair or replace any components as needed. Is the repair complete? Value(s) System OK Go to Step 11 Go to Step 12 Yes No
11
8 ms
Go to Step 9
Go to Step 12
12
System OK
DAEWOO M-150 BL2
ENGINE CONTROLS 1F 283
HARD START
Definition: The engine cranks OK, but does not start for a long time. The engine eventually runs or may start and immediately die. Step 1 1. Connect the scan tool to the Data Link Connector (DLC). 2. Check the Engine Coolant Temperature (ECT) sensor and the Intake Air Temperature (IAT) sensor using the scan tool. 3. Compare the coolant temperature and the IAT with the ambient temperature when the engine is cold. Do the ECT and the IAT readings differ from the ambient temperature by more than the value specified? 1. Measure the resistance of the ECT sensor and the IAT sensor. 2. Compare the resistance value to specifications using the Temperature Vs. Resistance tables for DTCs P0118 and P0113. 3. If the resistance is not the same, replace the faulty sensor. Is the repair complete? 1. Check for a sticking throttle shaft or a binding linkage that may cause a high Throttle Position (TP) sensor voltage. Repair or replace as needed. 2. Check the TP sensor voltage reading with the throttle closed. Does the voltage measure within the value specified? 1. Check the Manifold Absolute Pressure (MAP) sensor response and accuracy. 2. Replace the MAP sensor as needed. Is the repair complete? Check the fuel pump operation. Does the fuel pump operate for the specified time when the ignition switch is turned ON? Check the fuel system pressure. Is the fuel pressure within the specifications? Check for water contamination in the fuel. Is fuel contaminated? Replace the contaminated fuel. Is the repair complete? Action Were the Important Preliminary Checks performed? Go to Step 2 Important: Ensure that the driver is using the correct starting procedure. Before diagnosing, check service bulletins for updates. Value(s) Yes No Go to "Important Preliminary Checks"
2
3_C (5_F)
Go to Step 3
Go to Step 4
3
System OK
4
0.40.8 V
Go to Step 5
Go to Step 26
5
System OK
Go to Step 6 Go to "Fuel Pump Relay Circuit Check" Go to Step 27 Go to Step 10
6 7 8 9
2 sec 380 kPa (55 psi)
Go to Step 7 Go to Step 8 Go to Step 9 System OK
DAEWOO M-150 BL2
1F 284 ENGINE CONTROLS Hard Start (Cont'd)
Step Action 1. Check the fuel injector driver circuit. 2. Disconnect all of the fuel injector harness connectors at the fuel injectors. 3. Connect an injector test light between the harness terminals of each fuel injector connector. 4. Note the test light while cranking the engine. Does the test light blink at all connectors? Check the fuel injector driver wiring harness, the connectors, and the connector terminals for the proper connections. Is the problem found? Repair the wiring harness, the connector, or the connector terminal as needed. Is the repair complete? Measure the resistance of each fuel injector. Is the fuel injector resistance within the value specified at 20_C (68_F) Note: The resistance will increase slightly at higher temperatures)? Replace any fuel injector with a resistance that is out of specifications. Is the repair complete? Perform an injector diagnosis. Is the problem found? Replace any restricted or leaking fuel injectors as needed. Is the repair complete? 1. Check for the proper ignition voltage output for each cylinder with a spark tester. 2. Inspect the spark plugs for cracks, wear, improper gap, burned electrodes, or heavy deposits. 3. Inspect the ignition wires for short conditions. 4. Inspect all of the ignition grounds for loose connections. 5. Inspect the Engine Control Module (ECM) for the proper operation. Is the problem found? Correct or replace any faulty ignition components. Is the repair complete? Does the engine misfire or cut out under load or at idle? Does the engine start, but then immediately stall? 1. Remove the Crankshaft Position (CKP) sensor. 2. Inspect for faulty connections and repair as needed. Is the problem found? Repair the faulty connections as needed. Is the repair complete? Value(s) Yes No
10
Go to Step 13 Go to Step 12 System OK
Go to Step 11
11
Go to Step 28
12
13
11.612.4
Go to Step 15
Go to Step 14
14 15 16
System OK System OK Go to Step 16 Go to Step 17
17
Go to Step 18 Go to Step 22 System OK System OK Go to "Ignition System Check" Go to Step 21
Go to Step 19 Go to Step 20 Go to Step 23
18 19 20 21
Go to Step 25
22
DAEWOO M-150 BL2
ENGINE CONTROLS 1F 285 Hard Start (Cont'd)
Step Action 1. Check for the proper valve timing. 2. Check the cylinder compression. 3. Inspect the pushrods, the rocker arms, the valve springs, and the camshaft lobes for excessive wear. 4. Inspect the intake manifold and the exhaust manifold passages for casting flash. Is the problem found? Repair or replace any components as needed. Is the repair complete? Check the idle air control valve operation. Repair or replace components as needed. Is the repair complete? Check the throttle position sensor circuit for proper operation. Repair or replace components as needed. Is the repair complete? Repair the fuel system as needed. Is the repair complete? 1. Turn the ignition OFF. 2. Replace the ECM. Is the repair complete? Value(s) Yes No
23
Go to Step 24 System OK System OK System OK System OK
Go to Step 25
24 25
26 27
28
System OK
DAEWOO M-150 BL2
1F 286 ENGINE CONTROLS
SURGES OR CHUGGLES
Definition: Engine power variation under steady throttle or cruise. Feels like the vehicle speeds up and slows down with no change in the accelerator pedal position. Important: Make sure the driver understands A/C compressor operation as described in the owner's manual. The speedometer reading and the speed reading on the scan tool should be equal. Before diagnosing the symptom, check service bulletins for updates. Value(s) Go to Step 2 2 Connect the scan tool to the Data Link Connector (DLC). Does the oxygen sensor (O2S) respond quickly to different throttle positions? 1. Check the O2S for silicone or other contaminants from fuel or use of improper Room Temperature Vulcanizing (RTV) sealant. 2. Replace the contaminated O2S. Is the repair complete? 1. Drive the vehicle at the speed of the complaint. 2. Monitor the long term fuel trim reading using the scan tool. Is the long term fuel trim reading within the value specified? Is the long term fuel trim reading below the value specified? 20% 6 Is the long term fuel trim reading above the value specified? 25% 7 8 9 Check the fuel system pressure while the condition exists. Is the fuel system pressure within specifications? Check the in-line fuel filter. Is the filter dirty or plugged? Perform an injector diagnosis. Did the injector diagnosis pinpoint the problem? 1. Check for proper ignition voltage output using a spark tester. 2. Inspect the spark plugs for cracks, wear, improper gap, burned electrodes, or heavy deposits. Is the problem found? Repair or replace any ignition system components as needed. Is the repair complete? 1. Inspect the ECM grounds for being clean, tight, and in their proper locations. 2. Inspect the vacuum lines for kinks or leaks. Is the problem found? 380 kPa (55 psi) Go to Step 4 Go to Step 3 Yes No Go to "Important Preliminary Checks"
Step 1
Action Were the Important Preliminary Checks performed?
