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ENGINE CONTROL SYSTEM

SECTION

EC

CONTENTS
K9K DIESEL EQUIPMENT.............................................. 1 Cleanliness........................................................... 1 Special features ................................................... 4 Location of components ..................................... 11 DIESEL EQUIPMENT............................................ 15 Specifications ..................................................... 15 Diesel filter ......................................................... 18 High pressure pump........................................... 20 Flow actuator...................................................... 24 Fuel temperature sensor .................................... 27 Venturi ................................................................ 29 Injector rail.......................................................... 31 Pressure sensor ................................................. 36 Injectors.............................................................. 37 High pressure pipes ........................................... 41 ECM ................................................................... 45 DIESEL INJECTION .............................................. 47 Immobilizer function ........................................... 47 Idle speed adjustment ........................................ 48 Air conditioning control....................................... 50 Pre/postheating (glow plug) control.................... 52 DIESEL EQUIPMENT............................................ 53 Glow plugs ......................................................... 53 Engine coolant temperature ............................... 54 ANTI-POLLUTION................................................. 55 Oil vapour rebreathing........................................ 55 Exhaust gas recirculation (EGR) ....................... 56 DIESEL INJECTION ..............................................57 Trouble diagnosis - Introduction .........................57 Trouble diagnosis - ECM terminal ......................68 Trouble diagnosis - Summary table of DTC .......70 Trouble diagnosis - Introduction .........................72 DTC P0089 Common rail fuel pressure regulation function ..............................................73 DTC P0087 Fuel flow capacity function .............75 DTC P0110 IAT sensor.......................................76 DTC P0115 ECT sensor.....................................77 DTC P0180 Fuel temperature sensor circuit ......78 DTC P0190 FRP sensor .................................... 79 DTC P0200 Injector control circuit .....................80 DTC P0201 Injector circuit cylinder 1 ................. 82 DTC P0202 Injector circuit cylinder 2 ................. 84 DTC P0203 Injector circuit cylinder 3 ................. 86 DTC P0204 Injector circuit cylinder 4 ................. 88 DTC P0225 APP senser 1 .................................90 DTC P0231 Low pressure control circuit............92 DTC P0235 TC boost pressure sensor ..............93 DTC P0301 Cylinder 1 misfire............................94 DTC P0302 Cylinder 2 misfire............................95 DTC P0303 Cylinder 3 misfire............................96 DTC P0304 Cylinder 4 misfire............................97 DTC P0325 Knock sensor circuit ....................... 98 DTC P0335 CKP sensor (POS) .........................99 DTC P0340 CMP sensor.................................. 100 DTC P0380 Glow plug diagnostic connection .. 101

DTC P0382 Glow plug relay control circuit ...... 102 DTC P0400 EGR volume control solenoid valve circuit ........................................ 103 DTC P0403 EGR control circuit ....................... 104 DTC P0409 EGR position sensor .................... 105 DTC P0500 VSS .............................................. 106 DTC P0513 Immobiliser ................................... 107 DTC P0530 Refrigerant pressure sensor......... 108 DTC P0560 ECM supply voltage ..................... 109 DTC P0571 Brake switch circuit....................... 110 DTC P0604 ECM memory ................................111 DTC P0606 ECM ............................................. 112 DTC P0608 Sensor supply voltage .................. 114 DTC P0609 Supply voltage APP sensor 2....... 115 DTC P0685 ECM relay control......................... 117 DTC P2120 APP sensor 2 ............................... 118 DTC P2226 Atmospheric pressure sensor circuit .................................................... 120 DTC C001 CAN communication line................ 121 DIESEL INJECTION ............................................ 122 Trouble diagnosis States and parameter summary table .............. 122 DIESEL INJECTION ............................................ 123 Trouble diagnosis States and data monitor summary table .......... 123 Trouble diagnosis - Conformity check .............. 124 Trouble diagnosis Interpretation of parameters............................. 156 Trouble diagnosis - Interpretation of states ...... 157 Trouble diagnosis - Tests ................................. 158 Trouble diagnosis - Customer complaints ........ 171

Trouble diagnosis - Symptoms.........................173 Circuit diagram .................................................218 Wiring diagram Intake air temperature sensor ..........................220 Wiring diagram Engine coolant temperature sensor .................221 Wiring diagram - Fuel temperature sensor.......222 Wiring diagram Common rail fuel pressure sensor ...................223 Wiring diagram - Injector .................................. 224 Wiring diagram Accelerator pedal position sensor ....................226 Wiring diagram - Fuel flow actuator .................228 Wiring diagram TC boost pressure sensor ................................229 Wiring diagram Knock sensor (accelometer) ............................ 231 Wiring diagram Crankshaft position sensor...............................232 Wiring diagram Camshaft position sensor.................................233 Wiring diagram - Glow control system .............234 Wiring diagram - EGR control system ..............235 Wiring diagram Refrigerant pressure sensor.............................236 Wiring diagram Main power supply and ground circuit..............237 Wiring diagram - Brake switch .........................238 Wiring diagram - Temperature sensor ..............239 Wiring diagram - Cooling system ..................... 241 Wiring diagram - CAN communication line ......244 Wiring diagram - MI & data link connectors .....245

DIESEL EQUIPMENT Cleanliness DIESEL EQUIPMENT 1K9K Cleanliness

K9K

CLEANLINESS INSTRUCTIONS WHICH MUST BE FOLLOWED WHEN WORKING ON THE HIGH PRESSURE DIRECT INJECTION SYSTEM Risks relating to contamination The system is very sensitive to contamination. The risks caused by the introduction of contamination are: ­ damage or destruction of the high pressure injection system and the engine, ­ seizing or leaking of a component. All After-Sales operations must be performed under very clean conditions. This means that no impurities (particles a few microns in size) get into the system during dismantling or into the circuits via the fuel unions. The cleanliness principle must be applied from the filter to the injectors. WHAT ARE THE SOURCES OF CONTAMINATION? Contamination is caused by: ­ metal or plastic chips, ­ paint, ­ fibres: boxes, brushes, paper, clothing, cloths, ­ foreign bodies such as hair, ­ ambient air, ­ etc. IMPORTANT: It is not possible to clean the engine using a high pressure washer because of the risk of damaging connections. In addition, moisture may collect in the connectors and create electrical connection problems. INSTRUCTIONS TO BE FOLLOWED BEFORE ANY WORK IS CARRIED OUT ON THE INJECTION SYSTEM


Ensure that you have the plugs for the unions to be opened (bag of plugs sold at the Parts Stores - Nissan part No.: 16830 BN700, Renault part No.: 77 01 206 804). Plugs are to be used once only. After use, they must be thrown away (once used they are soiled and cleaning is not sufficient to make them reusable). Unused plugs must be thrown away. Ensure that you have hermetically resealable plastic bags for storing removed parts. Stored parts will therefore be less subject to the risk of impurities. The bags must be used only once, and after use they must be thrown away. Lint-free towelettes to be used for injection pump related service purpose. The use of a normal cloth or paper for cleaning purposes is forbidden. These are not lint-free and may contaminate the fuel circuit of the system. Each lint-free cloth should only be used once.