3
System OK
4
2025%
Go to Step 7 Go to "Diagnostic Aids for DTC P0172" Go to "Diagnostic Aids for DTC P0171"
Go to Step 5
5
Go to Step 6
Go to Step 8 Go to Step 18 Go to Step 19
Go to Step 17 Go to Step 9 Go to Step 10
10
Go to Step 11 System OK Go to Step 13 Go to Step 14 Go to Step 12
11
12
DAEWOO M-150 BL2
ENGINE CONTROLS 1F 287 Surges or Chuggles (Cont'd)
Step 13 14 15 Action Repair the electrical connections or the vacuum lines as needed. Is the repair complete? Check the generator output voltage. Is the generator voltage within the value specified? Repair the generator. Is the repair complete? 1. Check for intermittent Electric Exhaust Gas Recirculation (EEGR) valve operation. 2. Repair or replace any components as needed. Is the repair complete? Repair the fuel system as needed. Is the repair complete? Replace the fuel filter. Is the repair complete? Replace the leaking or restricted fuel injectors. Is the repair complete? Value(s) System OK 1216 V Go to Step 16 System OK Go to Step 15 Yes No
16
System OK System OK System OK System OK
17 18 19
DAEWOO M-150 BL2
1F 288 ENGINE CONTROLS
LACK OF POWER, SLUGGISHNESS, OR SPONGINESS
Definition: The engine delivers less than expected power. There is little or no increase in speed when the accelerator pedal is partially applied. Step 1 1. Verify the customer's complaint. 2. Compare the performance of the customer's vehicle with a similar unit. Does the problem exist? 1. Inspect the air filter for excessive contamination. 2. Replace the air filter as needed. 3. Check the transaxle shift pattern and down shift operation. Does the transaxle operate properly? Check the fuel system pressure. Is the fuel system pressure within specifications? Repair the transaxle as needed. Is the repair complete? Repair the fuel system as needed. Is the repair complete? Check for a restricted fuel filter or contaminated fuel. Is the problem found? Repair or replace any components as needed. Is the repair complete? 1. Check the ignition system output for all of the cylinders using a spark tester. 2. Check for proper ignition control operation. Is the ignition system operating properly? 1. With the engine at normal operating temperature, connect a vacuum gauge to a vacuum port on the intake manifold. 2. Operate the engine at 1000 rpm. 3. Record the vacuum reading. 4. Increase the engine speed to 2500 rpm. 5. Note the vacuum reading at a steady 2500 rpm. Does the vacuum decrease more than the value specified? Repair or replace any ignition system components as needed. Is the repair complete? Inspect the exhaust system for restrictions and damaged or collapsed pipes. Is the problem found? Repair or replace any components as needed. Is the repair complete? 1. Check the cylinder compression and valve timing. 2. Inspect the camshaft for excessive wear. Is the problem found? Action Were the Important Preliminary Checks performed? Go to Step 2 2 Go to Step 3 System OK Value(s) Yes No Go to "Important Preliminary Checks"
3
Go to Step 4 380 kPa (55 psi) Go to Step 7 System OK System OK Go to Step 8 System OK Go to Step 5 Go to Step 6
4 5 6 7 8
Go to Step 9
9
Go to Step 10 Go to Step 11
10
10 kPa (3 in Hg)
Go to Step 12
Go to Step 15
11
System OK Go to Step 13 System OK Go to Step 14
12 13
14
Go to Step 15 Go to Step 16
DAEWOO M-150 BL2
ENGINE CONTROLS 1F 289 Lack of Power, Sluggishness, or Sponginess (Cont'd)
Step 15 Action Repair or replace any engine components as needed. Is the repair complete? 1. Check the Engine Control Module (ECM) grounds for being clean, tight, and in their proper location. 2. Check the exhaust recirculation valve for being open or partially open all the time. 3. Check the torque converter clutch operation. 4. Check the A/C system operation. 5. Check the generator output. 6. Repair the generator if the output is not within the specified range. Are all checks and repairs complete? Value(s) System OK Yes No
16
1216 V
System OK
DAEWOO M-150 BL2
1F 290 ENGINE CONTROLS
DETONATION/SPARK KNOCK
Step 1 1. Fill the fuel tank with a known good grade of gasoline that has the octane rating of the value specified. 2. Reevaluate the vehicle's performance. Does the detonation problem still exist? 1. Inspect for low engine coolant level. 2. Check for restricted airflow to the radiator or restricted coolant flow. 3. Check for a faulty thermostat. 4. Check for an incorrect coolant solution. Is the problem found? Repair or replace any cooling system components as needed. Is the repair complete? 1. Check the engine coolant temperature using the scan tool. 2. Replace the Engine Coolant Temperature (ECT) sensor if the resistance is not within specifications as listed in the Diagnostic Aids for diagnostic trouble code P0118. Is the problem found? Replace the ECT sensor or repair the circuit as needed. Is the repair complete? 1. Check the ignition system output with a spark tester. 2. Inspect the spark plugs for the proper heat range and gap. 3. Check for the proper operation of the ignition controls. Is the ignition system operating properly? Repair or replace the ignition system components as needed. Is the repair complete? 1. Connect the scan tool to the Data Link Connector (DLC). 2. Road test the vehicle at the speed of the complaint. 3. Monitor the long term fuel trim reading from the scanner data stream. Is the long term fuel trim reading above the value specified? Check the fuel system pressure. Is the problem found? Repair or replace the fuel system components as needed. Is the repair complete? Action Were the Important Preliminary Checks performed? Go to Step 2 Value(s) Yes No Go to "Important Preliminary Checks"
2
91 octane
Go to Step 3
System OK
3
Go to Step 4 System OK Go to Step 5
4
5
Go to Step 6 System OK
Go to Step 7
6
7
Go to Step 9 System Ok
Go to Step 8
8
9
25% 380 kPa (55 psi)
Go to "Diagnostic Aids for DTC P0171" Go to Step 11
Go to Step 10 Go to Step 12
10 11
System OK
DAEWOO M-150 BL2
ENGINE CONTROLS 1F 291 Detonation/Spark Knock (Cont'd)
Step Action 1. Inspect for carbon buildup inside the engine. 2. Remove the carbon with a top engine cleaner. Follow the instructions supplied with the product. 3. Check the basic engine parts such as the camshaft, the cylinder head, the pistons, etc. for excessive wear. 4. Replace any excessively worn parts. Is the procedure complete? 1. Check the exhaust gas recirculation valve for proper operation. 2. Check the air intake system for proper operation. 3. Check the torque converter clutch operation and transaxle shift points. 4. Check the service bulletins for Programmable Read Only Memory (PROM) updates. 5. Check the cylinder compression. 6. Repair or replace any faulty components. Are all checks and repairs complete? Value(s) Yes No
12
Go to Step 13
13
System OK
DAEWOO M-150 BL2
1F 292 ENGINE CONTROLS
HESITATION, SAG, STUMBLE
Definition: Momentary lack of response as the accelerator is pushed down. This can occur at any vehicle speed. It is usually the most severe when first trying to make the vehicle move, as from a stop. Hesitation, sag, or stumble may cause the engine to stall if severe enough. Step 1 1. Check the fuel system pressure. If the pressure is not within the value specified, service the fuel system as needed. 2. Inspect the Throttle Position (TP) sensor for binding or sticking. The TP sensor voltage should increase at a steady rate as the throttle is moved toward Wide Open Throttle (WOT). Is the problem found? Repair or replace any components as needed. Is the repair complete? 1. Check the Manifold Absolute Pressure (MAP) sensor response and accuracy. 2. Inspect the fuel for water contamination. 3. Check the Evaporative Emission (EVAP) Canister Purge System for proper operation. Is the problem found? Repair or replace any components as needed. Is the repair complete? 1. Disconnect all of the fuel injector harness connectors. 2. Connect an injector test light between the harness terminals of each fuel injector. 3. Note the test light while cranking the engine. Does the test light blink on all connectors? 1. Repair or replace the faulty fuel injector drive harness, the connector, or the connector terminal. 2. If the connections and the harnesses are good, replace the Engine Control Module (ECM). Is the repair complete? Measure the resistance of each fuel injector. Is the fuel injector resistance within the value specified (the resistance will increase slightly at higher temperatures)? Replace any of the fuel injectors with a resistance that is out of specifications. Is the repair complete? Perform an injector diagnosis. Is the problem found? Replace any restricted or leaking fuel injectors. Is the repair complete? Check the fuel system pressure after a cold start or during moderate or full throttle acceleration. Is the fuel pressure within specifications? Action Were the Important Preliminary Checks performed? Go to Step 2 Important: Before diagnosing this condition, check service bulletins for PROM updates.
Value(s)
Yes
No Go to "Important Preliminary Checks"
2
380 kPa (55 psi)
Go to Step 3 System OK
Go to Step 4
3
4
Go to Step 5 System OK Go to Step 6
5
6
Go to Step 8 Go to Step 7
7
System OK
8
11.612.4
Go to Step 10
Go to Step 9
9 10 11 12
System OK 380 kPa (55 psi) Go to Step 11 System OK Go to Step 12
Go to Step 14
Go to Step 13
DAEWOO M-150 BL2
ENGINE CONTROLS 1F 293 Hesitation, Sag, Stumble (Cont'd)
Step 13 Action Repair the restriction in the fuel system or replace the faulty fuel pump. Is the repair complete? 1. Check for faulty ignition wires. 2. Inspect for fouled spark plugs. 3. Check the ignition system output on each cylinder with a spark tester. Is the problem found? Repair or replace any ignition components as needed. Is the repair complete? 1. Check the generator output voltage. 2. Repair or replace the generator if the generator output is less than the value specified. 3. Check the Electric Exhaust Gas Recirculation (EEGR) valve operation. Are all checks and needed repairs complete? Value(s) System OK Yes No
14
Go to Step 15 System OK Go to Step 16
15
16
System OK
DAEWOO M-150 BL2
1F 294 ENGINE CONTROLS
CUTS OUT, MISSES
Definition: Steady pulsation or jerking that follows engine speed, usually more pronounced as engine load inStep 1 Check the ignition system voltage output for all of the cylinders using a spark tester. Is spark present on all of the cylinders? 1. Inspect the spark plugs for excessive wear, insulation cracks, improper gap, or heavy deposits. 2. Check the resistance of the ignition wires. Replace any ignition wires that have a resistance greater than the value specified. Is the problem found? Repair or replace any components as needed. Is the repair complete? With the engine running, spray the ignition wires with a fine water mist to check for arcing and shorting to ground. Is the problem found? Replace the ignition wires. Is the repair complete? 1. Perform a cylinder compression test. 2. If the compression is low, repair the engine as needed. 3. Inspect for proper valve timing, bent pushrods, worn rocker arms, broken or weak valve springs, and worn camshaft lobes. 4. Inspect the intake manifold and the exhaust manifold passages for casting flash. Is the problem found? Repair or replace any components as needed. Is the repair complete? 1. Check the fuel system for a plugged in-line fuel filter. 2. Check the fuel system for low fuel pressure. If the fuel pressure is below the value specified, service the fuel system as needed. 3. Inspect for contaminated fuel. Is the problem found? Repair or replace any components as needed. Is the repair complete? 1. Disconnect all of the fuel injector harness connectors at the fuel injectors. 2. Connect an injector test light to the harness terminals of each fuel injector connector. 3. Note the test light while cranking the engine for each fuel injector. Does the test light blink for all of the fuel injectors? Action Were the Important Preliminary Checks performed? Go to Step 2 2 Go to Step 3 creases. The exhaust has a steady spitting sound at idle or low speed. Value(s) Yes No Go to "Important Preliminary Checks" Go to "Ignition System Check"