EC-K9K-1

DIESEL EQUIPMENT Cleanliness
INSTRUCTIONS TO BE FOLLOWED BEFORE OPENING THE FUEL CIRCUIT


K9K

For each operation, use new thinner (used thinner contains impurities). Pour it into a clean receptacle. For each operation, use a clean brush which is in good condition (the brush must not shed its bristles). Use a brush and thinners to clean the connections to be opened. Blow compressed air over the cleaned parts (tools, cleaned the same way as the parts, connections and injection system zone). Check that no bristles remain adhered. Wash your hands before and during the operation if necessary. When wearing leather protective gloves, cover these with latex gloves.



INSTRUCTIONS TO BE FOLLOWED DURING THE OPERATION


As soon as the circuit is open, all openings must be plugged to prevent impurities from entering the system. The plugs to be used are available from the Parts Stores - Nissan part No.: 16830 BN700, Renault part No.: 77 01 206 804. They must not, under any circumstances, be reused. Close the hermetically sealed bag, even if it has to be reopened shortly afterwards. Ambient air carries contamination. All components of the injection system that are removed must be stored in a hermetically sealed plastic bag once the plugs have been inserted. The use of a brush, thinner, bellows, sponge or normal cloth is strictly forbidden once the circuit has been opened. These items are likely to allow impurities to enter the system. A new component replacing an old one must not be removed from its packaging until it is to be fitted to the vehicle.









EC-K9K-2

DIESEL EQUIPMENT Cleanliness
Instructions For Fitting The Plugs Nissan part number: 16830 BN700 (Renault part number: 77 01 206 804)

K9K

MBIB0321E

CAUTION: The engine must not run with: ­ Diesel containing more than 10% diester ­ Petrol, even in very small amounts. 2 The system can inject the diesel into the engine at a pressure of up to 140,000 kPa (1,400 bar, 1,428 kg/cm , 20,300 psi). Before carrying out any work, check that the injector rail is no longer pressurized and that the fuel temperature is not too high. You must respect the cleaning and safety advice specified in this document for any work on the high pressure injection system.

EC-K9K-3

DIESEL EQUIPMENT Special features

K9K

The high pressure injection system is intended to deliver a specific quantity of diesel to the engine at a specific time. DESCRIPTION


DELPHI and type "DDCR" injection controlling 112 terminals ECM. The system consists of: a priming pump on the low pressure circuit, a diesel fuel filter, a high pressure pump incorporating a low pressure pump (transfer pump), a flow actuator attached to the pump, an injector rail, a pressure sensor located in the rail, four solenoid injectors, a fuel temperature sensor, an engine coolant temperature sensor, an intake (upstream) air temperature sensor, a camshaft position sensor (cylinder reference sensor), a turbocharger air pressure sensor, a knock sensor (accelerometer), an EGR solenoid valve, an accelerator pedal potentiometer, and an ECM. The "common rail" direct high pressure injection system works sequentially (based on the operation of multipoint injection for petrol engines). This new injection system reduces operating noise, reduces the volume of pollutant gases and particles and produces high engine torque at low engine speeds thanks to a pre-injection procedure. The high pressure pump generates the high pressure sent to the injector rail. The flow actuator on the pump controls the quantity of diesel engine fuel supplied according to the demand determined by the ECM. The rail supplies each injector through a steel pipe.

­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­






EC-K9K-4

DIESEL EQUIPMENT Special features


K9K

The ECM: ­ determines the value of injection pressure necessary for the engine to operate well and then controls the pressure regulator. It checks that the pressure value is correct by analysing the value transmitted by the pressure sensor located on the rail, ­ determines the injection time necessary to deliver the right quantity of diesel and the moment when injection should be started, ­ controls each injector electrically and individually after determining these two values.


­ ­ ­ ­ ­


The injected flow to the engine is determined by: the duration of injector control, the injector opening and closing speed, the needle travel (determined by a constant for the type of injector), the nominal hydraulic flow of the injector (unique to each injector), the high pressure rail pressure controlled by the ECM. The ECM controls: the idle speed adjustment, the exhaust gas flow reinjected into the inlet, the fuel supply control (advance, flow and rail pressure), the cooling fan control, the heat adjustment of the coolant circuit (thermoplungers), the glow plug (pre/post heating) control. The high pressure pump is supplied at low pressure by an integrated low pressure pump (transfer pump). It supplies the rail whose pressure is controlled for charge by the flow actuator and for discharging by the injector valves. Falls in pressure can be compensated for in this way. The flow actuator allows the high pressure pump to provide just the amount of diesel fuel necessary to maintain the pressure in the rail. Thanks to this element, heat generation is minimised and engine output improved. In order to discharge the rail using the injector valves, the valves are controlled by short electrical impulses: ­ short enough not to open the injector, (through the return circuit from the injectors), ­ long enough to open the valves and discharge the rail. The ECM controls the cooling fans and the coolant temperature warning light on the instrument panel.

­ ­ ­ ­ ­ ­




EC-K9K-5

DIESEL EQUIPMENT Special features
IMPORTANT The engine must not operate with: ­ diesel engine fuel containing more than 10% diester, ­ petrol, even in tiny quantities.


K9K

The system can inject the diesel into the engine at a pressure up to 1400 bars. Before carrying out any work, check that the injector rail is not under pressure and that the fuel temperature is not too high. You must respect the cleaning and safety advice specified in this document for any work on the high pressure injection system. Removal of the interior of the pump and injectors is prohibited. Only the flow actuator, the fuel temperature sensor and the venturi can be replaced. For safety reasons, it is strictly forbidden to slacken a high pressure pipe union when the engine is running. It is not possible to remove the pressure sensor from the fuel rail because this may cause circuit contamination problems. If the pressure sensor fails, the pressure sensor, the rail and the five high pressure pipes must be replaced. It is strictly forbidden to remove any injection pump pulley marked number 070 575. If the pump is being replaced, the pulley must be replaced. It is forbidden to repair the wiring connecting the knock sensor (accelerometer) and the CKP sensor (engine speed sensor). If the wiring should fail, it has to be replaced with new wiring. Applying 12 volts directly to any component in the system is prohibited. Ultrasonic carbon removal and cleaning are prohibited. Never start the engine without the battery being connected correctly. Disconnect the injection system ECM when carrying out any welding work on the vehicle. It is essential to replace all the disconnected air inlet plastic pipes.