3
30000
Go to Step 4 System OK
Go to Step 5
4
5
Go to Step 6 System OK Go to Step 7
6
7
Go to Step 8 System OK
Go to Step 9
8
9
380 kPa (55 psi)
Go to Step 10 System OK
Go to Step 11
10
11
Go to Step 13
Go to Step 12
DAEWOO M-150 BL2
ENGINE CONTROLS 1F 295 Cuts Out, Misses (Cont'd)
Step Action 1. Repair or replace the faulty injector drive circuit harness, the connector, or the connector terminal. 2. If the connections and the harnesses are good, replace the Engine Control Module (ECM). Is the repair complete? Measure the resistance of each fuel injector. Is the injector resistance within the value specified (the resistance will increase slightly at higher temperatures)? Replace any fuel injectors with a resistance that is out of specifications. Is the repair complete? Perform an injector diagnosis. Is the problem found? Replace any restricted or leaking fuel injectors. Is the repair complete? 1. Check for electromagnetic interference. 2. Monitor the engine rpm with a scan tool. Does the scan tool rpm change greatly with little change in actual engine rpm? 1. Inspect the routing of the ignition wires. 2. Inspect all of the ignition system grounds. 3. Correct the routing or repair the ground connections as needed. Are all checks and needed repairs complete? Value(s) Yes No
12
System OK
13
11.612.4
Go to Step 15
Go to Step 14
14 15 16
System OK Go to Step 16 System OK Go to Step 17
17
Go to Step 18
18
System OK
DAEWOO M-150 BL2
1F 296 ENGINE CONTROLS
POOR FUEL ECONOMY
Definition: Fuel economy, as measured by an actual road test, is noticeably lower than expected. Also, fuel economy is noticeably lower than it was on this vehicle at one time, as previously shown by an actual road test. Important: Driving habits affect fuel economy. Check the owner's driving habits by asking the following questions: Step 1 1. Inspect the air filter for excessive contamination. 2. Inspect for fuel system leaks. Are all needed checks complete? 1. Inspect the spark plugs for excessive wear, insulation cracks, improper gap, or heavy deposits. 2. Replace any faulty spark plugs. 3. Inspect the ignition wires for cracking, hardness, and proper connections. Are all needed checks and repairs complete? 1. Inspect the engine coolant level. 2. Check the thermostat for being always open or for an incorrect heat range. 3. Replace the thermostat as needed. Are all needed checks and repairs complete? 1. Check the transaxle shift pattern. Ensure all transaxle gears are functioning. 2. Check for proper calibration of the speedometer. 3. Check the brakes for dragging. 4. Check the cylinder compression. 5. Repair, replace, or adjust any components as needed. Are all checks and needed repairs complete? Action Were the Important Preliminary Checks performed? Go to Step 2 2 Go to Step 3 1. Is the A/C system (i.e. defroster mode) turned on all the time? 2. Are the tires at the correct air pressure? 3. Have excessively heavy loads been carried? 4. Does the driver accelerate too much and too often? Suggest the driver read the section in the owner's manual about fuel economy. Value(s) Yes No Go to "Important Preliminary Checks"
3
Go to Step 4
4
Go to Step 4
5
System OK
DAEWOO M-150 BL2
ENGINE CONTROLS 1F 297
ROUGH, UNSTABLE, OR INCORRECT IDLE, STALLING
Definition: The engine runs unevenly at idle. If the condition is bad enough, the vehicle may shake. Also, the idle varies in rpm (called "hunting"). Either condition may be severe enough to cause stalling. The engine idles at incorrect idle speed. Step 1 1. Connect the scan tool to the Data Link Connector (DLC). 2. Monitor the oxygen sensor (O2S) reading at different throttle positions. Does the O2S change quickly from rich to lean at the different throttle positions? Check the O2S for contamination from fuel or improper use of room temperature vulcanizing sealant. Is the O2S contaminated? Replace the contaminated O2S as needed. Is the repair complete? 1. Check for a sticking throttle shaft or binding throttle linkage that may cause incorrect Throttle Position (TP) sensor voltage. 2. Check the TP sensor voltage reading with the throttle closed. Is the TP sensor voltage within the value specified? 1. Check the Engine Coolant Temperature (ECT) sensor voltage reading using the scan tool. 2. Compare the ECT sensor reading with the ambient temperature when the engine is cold. Does the ECT sensor temperature reading differ from the ambient temperature by more than the value specified? Check for high resistance in the ECT sensor circuit or the sensor itself. Is the problem found? Replace the ECT sensor or repair the circuit as needed. Is the repair complete? Check the Manifold Absolute Pressure (MAP) sensor for response and accuracy. Is the problem found? Replace the MAP sensor or repair the MAP sensor circuit as needed. Is the repair complete? 1. Road test the vehicle at the speed of the complaint. 2. Monitor the long term fuel trim reading using the scan tool. Is the long term fuel trim reading within the value specified? Action Were the Important Preliminary Checks performed? Go to Step 2 Important: Before diagnosing the symptom, check service bulletins for updates.