EC-K9K-6

DIESEL EQUIPMENT Special features

K9K

There is a 16 digit code on the injectors called individual injector correction. This code is specific to each injector, and takes into account differences in manufacture and specifies the flow injected by each of them. When an injector is replaced, it is necessary to program the code of the new injector into the ECM. When an ECM is replaced, it is necessary to program the codes of the four injectors. There are two possibilities: If it is possible to communicate with the ECM: ­ read out the data from the ECM using the "SAVE DATA FOR REPLACE" in "WORK SUPPORT" mode with CONSULT-II ­ turn ignition switch OFF. ­ remove battery negative cable. ­ change the ECM ­ reprogram the data from the "WRITE DATA AFTER REPLACE" in "WORK SUPPORT" mode with CONSULTII to the replaced ECM ­ after replacement, ensure that the ECM has not detected malfunctions relating to the injector codes and check that the instrument panel warning light is off.


If it is not possible to communicate with the ECM: turn ignition switch OFF. remove battery negative cable. change the ECM read the data on the injectors Refer to EC-K9K-39 for individual injector correction value location. ­ enter the data in the ECM using the "ENTER INJCTR CALIB DATA" in "WORK SUPPORT" mode with CONSULT-II manually ­ reconfigure the different elements such as the power-assisted steering pump assembly and the thermoplungers etc. ­ using CONSULT-II, ensure that the ECM has not detected malfunctions relating to the injector codes and check that the instrument panel warning light is off.


­ ­ ­ ­

EC-K9K-7

DIESEL EQUIPMENT Special features
All the high pressure pipe removed must be systematically replaced along with the clips. TIGHTENING THE HIGH PRESSURE PIPES NOTE: fit the pump/rail pipe before the rail/injector pipes. Rail-pump pipe ­ Undo the rail, ­ Grease the threads of the high pressure pipe nuts, ­ Insert the high pressure pipe olive into the taper of the high pressure pump outlet, ­ Insert the high pressure pipe olive into the taper of the high pressure rail inlet. ­ Move the nut into position by hand, on the rail side then the pump side, ­ Tighten the rail, ­ Tighten the high pressure pipe nuts on the rail side then on the pump side. Rail/injector pipes

K9K

­ Undo the rail, ­ Grease the threads of the high pressure pipe nuts, ­ Insert the high pressure pipe olive into the taper of the high pressure injector inlet, ­ Insert the high pressure pipe olive into the taper of the high pressure rail outlet, ­ Move the nuts into position by hand, on the injector side then the rail side, ­ Tighten the rail, ­ Ensure that the new clip, supplied with the new high pressure pipe, is fitted, ­ Tighten the nuts of the high pressure pipes on the injector side first and then on the fuel rail side. NOTE: Before fitting a new high pressure pipe, move back the nuts on the pipe then lightly lubricate the nut threads with the oil from the sachet (1) provided in the parts kit.

EC-K9K-8

DIESEL EQUIPMENT Special features
CHECKING SEALING AFTER REPAIR After any operation, check that there are no diesel leaks. Reprime the circuit using the priming pump. Start the engine and allow to warm up at idle speed, visually inspecting for any fuel leaks. Apply tracing fluid around the high pressure connections of the pipe that has been replaced.

K9K

Once the engine coolant temperature is above 50°C and provided there are no malfunctions present, carry out a road test, taking the engine speed up to 4000 rpm at least once to check that there are no leaks. Perform a visual inspection after the road test to make sure that there are no high pressure leaks. Clean off the tracing fluid.

EC-K9K-9

DIESEL EQUIPMENT Special features
REPLACING THE ECM The system can be reprogrammed using CONSULT-II. Before an ECM is replaced in after-sales, the following must be done.


K9K

Check the individual correction value from "WORK SUPPORT" mode using print out function of CONSULT-II. After replacing ECM, enter each injector's individual correction value using "WORK SUPPORT" mode with CONSULT-II. Also set the system configuration using "CONFIGURATION" mode with CONSULT-II.



REPLACING THE INJECTORS NOTE: Individual injector correction is a factory calibration carried out on each injector to adjust the flow of each one precisely, taking into account differences in manufacture. The correction values are written on a label affixed to each injector then entered in the ECM which can then control each injector by taking account of their differences in manufacture. The system can be programmed "WORK SUPPORT" mode with CONSULT-II. The correction values (16 digit code) must be replaced after replacing an injector. (Refer to special features)


Entering each injector's individual correction value, when replacing the ECM.

EC-K9K-10

DIESEL EQUIPMENT Location of components

K9K

YEC670E

1. Fuel filter (LHD models) 2. Venturi 3. Fuel temperature sensor 4. EGR control solenoid valve 5. Injector 6. Turbocharger air temperature sensor 7. Turbocharger air pressure sensor 8. Fuel filter (RHD models) 9. Priming pump (RHD models) 10. Air cleaner 11. ECM

12. Camshaft position sensor 13. High pressure pump 14. Fuel flow actuator 15. Knock sensor (Accelerometer) 16. Spherical injector rail 17. Common rail fuel pressure sensor 18. Engine coolant temperature sensor 19. Intake air temperature sensor 20. Crankshaft position sensor 21. Glow relay (control) unit 22. IPDM E/R

EC-K9K-11

DIESEL EQUIPMENT Location of components

K9K

YEC671E

1. Fuel filter (LHD models) 2. Venturi 3. Fuel temperature sensor 4. EGR control solenoid valve 5. Injector 6. Turbocharger air temperature sensor 7. Turbocharger air pressure sensor 8. Fuel filter (RHD models) 9. Priming pump (LHD models) 10. Air cleaner 11. ECM

12. Camshaft position sensor 13. High pressure pump 14. Fuel flow actuator 15. Knock sensor (Accelerometer) 16. Spherical injector rail 17. Common rail fuel pressure sensor 18. Engine coolant temperature sensor 19. Intake air temperature sensor 20. Crankshaft position sensor 21. Glow relay (control) unit 22. IPDM E/R

EC-K9K-12

DIESEL EQUIPMENT Location of components
1 Camshaft position sensor 6 7 8 9 Injector Injector rail Rail pressure sensor Knock sensor (Accelerometer)

K9K

YEC630A

2 3 4 5

Fuel flow actuator Fuel temperature sensor High pressure pump Venturi

Models without intercooler

YEC631A

Models with intercooler

YEC672E

EC-K9K-13

DIESEL EQUIPMENT Location of components
10 11 12 13 14 Intake air temperature sensor Turbocharger air pressure sensor Turbocharger air temperature sensor EGR control solenoid valve Priming bulb (RHD models) 15 Fuel filter (RHD models) 16 Fuel filter (LHD models)

K9K

Models without intercooler

YEC633A

YEC632A

Models with intercooler

YEC634A

17 Engine coolant temperature sensor

YEC673E

YEC635A

18 IPDM E/R 19 ECM

YEC636A

EC-K9K-14

DIESEL1K9K EQUIPMENT Specifications

K9K
Emission control standard

Engines Vehicles Type Suffix Bore (mm, in) Stroke (mm, in) Displacement cm3 (cu in)

Compressi on ratio

Catalytic converter

K12

K9K

700

76 (2.99)

80.5 (3.17)

1,461 (89.15)

18.25/1

228

EU 00

ENGINE SPEED (rpm) IDLE SPEED 800 ± 50 900 or more* : without intercooler 875 or more* : with intercooler *: A/C ON Max. - no load Max. - under load

SMOKE OPACITY Homologation value Max. - legal

4500 ± 150

5000 ± 150

2.26 m-1 (60%)

3 m-1 (73%)

DESCRIPTION High pressure pump Fuel pump Common rail fuel pressure sensor Injectors

MARQUE/TYPE DELPHI DELPHI DELPHI DELPHI

SPECIAL NOTES 0 to 1400 bars continuous pressure Incorporated into the high pressure pump Incorporated into the rail Non measurable resistance Solenoid injector Maximum pressure 1400 bar Non measurable resistance Located on the high pressure pump Resistance: 5.3 ± 0.5 at 20ºC ECM (computer) (112 terminals) With pre-postheating function controlled by the ECM (computer) Resistance: Less than 1 connector disconnected Double track potentiometer Resistance: ­ terminals 1: 4 (earth) and 6 (+5 V): 1.7 ± 0.9 k ­ terminals 2: 5 (earth) and 3 (+5 V): 2.85 ± 2.0 k CTN thermistor Resistance: 5000 ± 6800 at - 40°C 9500 ± 900 at - 10°C 2051 ± 120 at 25°C 810 ± 47 at 50°C 310 ± 17 at 80°C

Diesel flow actuator ECM Pre/postheating unit (glow) Pre-heater plugs (glow) Accelerator pedal potentiometer (APP sensor)

DELPHI DELPHI NAGARES BED 7-12

BERU CTS

Intake air temperature sensors

JAEGER

EC-K9K-15

DIESEL EQUIPMENT Specifications
DESCRIPTION Fuel temperature sensor MARQUE/TYPE DELPHI SPECIAL NOTES Located on the high pressure pump CTN thermistor Resistance: 2.2 k at 25°C CTN thermistor Resistance: 76000 ± 7000 at - 40°C 12500 ± 1130 at - 10°C 2252 ± 112 at 25°C 810 ± 40 at 50°C 280 ± 8 at 80°C 115 ± 3 at 110°C 88 ± 2 at 120°C Variable reluctance sensor Resistance: 760 Built into the computer Resistance: ­ terminals A and B: 9 k ­ terminals A and C: 4 k ­ terminals B and C: 5 k

K9K

Engine coolant temperature sensor

ELTH

Crankshaft position (Engine speed) sensor Atmospheric pressure sensor Charge air (Turbocharger) pressure sensor

MGI DELPHI DELCO ELECTRONICS

Camshaft position sensor Knock sensor (accelerometer) Turbocharging air temperature and pressure sensor

SAGEM SAGEM BOSCH / LDF6T 20250

Hall effect sensor Non measurable resistance Pressure sensor with a negative temperature coefficient thermistor Supply voltage +5V Resistance between terminals 1 and 2: ­ 20,376 ± 1110.5 at -25°C ­ 15,614 ± 829 at -20°C ­ 9426 ± 475 at -10°C ­ 5887 ± 281.5 at 0°C ­ 3791 ± 172.5 at 10°C ­ 2511 ± 109 at 20°C ­ 1715.5 ± 71 at 30°C ­ 1200 ± 47 at 40°C ­ 851 ± 32 at 50°C ­ 612 ± 22 at 60°C ­ 446 ± 15 at 70°C ­ 330 ± 11 at 80°C 4-track connector: ­ 1: earth ­ 2: air temperature sensor signal ­ 3: +5V supply ­ 4: pressure sensor signal

EC-K9K-16

DIESEL1K9K EQUIPMENT Specifications
DESCRIPTION EGR solenoid valve EGR valve position potentiometer MARQUE/TYPE PIERBURG SPECIAL NOTES

K9K

Resistance: ­ terminals 4 and 6: 8 ± 0.5 at 25°C Incorporated into the EGR solenoid valve Resistance: ­ terminals 2 and 3: 1 ± 0.5 k at 20°C ­ terminals 1 and 2: 4 ± 1.6 k at 20°C

EC-K9K-17

DIESEL EQUIPMENT Diesel filter
IMPORTANT: Before carrying out any work, wait for the fuel temperature to drop.

K9K

REMOVAL - REFITTING Disconnect the battery. Remove fuel filter: RHD models After removing battery and air cleaner 15Fuel filter (RHD models)

MYEC633A

LHD models After removing front wipers, cowl top cover, front wiper motor assembly and cowl top panel/tray. Release the diesel fuel filter from its support. Fit the new diesel fuel filter (do not remove the plugs until the last moment). Disconnect all the snap fasteners beginning with the three vertical snap fasteners. Prevent the snap fasteners from coming into contact with the environment. Disconnect the pump outlet snap fastener last of all; reconnect it immediately when the new filter is installed. Reconnect the other snap fasteners. Prime the system using the priming bulb (automatic degassing). Reconnect the battery.

EC-K9K-18

DIESEL EQUIPMENT Diesel filter
16Fuel filter (LHD models)

K9K

MYEC634A

EC-K9K-19

DIESEL EQUIPMENT High pressure pump
IMPORTANT: It is strictly forbidden to remove any injection pump pulley marked number 070 575. If the pump is being replaced, the pulley must be replaced.

K9K

SPECIAL TOOLING REQUIRED Nissan No. Tool for removing and refitting high KV113E0010 pressure pipes (Mot. 1566) EQUIPMENT REQUIRED Low torque wrench High pressure pipe wrench (for example, Facom "DM19" wrench). Pipe socket for tightening the injector-rail high pressure pipes (for example, Facom Crowfoot 18-17 wrench). Pipe socket for tightening the pump-rail high pressure pipe (for example, Facom Crowfoot 19-17 wrench). TIGHTENING TORQUES (in daNm) High pressure pipe nuts Rail nuts Filler neck nut on the rail High pressure pump mounting bolts 3.8 2.8 ± 0.3 2.1 2.1 ± 2

IMPORTANT: Before carrying out any work, connect the CONSULT-II, set up communication with the ECM and check that the injection rail is not under pressure. Wait until the fuel temperature drops. Order the special high pressure injection circuit plug kit.