Value(s)
Yes
No Go to "Important Preliminary Checks"
2
Go to Step 5 Go to Step 4 System OK Go to Step 5 Go to Step 3
3
4
5
0.40.8 V
Go to Step 6
Go to "Diagnostic Aids for DTC P0123"
6
3_C (5_F)
Go to Step 7
Go to Step 9
7
Go to Step 8 System OK Go to Step 10 System OK
Go to Step 9
8
9
Go to Step 11
10
11
2025%
Go to Step 14
Go to Step 12
DAEWOO M-150 BL2
1F 298 ENGINE CONTROLS Rough, Unstable, or Incorrect Idle, Stalling (Cont'd)
Step 12 Action Is the long term fuel trim reading below the value specified? 20% 13 Is the long term fuel trim reading above the value specified? 25% 1. Disconnect all of the fuel injector harness connectors at the fuel injectors. 2. Connect an injector test light between the harness terminals of each fuel injector connector. 3. Note the test light while cranking the engine. Does the test light blink for all of the fuel injectors? 1. Repair or replace the faulty injector drive circuit harness, the connector, or the connector terminals as needed. 2. If the harness, the connectors, and the terminals are OK, replace the Engine Control Module (ECM). Is the repair complete? Measure the resistance of each of the fuel injectors. Is the resistance within the value specified (the resistance will increase slightly at higher temperatures)? Replace any fuel injectors with a resistance that is out of specifications. Is the repair complete? Perform an injector diagnosis. Is the problem found? Replace any leaking or restricted fuel injectors. Is the repair complete? 1. With the engine OFF, disconnect the fuel pressure regulator vacuum hose. 2. Thoroughly inspect the fuel pressure regulator vacuum port and the fuel pressure regulator vacuum hose for the presence of fuel. Is the problem found? Replace the fuel pressure regulator as needed. Is the repair complete? 1. Check the ignition system output voltage for all of the cylinders using a spark tester. 2. Inspect the spark plugs for excessive wear, insulation cracks, improper gap, or heavy deposits. 3. Inspect the ignition wires for cracking, hardness, or improper connections. 4. Replace any ignition wires with a resistance over the value specified. Is the problem found? Repair or replace any ignition system components as needed. Is the repair complete? Value(s) Yes Go to "Diagnostic Aids for DTC P0172" Go to "Diagnostic Aids for DTC P0171" No
Go to Step 13
14
Go to Step 16 Go to Step 15
15
System OK
16
11.612.4
Go to Step 18
Go to Step 17
17 18 19
System OK Go to Step 19 System OK Go to Step 20
20
Go to Step 21 System OK Go to Step 22
21
22
30000
Go to Step 23
Go to Step 24
23
System OK
DAEWOO M-150 BL2
ENGINE CONTROLS 1F 299 Rough, Unstable, or Incorrect Idle, Stalling (Cont'd)
Step Action 1. Inspect for vacuum leaks. 2. Check for proper Positive Crankcase Ventilation (PCV) operation. 3. Check the Idle Air Control (IAC) valve operation. 4. Inspect the ECM ground connections. Is the problem found? Repair or replace any components as needed. Is the repair complete? 1. Check the Electric Exhaust Gas Recirculation (EEGR) valve for proper operation. 2. Inspect the battery cables and the ground straps for proper connections. 3. Check the generator voltage output. Repair or replace the generator if the voltage output is not within the value specified. Is the problem found? Repair or replace any components as needed. Is the repair complete? Inspect for broken engine mounts. Check for proper valve timing. Perform a cylinder compression test. Inspect for bent pushrods, worn rocker arms, broken or weak valve springs, and a worn camshaft. 5. Perform repairs as needed. Are all of the checks and needed repairs complete? 1. 2. 3. 4. Value(s) Yes No
24
Go to Step 25 System OK Go to Step 26
25
26
1216 V
Go to Step 27 System OK
Go to Step 28
27
28
System OK
DAEWOO M-150 BL2
1F 300 ENGINE CONTROLS
EXCESSIVE EXHAUST EMISSIONS OR ODORS
Definition: A vehicle fails an emission test. The vehicle has an excessive rotten egg smell. Excessive odors do not necessarily indicate excessive emissions. Step 1 1. Run the engine until it reaches operating temperature. 2. Perform an emission test. Did the vehicle pass the emission test? 1. Connect the scan tool to the Data Link Connector (DLC). 2. Road test the vehicle. 3. Monitor the long term fuel trim memory. Is the long term fuel trim memory within the value specified? Is the long term fuel trim memory below the value specified? 20 % 5 Is the long term fuel trim memory above the value specified? 25 % 1. Check for a properly installed fuel cap. 2. Check the fuel system pressure. 3. Perform an injector diagnosis. Is the problem found? 1. Repair or replace any fuel system components as needed. 2. Perform an emission test. Did the vehicle pass the emission test? 1. Check the ignition system for proper operation. 2. Inspect the spark plugs for excessive wear, insulation cracks, improper gap, or heavy deposits. 3. Check the ignition wires for cracking, hardness, or improper connections. Is the problem found? 1. Repair or replace any ignition system components as needed. 2. Perform an emission test. Did the vehicle pass the emission test? Action Were the Important Preliminary Checks performed? Go to Step 2 2 System OK Go to Step 3 Value(s) Yes No Go to "Important Preliminary Checks"
3
20 25 %
Go to Step 6 Go to "Diagnostic Aids for DTC P0172" Go to "Diagnostic Aids for DTC P0171"
Go to Step 4
4
Go to Step 5
6
Go to Step 7 System OK Go to Step 8
7
8
Go to Step 9 System OK
Go to Step 10
9
DAEWOO M-150 BL2
ENGINE CONTROLS 1F 301 Excessive Exhaust Emissions or Odors (Cont'd)
Step Action 1. Inspect for vacuum leaks. 2. Inspect the catalytic converter for contamination. 3. Inspect for carbon buildup on the throttle body and the throttle plate and inside the engine. Remove with a top engine cleaner. 4. Check the Electric Exhaust Gas Recirculation (EEGR) valve for not opening. 5. Check for proper Positive Crankcase Ventilation (PCV) operation. Are all checks and needed repairs complete? Value(s) Yes No
10
System OK
DAEWOO M-150 BL2
1F 302 ENGINE CONTROLS
DIESELING, RUN-ON
Definition: An engine continues to run after the ignition switch is turned OFF. Step 1 Does the engine run smoothly after the ignition switch is turned OFF? 1. Check the ignition switch and the ignition switch adjustment. 2. Replace the ignition switch if needed. Is the repair complete? 1. Check the evaporative emission system. 2. Check for leaking fuel injectors. 3. Check the Idle Air Control (IAC) valve operation. 4. Inspect for vacuum leaks. 5. Check for the proper base idle setting. Are all checks and repairs complete? Action Were the Important Preliminary Checks performed? Go to Step 2 2 Go to Step 3 Value(s) Yes No Go to "Important Preliminary Checks" Go to Step 4 System OK
3
4
System OK
DAEWOO M-150 BL2
ENGINE CONTROLS 1F 303
BACKFIRE
Definition: Fuel ignites in the intake manifold, or in the exhaust system, making a loud popping noise. Step 1 1. Inspect for crossed or crossfiring ignition wires. 2. Check the ignition system output voltage for all cylinders using a spark tester. 3. Inspect the spark plugs for excessive wear, burned electrodes, improper gap, or heavy deposits. Is the problem found? Repair or replace any ignition system components as needed. Is the repair complete? 1. Check the fuel system operation. 2. Check the fuel injectors by performing an injector diagnosis. Is the problem found? Repair or replace any fuel system components as needed. Is the repair complete? 1. Inspect the Electric Exhaust Gas Recirculation (EEGR) gasket for a leak or a loose fit. 2. Check the EEGR valve for proper operation. 3. Inspect the intake manifold and the exhaust manifold for a casting flash. Is the problem found? Repair or replace any components as needed. Is the repair complete? 1. Inspect the timing belt for proper installation and tension. 2. Check the engine compression. 3. Inspect the intake manifold gasket and the exhaust manifold gasket for leaks. 4. Check for sticking or leaking valves. 5. Repair or replace any components as needed. Are all checks and corrections complete? Action Were the Important Preliminary Checks performed? Go to Step 2 Important: Before diagnosing the symptom, check service bulletins for updates. Value(s) Yes No Go to "Important Preliminary Checks"
2
Go to Step 3 System OK Go to Step 5 System OK
Go to Step 4
3
4
Go to Step 6
5
6
Go to Step 7 System OK Go to Step 8
7
8
System OK
DAEWOO M-150 BL2
1F 304 ENGINE CONTROLS
REPAIR INSTRUCTIONS ON-VEHICLE SERVICE
FUEL PUMP
Tools Required
DW 140010A Fuel Pump Lock Ring Remover/Installer.