EC-K9K-20

DIESEL EQUIPMENT High pressure pump
REMOVAL YOU SHOULD FOLLOW THE CLEANNESS INSTRUCTIONS CLOSELY It is strictly forbidden to remove any injection pump pulley marked number 070 575 (see diagram). If the pump is being replaced, the pulley must be replaced.

K9K

The high pressure pump may be removed after having first removed the timing belt Disconnect the battery. Remove: ­ the neck (1) located on the fuel rail, ­ the dipstick guide and plug the hole. Undo the mounting nuts of the rail (2) a few turns.

EC-K9K-21

DIESEL EQUIPMENT High pressure pump
Carefully disconnect: ­ the connectors from the flow actuator (3) and fuel temperature sensor (4), ­ the pre-heater (glow) plugs and the injectors (5), ­ the return pipe (8) connecting the injector with the pump.

K9K

EC-K9K-22

DIESEL EQUIPMENT High pressure pump
Remove the high pressure pipe (9) connecting the pump to the rail. To do this: ­ undo the nut on the pump side then the nut on the rail side, ­ Move the nut along the tube keeping the olive in contact with the taper. Plug all the holes of the injection circuit. Remove the three mounting bolts (10) from the injection pump then remove it.

K9K

Refit the high pressure pipe, to do this: ­ remove the protective plugs, ­ insert the high pressure pipe olive into the taper of the high pressure pump outlet, ­ insert the high pressure pipe olive into the taper of the high pressure rail inlet. Finger tighten the nuts of the high pressure pipe starting with the one located on the rail side. Tighten the mounting bolts (10) on the high pressure pump to a torque of 2.1 daN.m. IMPORTANT: Do not touch the pipes with the wrench when torque tightening. Using the recommended tools, tighten the following in the order and to the torques shown: ­ the nut on the rail side to 3.8 daN.m, ­ the nut on the pump side to 3.8 daN.m, Tighten the rail mounting nuts to a torque setting of 2.8 daNm.

REFITTING Fit the pump then position the mounting bolts without tightening them. IMPORTANT: All the high pressure pipes removed must be systematically replaced. Before fitting the new high pressure pipe, lightly lubricate the nut threads with the oil from the sachet provided in the new parts kit. Refit in the reverse order to removal for the other refitting operations. Test the sealing of the high pressure after it has been repaired (refer to "Special features").

EC-K9K-23

DIESEL EQUIPMENT Flow actuator
EQUIPMENT REQUIRED Low torque wrench Pipe socket for tightening the high pressure pipe (for example, Facom Crowfoot 18-17 wrench).

K9K

TIGHTENING TORQUES (in daNm) Flow actuator mounting bolt 0.55 ± 0.06

IMPORTANT: Before carrying out any work, connect the CONSULT-II, set up communication with the ECM and check that the injection rail is not under pressure. Wait until the fuel temperature drops. Order the special high pressure injection circuit plug kit.

EC-K9K-24

DIESEL EQUIPMENT Flow actuator
REMOVAL YOU SHOULD FOLLOW THE CLEANNESS INSTRUCTIONS CLOSELY Disconnect the battery. Remove the engine cover. Disconnect the connector from the flow actuator (1) and from the fuel temperature sensor carefully (2).
With air cleaner removed

K9K

Unscrew the two retaining bolts from the bracket (4). Withdraw the flow actuator (by hand using small successive turns. Do not use the electrical connector as a lever arm). REFITTING Remove the new component from its packaging just before fitting it. NOTE: Do not lubricate the seals with grease or used diesel oil. Use the applicator provided in the kit for the new part. Position the actuator. (Important: when fitting the regulator, do not mark the seal.) Position the two mounting bolts then tighten them. Fit a new high pressure pipe to injector no. 4 plus a new clip (refer to high pressure pipes). Reconnect: ­ the diesel return pipe, ­ the electrical connectors.

YEC637A

Disconnect the fuel return pipe (3). Remove the high pressure pipe from injector no. 4 (refer to high pressure pipes). Plug the holes in the injection circuit. Disconnect the pre-heater plug and the injectors from cylinders 3 and 4.

EC-K9K-25

DIESEL EQUIPMENT Flow actuator
Refit in the reverse order to removal for the other refitting operations. Test the sealing of the high pressure circuit after it has been repaired (refer to "Special features").

K9K

EC-K9K-26

DIESEL EQUIPMENT Fuel temperature sensor
EQUIPMENT REQUIRED Low torque wrench

K9K

TIGHTENING TORQUES (in daNm) Fuel temperature sensor 1.5 ± 0.15

IMPORTANT: Before carrying out any work, connect the CONSULT-II, set up communication with the ECM and check that the injection rail is not under pressure. Wait until the fuel temperature drops. Order the special high pressure injection circuit plug kit.

EC-K9K-27

DIESEL EQUIPMENT Fuel temperature sensor
REMOVAL YOU SHOULD FOLLOW THE CLEANNESS INSTRUCTIONS CLOSELY Disconnect the battery. Remove the engine cover. Disconnect the connector from the fuel temperature sensor carefully (1). Undo then remove the fuel temperature sensor. REFITTING

K9K

Grease the O-ring with the lubricant from the sachet provided with the new part. Take care not to damage the O-ring when installing the sensor. Position the fuel temperature sensor then tighten to torque. Reconnect: ­ the electrical connector. ­ the battery. Test the sealing of the high pressure after it has been repaired (refer to "Special features").

EC-K9K-28

DIESEL EQUIPMENT Venturi
EQUIPMENT REQUIRED Low torque wrench

K9K

TIGHTENING TORQUES (in daNm) Venturi mounting bolts 0.55 ± 0.06

IMPORTANT: Before carrying out any work, connect the CONSULT-II, set up communication with the ECM and check that the injection rail is not under pressure. Wait until the fuel temperature drops. Order the special high pressure injection circuit plug kit.

EC-K9K-29

DIESEL EQUIPMENT Venturi
REMOVAL YOU SHOULD FOLLOW THE CLEANNESS INSTRUCTIONS CLOSELY Disconnect the battery. Remove the engine cover. Disconnect: ­ the fuel return pipe on the pump (1). ­ the return pipe (2) connecting the injector with the pump. Remove the venturi mounting bolts (3) then take it out. REFITTING

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Grease the O-ring with the lubricant from the sachet provided with the new part. Take care not to damage the O-ring when installing the venturi. Position the venturi then tighten it to torque. Reconnect the different pipes. Test the sealing of the high pressure circuit after it has been repaired (refer to "Special features").

EC-K9K-30

DIESEL EQUIPMENT Injector rail
SPECIAL TOOLING REQUIRED Nissan No. Tool for removing and refitting high KV113E0010 pressure pipes (Mot. 1566) EQUIPMENT REQUIRED Low torque wrench High pressure pipe wrench (for example, Facom "DM19" wrench). Pipe socket for tightening the injector-rail high pressure pipes (for example, Facom Crowfoot 18-17 wrench). Pipe socket for tightening the pump-rail high pressure pipe (for example, Facom Crowfoot 19-17 wrench).

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TIGHTENING TORQUES (in daNm) High pressure pipe nuts Rail nuts Filler neck nut on the rail 3.8 2.8 ± 0.3 2.1

IMPORTANT: Before carrying out any work, connect the CONSULT-II, set up communication with the ECM and check that the injection rail is not under pressure. Wait until the fuel temperature drops. Order the special high pressure injection circuit plug kit. IMPORTANT: The pressure sensor cannot be separated from the rail.

EC-K9K-31

DIESEL EQUIPMENT Injector rail
REMOVAL YOU SHOULD FOLLOW THE CLEANNESS INSTRUCTIONS CLOSELY Disconnect the battery. Remove the engine cover. Carefully disconnect: ­ the connectors from the flow actuator (1), ­ the connectors from the fuel temperature sensor (2), ­ the injector connectors (3), ­ the glow (heater) plugs, ­ on the pump, the fuel supply (4) and return (5) pipes. ­ the return pipe (6) connecting the injectors with the pump.

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Remove: ­ the neck (7) located on the fuel rail, ­ the dipstick guide and plug the hole. Disconnect the pressure sensor connector from the rail (8).

EC-K9K-32

DIESEL EQUIPMENT Injector rail
Remove the clips connecting the high pressure pipes. IMPORTANT: When undoing the high pressure pipes, it is essential to maintain the central union of the injector (9). Remove all the high pressure pipes (12). Plug all the holes in the injection circuit. Remove the rail (13).

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IMPORTANT: Do not damage the injector's leak return duct (10).

Undo the mounting nuts of the rail (11) a few turns. NOTE: Undo the nut on the pump side or the injector side, then the nut located on the rail side. Undo the nuts for each pipe in turn. Move the nut along the pipe keeping the olive in contact with the taper.

EC-K9K-33

DIESEL EQUIPMENT Injector rail
REFITTING IMPORTANT: All the high pressure pipes removed must be replaced as a matter of course. Fit a new high pressure rail on the studs. Finger tighten the nuts. Before fitting the new high pressure pipes, lightly lubricate the nut threads with the oil from the sachet provided in the new parts kit. NOTE: Fit the pump/rail pipe before the rail/injector pipes. Fit the pump-rail high pressure pipe: ­ remove the protective plugs from the high pressure pump outlet, the high pressure rail inlet and the pipe. ­ insert the high pressure pipe olive into the taper of the high pressure pump outlet, ­ insert the high pressure pipe olive into the taper of the high pressure rail inlet. ­ finger tighten the nuts of the high pressure pipe starting with the one located on the rail side. Fit the rail-injector high pressure pipe: IMPORTANT: When tightening the high pressure pipes, it is essential to maintain the central union of the injector (10).

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­ remove the protective plugs from the high pressure rail outlet, the injector high pressure inlet and the pipe. ­ insert the high pressure pipe olive into the taper of the high pressure injector inlet, ­ insert the high pressure pipe olive into the taper of the high pressure rail outlet. ­ finger tighten the nuts of the high pressure pipe starting with the one located on the injector side. Fit the remaining high pressure pipes as you did previously. NOTE: The order in which the pipes are installed is not important. Fit the clips supplied with the new pipes onto the high pressure pipes: ­ Insert the first half of the clip using adjustable pliers, ­ Insert the second half of the clip using adjustable pliers. IMPORTANT: Pay attention to the direction of installation of the second clip. The tabs located in the centre of the clip will only fit together in one position.

EC-K9K-34

DIESEL EQUIPMENT Injector rail
Tighten the rail nuts to a torque of 2.8 daNm. IMPORTANT: Do not touch the pipes with the wrench when torque tightening. IMPORTANT: Follow the order and tightening torque of the high pressure pipes. Using the recommended tools, tighten the nuts on the rail - pump high pressure pipe: ­ tighten the nut on the rail side to a torque of 3.8 daN.m. ­ tighten the nut on the pump side to a torque of 3.8 daN.m.

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Using the recommended tools, tighten the nuts on the rail - injector high pressure pipes: ­ tighten the nut on the injector side to a torque of 3.8 daN.m. ­ tighten the nut on the rail side to a torque of 3.8 daN.m. NOTE: Tighten one pipe fully before moving on to the next pipe.

Refit in the reverse order to removal for the other refitting operations. Test the sealing of the high pressure after it has been repaired (refer to "Special features").

EC-K9K-35

DIESEL EQUIPMENT Pressure sensor
The pressure sensor (1) cannot be separated from the fuel rail. If the pressure sensor malfunctions, the pressure sensor assembly - rail and high pressure pipes - must be replaced (refer to fuel rail section).

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EC-K9K-36

DIESEL EQUIPMENT Injectors
SPECIAL TOOLING REQUIRED Nissan No. Tool for removing and refitting high KV113E0010 pressure pipes (Mot. 1566) EQUIPMENT REQUIRED Low torque wrench High pressure pipe wrench (for example, Facom DM19 wrench). Pipe socket for tightening the injector-rail high pressure pipes (for example, Facom Crowfoot 18-17 wrench). Pipe socket for tightening the pump-rail high pressure pipe (for example, Facom Crowfoot 19-17 wrench).

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TIGHTENING TORQUES (in daNm) High pressure pipe nuts Rail nuts Injector mounting Filler neck nut on the rail 3.8 2.8 ± 0.3 2.8 ± 0.3 2.1

IMPORTANT: Before carrying out any work, connect the CONSULT-II, set up communication with the ECM and check that the injection rail is not under pressure. Wait until the fuel temperature drops. Order the special high pressure injection circuit plug kit. IMPORTANT: It is forbidden to open an injector. If you open an injector by mistake, you will have to change it. This is because of the manufacturing and installation tolerances and because there is a risk of contaminating the inside of the injector. The rod filter of the injector must not be removed.

EC-K9K-37

DIESEL EQUIPMENT Injectors
REMOVAL NOTE: It is possible to replace a single high pressure pipe. YOU SHOULD FOLLOW THE CLEANNESS INSTRUCTIONS CLOSELY Disconnect the battery. Remove: ­ the engine cover, ­ the neck (1) located on the high pressure rail, ­ the dipstick guide then plug the hole. Undo the mounting nuts of the rail (2) a few turns. Disconnect: ­ the fuel return pipe (3), ­ the injector electrical connector.

K9K

Remove the clip (4) connecting the high pressure pipes.

IMPORTANT: When undoing the high pressure pipes, it is essential to maintain the central union of the injector (5).