Removal Procedure
Caution: The fuel system is under pressure. To avoid fuel spillage and the risk of personal injury or fire, it is necessary to relieve the fuel system pressure before disconnecting the fuel lines. 1. Relieve the fuel system pressure. D Start the engine and remove the rear seat cushon (1). D Remove the fuel pump access cover (2). D Disconnect the fuel pump assembly electrical connector lock pin (3). D Disconnect the fuel pump assembly electrical connector (4). D Crank the engine for an additional 10 seconds.
D102F501
D102F502
2. Disconnect the fuel lines from the fuel pump. D Disconnect the fuel outlet line (1). D Disconnect the fuel tank return line (2).
D102F503
DAEWOO M-150 BL2
ENGINE CONTROLS 1F 305
3. Remove the fuel pump assembly from the tank. D Install the fuel pump lock ring remover/installer DW 140 010A. D Turn the fuel tank lock ring counterclockwise (1).
D12F504A
D Remove the fuel pump assembly (2). D Remove the fuel pump gasket (3).
D102F505
Installation Procedure
1. Install in the reverse order of removal. 2. Perform an operational check of the fuel pump. D Perform an operational check of the ignition switch ON the 2 seconds fuel pump operation.
D102F506
FUEL PRESSURE REGULATOR
Removal Procedure
Caution: The fuel system is under pressure. To avoid fuel spillage and the risk of personal injury or fire, it is necessary to relieve the fuel system pressure before disconnecting the fuel lines. 1. Relieve the fuel system pressure after remove the fuel pump assembly. Refer to "Fuel Pump" in this section.
D102F507
DAEWOO M-150 BL2
1F 306 ENGINE CONTROLS
2. Remove the fuel pressure regulator from the fuel pump. D Remove the retainer from the fuel pump assembly (1). D Remove the fuel pressure regulator (2). D Check the Oring seals for the damage or the rip. D Use a vacuum gauge to check the diaphram for damage and the spring for operation.
D102F508
Installation Procedure
1. Install in the reverse order of removal. D Do not reuse the removed Oring seals. Replace the removed Oring seals with the new ones.
D102F509
FUEL FILTER
Removal Procedure
Caution: The fuel system is under pressure. To avoid fuel spillage and the risk of personal injury or fire, it is necessary to relieve the fuel system pressure before disconnecting the fuel lines. 1. Relieve the fuel system pressure. Refer to "Fuel Pump" in this section. 2. Remove the fuel filter from the fuel tank. D Disconnect the inlet/outlet fuel lines by pushing the line connector lock and pulling off the hose of the fuel filter tube (1). D Remove the screw from the retaining clamp (2). D Remove the fuel filter (3).
D102F510
D102F511
DAEWOO M-150 BL2
ENGINE CONTROLS 1F 307 Installation Procedure
1. Install in the reverse order of removal. D Install the new fuel filter into the retaining clamp. Note the flow direction. D Connect the inlet/outlet lines. Secure the lines with the connector lock. D Perform a leak test of the fuel filter.
D102F512
FUEL TANK
Removal Procedure
Caution: The fuel system is under pressure. To avoid fuel spillage and the risk of personal injury or fire, it is necessary to relieve the fuel system pressure before disconnecting the fuel lines. 1. Relieve the fuel system pressure. Refer to "Fuel Pump" in this section. 2. Disconnect the fuel tank ventilation tube. D Disconnect the clamp (1). D Disconnect the ventilation tube (2). 3. Drain the fuel tank. D Place a pan below the fuel tank to catch the draining fuel. D Disconnect the fuel tank filter tube (1). D Drain the fuel from the fuel tank using the ventilation tube joint port (2). D Disconnect the evaporative emission canister line (3).
D102F513
D102F514
4. Remove the fuel filter. Refer to "Fuel Filter" in this section. 5. Install the jack to remove the fuel tank. D Install the jack on the center of the fuel tank. D Remove the strap bolts (1). D Remove the straps (2).
D12F515A
DAEWOO M-150 BL2
1F 308 ENGINE CONTROLS
6. Remove the fuel tank. D Lower slowly the jack to remove the fuel tank easily (1). D Disconnect the canister hose which is connected to the roll over valve from the fuel tank removed (2). D Inspect the fuel tank for clacks, damages, and contaminations. D Inspect the fuel lines for cracks and damages.
D102F516
Installation Procedure
1. Install in the reverse order of removal. D After the installation is complete, start the engine to prevent the vapor lock and check the hoses for leaks. 2. Install the fuel tank strap bolts.
Tighten
Tighten the fuel tank strap bolts to 1822 NSm (1316 lb-ft).
D12F517A
FUEL RAIL AND INJECTORS
Removal Procedure
Caution: The fuel system is under pressure. To avoid fuel spillage and the risk of personal injury or fire, it is necessary to relieve the fuel system pressure before disconnecting the fuel lines. 1. Relieve the fuel system pressure. Refer to "Fuel Pump" in this section. 2. Remove the canister from the engine room. Refer to "Evaporative Emission Canister" in this section. 3. Disconnect the fuel inlet line (1). 4. Disconnect the fuel injector harness connectors (2).
D102F518
D102F519
DAEWOO M-150 BL2
ENGINE CONTROLS 1F 309
5. Remove the fuel rail with the fuel injectors attached. D Remove the bolts (1). D Remove the fuel rail with the fuel injectors attached (2). Notice: Before removal, the fuel rail assembly may be cleaned with a spraytype cleaner, following package instructions. Do not immerse the fuel rails in liquid cleaning solvent. Use care in removing the fuel rail assembly to prevent damage to the electrical connectors and the injector spray tips. Prevent dirt and other contaminants from entering open lines and passages. Fittings should be capped and holes plugged during service.