Undo the nut on the injector side, then the nut located on the rail side of the high pressure pipe. Move the nut along the tube keeping the olive in contact with the taper.

IMPORTANT: Do not damage the injector's leak return duct (6).

EC-K9K-38

DIESEL EQUIPMENT Injectors
REFITTING

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NOTE: Read the 16 digit code on the new injector before refitting it and programming the code into the ECM using the CONSULT-II (see section "Special features, Replacing injectors"). The code is unique to each injector, it specifies the flow. Clean the injector sockets and the injector bodies, as well as their brackets using a lint-free cloth (use the wipes recommended for this purpose, dipped in clean solvent. Dry off using a different new wipe. Replace the flameshield washer with a new one. Position the injector. Tighten its mounting clamp to a torque of 2.8 daN.m. * 16 digit code Remove the high pressure pipe (7). Disconnect the diesel return pipe on the injector. Plug all the holes of the injection circuit. Unscrew the injector bracket (8). Remove the injector. Pull off the flameshield washer. IMPORTANT: All the high pressure pipes removed must be systematically replaced.

Before fitting the new high pressure pipe, lightly lubricate the nut threads with the oil from the sachet provided in the new parts kit.

EC-K9K-39

DIESEL EQUIPMENT Injectors
Fit the high pressure pipe: ­ remove the protective plugs from the rail, the injector inlet and the pipe. ­ insert the high pressure pipe olive into the taper of the injector inlet, ­ insert the high pressure pipe olive into the taper of the rail outlet. Move the nut into position by hand, injector side first then the rail side. Fit a new clip supplied with the new pipes onto the high pressure pipes: ­ Insert the first half of the clip using adjustable pliers, ­ Insert the second half of the clip using adjustable pliers. IMPORTANT: Pay attention to the direction of installation of the second clip. The tabs located in the centre of the clip will only fit together in one position.

K9K

Tighten the rail nuts to a torque of 2.8 daNm. IMPORTANT: Do not touch the pipes with the wrench when torque tightening.

IMPORTANT: When tightening the high pressure pipes, it is essential to maintain the central union of the injector.

Using the recommended tools, tighten the following in the order and to the torques shown: ­ the nut on the injector side to a torque of 3.8 daN.m. ­ the nut on the rail side to a torque of 3.8 daN.m.

Refit in the reverse order to removal for the other refitting operations. Test the sealing of the high pressure after it has been repaired (refer to "Special features").

EC-K9K-40

DIESEL EQUIPMENT High pressure pipes
SPECIAL TOOLING REQUIRED Nissan No. Tool for removing and refitting high KV113E0010 pressure pipes (Mot. 1566) EQUIPMENT REQUIRED Low torque wrench High pressure pipe wrench (for example, Facom DM19 wrench). Pipe socket for tightening the injector-rail high pressure pipes (for example, Facom Crowfoot 18-17 wrench). Pipe socket for tightening the pump-rail high pressure pipe (for example, Facom Crowfoot 19-17 wrench).

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TIGHTENING TORQUES (in daNm) High pressure pipe nuts Rail nuts Filler neck nut on the rail 3.8 2.8 ± 0.3 2.1

IMPORTANT: Before carrying out any work, connect the CONSULT-II, set up communication with the ECM and check that the injection rail is not under pressure. Wait until the fuel temperature drops. Order the special high pressure injection circuit plug kit.

EC-K9K-41

DIESEL EQUIPMENT High pressure pipes
REMOVAL NOTE: It is possible to replace a single high pressure pipe. YOU SHOULD FOLLOW THE CLEANNESS INSTRUCTIONS CLOSELY Disconnect the battery. Remove: ­ the engine cover, ­ the neck (1) located on the high pressure rail, ­ the dipstick guide then plug the hole. Undo the mounting nuts of the rail (2) a few turns.

K9K

Undo the nut on the pump side or the injector side, then the nut located on the rail side. Move the nut along the tube keeping the olive in contact with the taper. IMPORTANT: Do not damage the injector's leak return duct (5).

Remove the clip (3) connecting the high pressure pipes. IMPORTANT: When undoing the high pressure pipes, it is essential to maintain the central union of the injector (4).

EC-K9K-42

DIESEL EQUIPMENT High pressure pipes
Remove the high pressure pipe(s). Plug all the holes of the injection circuit. REFITTING NOTE: Fit the pump/rail pipe before the rail/injector pipes. Before fitting the new high pressure pipes, lightly lubricate the nut threads with the oil from the sachet provided in the new parts kit. Fit the pump-rail high pressure pipe: ­ remove the protective plugs from the high pressure pump outlet, the high pressure rail inlet and the pipe. ­ insert the high pressure pipe olive into the taper of the high pressure pump outlet, ­ insert the high pressure pipe olive into the taper of the high pressure rail inlet. ­ finger tighten the nuts of the high pressure pipe starting with the one located on the rail side. Fit the rail-injector high pressure pipe: ­ remove the protective plugs from the high pressure rail outlet, the injector high pressure inlet and the pipe. ­ insert the high pressure pipe olive into the taper of the high pressure injector inlet, ­ insert the high pressure pipe olive into the taper of the high pressure rail outlet, ­ finger tighten the nuts of the high pressure pipe starting with the one located on the injector side.

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Fit the remaining high pressure pipes as you did previously.

IMPORTANT: All the high pressure pipes removed must be systematically replaced.

Fit a new clip supplied with the new pipes onto the high pressure pipes: ­ insert the first half of the clip using adjustable pliers, ­ insert the second half of the clip using adjustable pliers.

IMPORTANT: Pay attention to the direction of installation of the second clip. The tabs located in the centre of the clip will only fit together in one position.

EC-K9K-43

DIESEL EQUIPMENT High pressure pipes
Tighten the rail nuts to a torque of 2.8 daN.m.

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NOTE: Tighten one pipe fully before moving on to the next pipe.

IMPORTANT: Do not touch the pipes with the wrench when torque tightening.

Using the recommended tools, tighten the following in the order and to the torques shown: ­ the nut on the pump - rail high pressure pipe starting with the one located on the rail side to a torque of 3.8 daN.m. ­ the nut on the pump side to a torque of 3.8 daN.m.

Refit in the reverse order to removal for the other refitting operations. Test the sealing of the high pressure after it has been repaired (refer to "Special features").

IMPORTANT: When tightening the high pressure pipes, it is essential to maintain the central union of the injector (4). Using the recommended tools, tighten the following in the order and to the torques shown: ­ the nut on the injector side to a torque of 3.8 daN.m. ­ the nut on the rail side to a torque of 3.8 daN.m.