D102F520
6. Remove the injectors from the fuel rail. D Remove the fuel injector retainer clips (1). D Remove the fuel injectors by pulling them down and out (2). D Discard the fuel injector Orings (3). Important: Different fuel injectors are calibrated for different flow rates. When ordering new fuel injectors, be certain to order the identical part number that is inscribed on the old fuel injector.
D102F521
Installation Procedure
1. Install in the reverse order of removal. Important: If a fuel injector becomes separated from the fuel rail and remains in the cylinder head, replace the fuel injector Oring seals and the retaining clip. D Lubricate the new fuel injector Orings with engine oil. Install the new Orings on the fuel injectors. 2. Install the fuel rail retaining bolts.
1822 NSm
Tighten
Tighten the fuel rail retaining bolts to 1822 NSm (1316 lb-ft).
D12F522A
3. Perform a leak check of the fuel rail and the fuel injectors.
EVAPORATIVE EMISSION CANISTER
Removal Procedure
Caution: Canister and vacuum hoses contain fuel vapors. Do not smoke in the area or permit an open flame. 1. Disconnect the negative battery cable. 2. Remove the canister. D Remove the bolt (1). D Remove the nut, then remove the cover (2).
MAA1F400
DAEWOO M-150 BL2
1F 310 ENGINE CONTROLS
D Disconnect the canister hoses (3). D Remove the evaporative emission casnister (4).
MAA1F410
Installation Procedure
1. Install in the reverse order of removal.
MAA1F420
EVAPORATIVE EMISSION CANISTER PURGE SOLENOID
1. Disconnect the negative battery cable. 2. Disconnectthe evaporative (EVAP) emission canister purge solenoid connector. 3. Disconnect the vacuum hoses from the EVAP canister purge solenoid. 4. Unclip the EVAP emission canister purge solenoid from the mounting bracket. 5. Installation should follow the removal procedure in the reverse order.
MAA1F430
MANIFOLD ABSOLUTE PRESSURE SENSOR
Removal Procedure
1. Disconnect the manifold absolute pressure (MAP) sensor connector and vacuum hose. D Disconnect the MAP connector (1). D Disconnect the vacuum hose from the MAP sensor (2).
MAA1F440
DAEWOO M-150 BL2
ENGINE CONTROLS 1F 311
2. Remove the MAP sensor. D Remove the bolts (1). D Remove the MAP sensor with bracket (2).
MAA1F450
Installatin Procedure
1. Install in the reverse order of removal. D Inspect the MAP sensor vacuum hose for the tear and damages. 2. Install the MAP sensor with the bolts and nuts.
Tighten
Tighten the MAP sensor bolts/nuts to 812 NSm (71106 lb-in). Tighten the MAP sensor bracket bolt to 812 NSm (71106 lb-in).
MAA1F460
THROTTLE BODY
Removal Procedure
1. Remove the air cleaner/resonator assembly and air intake tube. Refer to Section 1B, SOHC Engine Mechanical. 2. Drain the engine coolant. Refer to Section 1D, Engine Cooling.
D102F537
3. Disconnect the throttle cable, the throttle position sensor and the idle air control valve connectors. D Open the throttle valve (1). D Disconnect the throttle cable (2). D Disconnect the idle air control valve connector (3). D Disconnect the throttle position sensor connector (4).
D102F538
DAEWOO M-150 BL2
1F 312 ENGINE CONTROLS
4. Disconnect the coolant hoses and vacuum hoses from the throttle body. D Loosen the clamps from the coolant hoses (1). D Disconnect the coolant hoses from the throttle body (2). D Disconnect the vacuum hoses (3).
D102F539
5. Remove the throttle body from the intake manifold. D Remove the throttle body bolts (1). D Remove the throttle body (2). D Discard the throttle body gasket (3). D Inspect the throttle body gasket for the deformation and the damages.
D102F541
912 NSm
Installation Procedure
1. Install in the reverse order of removal. Important: Make sure the throttle control cable do not hold the throttle open. With the engine OFF, check to see that the accelerator pedal is free. 2. Install the throttle body with the bolts.
Tighten
Tighten the throttle body bolts to 912 NSm (80106 lb-in).
D12F542A
ENGINE COOLANT TEMPERATURE (ECT) SENSOR
Removal Procedure
1. Remove the engine coolant temperature (ECT) sensor. Refer to Section 1D, Engine Coolings.
D12F543A
DAEWOO M-150 BL2
ENGINE CONTROLS 1F 313 Installation Procedure
1. Install the engine coolant temperature sensor.
Tighten
Tighten the engine coolant temperature sensor to 812 NSm (71106 lb-ft).
D12F543B
INTAKE AIR TEMPERATURE (IAT) SENSOR
Removal Procedure
1. Disconnect the negative battery cable. 2. Remove the intake air temperature (IAT) sensor. D Disconnect the IAT sensor connector (1) D Disconnect the IAT sensor.
D102F544
Installation Procedure
1. Install in the reverse order of removal. 2. Install the IAT sensor.
Tighten
Tighten the IAT sensor to 2030 NSm (1522 lb-ft).
2030 NSm
D12F545A
DAEWOO M-150 BL2
1F 314 ENGINE CONTROLS
OXYGEN SENSOR (O2S1)
Removal Procedure
1. Remove the air cleaner/resonator assembly. Refer to Section 1B, SOHC Engine Mechanical. 2. Remove the oxygen sensor. D Disconnect the oxygen sensor connector (1). D Remove the oxygen sensor (2). Notice: The oxygen sensor uses a permanently attached pigtail and connector. This pigtail should not be removed from the oxygen sensor. Damage or removal of the pigtail or the connector could affect proper operation of the oxygen sensor. Take care when handling the oxygen sensor. Do not drop the oxygen sensor.
D102F546
Installation Procedure
1. Install in the reverse order of removal. Important: A special antiseize compound is used on the oxygen sensor threads. This compound consists of a liquid graphite and glass beads. The graphite will burn away, but the glass beads will remain, making the sensor easier to remove. New or service sensors will already have the compound applied to the threads. If a sensor is removed from any engine and if for any reason it is to be reinstalled, the threads must have antiseize compound applied before reinstallation.
D12F547A
2. Install the oxygen sensor.
Tighten
Tighten the oxygen sensor to 35~44 NSm (26~33 lbft).
HEATED OXYGEN SENSOR (HO2S2)
Removal and Installation Procedure
1. Disconnect the negative battery cable. 2. Remove the front center console. 3. Disconnect the HO2S2 connector. 4. Remove the front exhaust pipe. Refer to Section 1G, Engine Exhaust. 5. Remove the HO2S2 from the front exhaust pipe.
Installation Procedure
1. Install in the reverse order of removal.
MAA1F470
DAEWOO M-150 BL2
ENGINE CONTROLS 1F 315
Important: A special antiseize compound is used on the oxygen sensor threads. This compound consists of a liquid graphite and glass beads. The graphite will burn away, but the glass beads will remain, making the sensor easier to remove. New or service sensors will already have the compound applied to the threads. If a sensor is removed from any engine and if for any reason it is to be reinstalled, the threads must have antiseize compound applied before reinstallation. 2. Install the oxygen sensor.
Tighten
Tighten the oxygen sensor to 35~44 NSm (26~33 lbft).
EXHAUST GAS RECIRCULATION VALVE
Removal Procedure
1. Disconnect the negative battery cable. 2. Remove the air cleaner assembly. 3. Disconnect the electric exhaust gas recirculation (EEGR) valve connector.
MAA1F480
KNOCK SENSOR
Removal Procedure
1. Disconnect the negative battery cable. 2. Remove the starter. Refer to Section 1E, Engine Electrical. 3. Disconnect the electrical connector at the knock sensor (1).
D21F008
4. Remove the knock sensor. D Remove the knock sensor retaining bolt (1). D Remove the knock sensor.
D21F009
DAEWOO M-150 BL2
1F 316 ENGINE CONTROLS Installation Procedure
1. Install the knock sensor with the bolt.
Tighten
Tighten the knock sensor retaining bolt to 1525 NSm (1118 lb-ft). 2. Connect the electrical connector to the knock sensor. 3. Install the starter. Refer to Section 1E, Engine Electrical. 4. Connect the negative battery cable.
D21F010
ELECTRONIC IGNITION (EI) SYSTEM IGNITION COIL
Removal Procedure
1. Disconnect the negative battery cable. 2. Note the ignition wire location and disconnect the ignition wires from the EI system ignition coil. 3. Disconnect the EI system ignition coil connector. 4. Remove the EI system ignition coil retaining bolts. 5. Remove the EI system ignition coil.
MAA1F490
Installation Procedure
1. Install the EI system ignition coil. 2. Tighten the EI system ignition coil to 812 NSm (71106 lb-in).
MAA1F500
CRANKSHAFT POSITION (CKP) SENSOR
Removal Procedure
1. Disconnect the negative battery cable. 2. Remove the air cleaner assembly. 3. Disconnect the crankshaft position (CKP) sensor connector. 4. Remove the CKP sensor retaining bolt.
UAA1F2C0
DAEWOO M-150 BL2
ENGINE CONTROLS 1F 317 Installation Procedure
1. Install the CKP sensor. 2. Tighten the CKP sensor retaining bolt to 58 NSm (4471 lb-in).
MAA1F550
CAMSHAFT POSITION (CMP) SENSOR
Removal Procedure
1. Disconnect the negative battery cable. 2. Disconnect the camshaft position (CMP) sensor connector. 3. Remove the CMP sensor retaining bolt. 4. Remove the CMP sensor.
UAA1F2E0
Installation Procedure
1. Install the CMP sensor. 2. Tighten the CMP sensor retaining bolt to 1014 NSm (89124 lb-in).
MAA1F540
ENGINE CONTROL MODULE (ECM)
Removal Procedure
1. Disconnect the ECM connector.
MAA1F510
DAEWOO M-150 BL2
1F 318 ENGINE CONTROLS
2. Remove the ECM. D Remove the bolts. D Remove the ECM.
MAA1F520
Installation Procedure
1. Install in the reverse order of removal. Notice: If disconnecting the battery cable to the ECM, the IAC valve resetting should be proceeded. 2. install the ECM with the bolts.
Tighten
Tighten the ECM mounting bolts to 68 NSm (5371 lb-in).
MAA1F530
DAEWOO M-150 BL2
ENGINE CONTROLS 1F 319
SPECIFICATIONS
FASTENER TIGHTENING SPECIFICATIONS
Application Camshaft Position Sensor Bolts Engine Coolant Temperature (ECT) Sensor Crankshaft Position (CKP) Sensor Retaining Bolt Electronic Ignition (EI) System Ignition Coil Retaining Bolts Evaporative Emission Canister Protective Cover Electric Exhaust Gas Recirculation (EEGR) Valve Retaining Bolts Fuel Rail Retaining Bolts Fuel Tank Strap Retaining Nuts Knock Sensor Bolt Intake Air Temperature (IAT) Sensor Manifold Absolute Pressure (MAP) Sensor Retaining Bolt Oxygen Sensor Heated Oxygen Sensor Throttle Body Retaining Bolt ECM Mounting Bolts NSm 1014 812 58 812 8 2030 1822 1822 1525 2030 812 3544 3544 912 68 Lb-Ft 1522 1316 1316 1118 1522 2633 2633 Lb-In 89124 71106 4471 71106 71 71106 80106 5371
SPECIAL TOOLS
SPECIAL TOOLS TABLE
Scan Tool
DW140010A Fuel Pump Lock Ring Remover/Installer
D102F101
D12F102A
DAEWOO M-150 BL2
1F 320 ENGINE CONTROLS
ECM WIRING DIAGRAM (SIRIUS D3 1 OF 5)
MAA1F610
DAEWOO M-150 BL2
ENGINE CONTROLS 1F 321
ECM WIRING DIAGRAM (SIRIUS D3 2 OF 5)
MAA1F620
DAEWOO M-150 BL2
1F 322 ENGINE CONTROLS
ECM WIRING DIAGRAM (SIRIUS D3 3 OF 5)
MAAF630
DAEWOO M-150 BL2
ENGINE CONTROLS 1F 323
ECM WIRING DIAGRAM (SIRIUS D3 4 OF 5)
MAA1F640
DAEWOO M-150 BL2
1F 324 ENGINE CONTROLS
ECM WIRING DIAGRAM (SIRIUS D3 5 OF 5)
MAA1F650
DAEWOO M-150 BL2