EC-K9K-44

DIESEL EQUIPMENT ECM

K9K

NOTE: When replacing an ECM, it is necessary to program the individual injector correction and the other vehicle configurations using CONSULT-II. REPLACING THE ECM Before an ECM is replaced in after-sales, the following must be checked using CONSULT-II:


Injectors individual correction value (16 digit code) System configulation

EC-K9K-45

DIESEL EQUIPMENT ECM
REMOVAL Disconnect: ­ the battery, ­ the ECM harness connectors. Remove the mounting nuts from the ECM (19). Reconnect the ECM. Connect the battery. REFITTING

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Fit the new ECM, taking care to engage the positioning tab, then fit the ECM on its mounting studs. Tighten the ECM mounting nuts.

Turn the engine on and read the DTC using the CONSULT-II. If necessary repair the DTC that appear then clear them. Check that the vehicle is operating correctly.
YEC636A

EC-K9K-46

DIESEL INJECTION Immobilizer function
This vehicle is fitted with an engine immobilizer system which is controlled by a key recognition system. REPLACING THE ECM The ECM are supplied without a code but they must all be programmed with one.

K9K

If an ECM is replaced, it must be programmed with the code of the vehicle and the correct operation of the engine immobilizer function must be checked. (Refer to BL section.)

WARNING: These vehicles have a special ECM which does not function unless it is coded. Consequently, it is strongly recommended that you do not carry out tests using ECMs borrowed from the warehouse or on another vehicle to prevent coding and uncoding problems which may leave the ECM useless.

UNCODING PROCEDURE If the ECM has learnt a code and must be returned to the workshop it is imperative that you uncode it before removing it. (See the repair manual or the engine immobilizer TSB).

EC-K9K-47

DIESEL INJECTION Idle speed adjustment

K9K

The ECM takes over calculation of the idle speed to maintain the idle speed at the recommended level and to compensate for any variation in the mechanical or electrical couple as regards: ­ the engine coolant temperature, ­ battery voltage, ­ the gear selected on the transmission, ­ the electrical consumers (climate control system, cooling fan assembly etc.), ­ any malfunctions found. At the engine operating temperature, without high electrical consumer, the idle speed is 850 rpm. IDLE SPEED CORRECTION ACCORDING TO ENGINE COOLANT TEMPERATURE

X. Engine speed in rpm Y. Temperature in °C

SPEED ADJUSTMENT WHEN THERE IS AN ACCELERATOR PEDAL POSITION SENSOR (POTENTIOMETER) MALFUNCTION


If one or both terminals of the accelerator pedal position sensor (potentiometer) are suspected, the ECM overrides the idle speed to maintain it at 1100 rpm. This defect mode limits performance. The orange injection warning light lights up and flashes. If the accelerator pedal position sensor (potentiometer) is blocked, is no longer being supplied, or is not transmitting an output signal, the ECM overrides the idle speed to maintain it at 1300 rpm. This mode limits performance. The orange injection warning light lights up and flashes. In both cases, when the brake pedal is depressed, the idle speed is stabilised at the recommended speed. If the information from the accelerator pedal position sensor (potentiometer) and the brake switch information does not correspond, the speed is changed to 1100 rpm.





EC-K9K-48

DIESEL INJECTION Idle speed adjustment
IDLE SPEED ADJUSTMENT WHEN THERE IS AN INJECTOR CODE MALFUNCTION

K9K

When there is an injector code malfunction, the ECM overrides the idle speed to maintain it at 1300 rpm. This mode limits performance. The orange injection warning light lights up and flashes. CORRECTION OF THE IDLING SPEED ACCORDING TO THE GEAR RATIOS The idling speed is modified according to the gear selected in the transmission: ­ in neutral, 1st and 2nd gear, the speed is (at the engine operating temperature) 850 rpm (graph A), ­ for the other gears, the speed is (at the engine operating temperature) 900 rpm (graph B).

X. Engine speed in rpm Y. Temperature in °C

EC-K9K-49

DIESEL INJECTION Air conditioning control
AIR CONDITIONING CONTROL The compressor is a variable displacement type. The air conditioning relays are controlled by wires: COMPRESSOR OPERATION PROGRAMMING During certain stages of operation, the ECM stops the compressor from functioning. Engine starting program The compressor is prevented from operating for 4 seconds after the engien has started. Thermal protection program

K9K

The compressor is not engaged when the engine temperature is higher than 115 °C or from 110 °C at high speed, 4500 rpm for more than 3 seconds. Fan assembly control programming At idling speed and also when driving, with the air conditioning activated, the speed of the fan assembly is determined according to the refrigerant fluid pressure and the vehicle speed.

EC-K9K-50

DIESEL INJECTION Air conditioning control
Recovery of performance

K9K

When pressure is applied to the accelerator pedal above 70%, the compressor is disengaged for 5 seconds. Recovery of output when the vehicle starts moving In order to help the vehicle move off, the air conditioning compressor is disengaged if the position of the accelerator pedal is above 35 % and the idling speed less than 1250 rpm. Anti-stall protection The compressor is disengaged if the engine speed is lower than 750 rpm. Engine overspeed timed protection program The compressor is disengaged when the speed reaches 4500 rpm for more than 3 seconds. NOTE: The time between the compressor being disengaged twice is always greater than 10 seconds.

EC-K9K-51

DIESEL INJECTION Pre/postheating (glow plug) control
The pre/postheating function is controlled by the preheating unit. PRE/POSTHEATING (glow plug) OPERATING PRINCIPLE 1) Ignition on "preheating" a) Variable preheating The time period for the warning light to light up and the feed to heater plugs depends on the coolant temperature and the battery voltage. 2)

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"Post heating" with the engine running

During this phase the plugs are supplied continuously according to engine coolant temperature.

X. Time in seconds Y. Temperature in °C For idle speed without pressing the accelerator pedal. X. Time in seconds Y. Temperature in °C Whatever the situation, the preheating warning light cannot be lit for more than 15 seconds (except in the event of an engine coolant temperature sensor malfunction). b) Fixed preheating After the warning light goes out the plugs remain supplied for a fixed period of 5 seconds.

EC-K9K-52

DIESEL EQUIPMENT Glow plugs
The resistance of a glow plug is 0.6 . TIGHTENING TORQUE (in daNm) Glow plug 1.5

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Plugs may be removed without having to open the high pressure circuit. REMOVAL Disconnect the battery. Unclip the plug connector. Clean the outside of the plug to avoid any dirt entering the cylinder. Loosen and remove the plugs.

To undo the plug on cylinder 4 use a 10 mm long radio socket attached to a universal joint. Once the plug is loosened use a hose to unscrew it completely. REFITTING Proceed in the reverse order to removal.

EC-K9K-53

DIESEL EQUIPMENT Engine coolant temperature
The cooling fan unit is controlled by the ECM. COOLING FAN ASSEMBLY OPERATION WITH THE ENGINE RUNNING The cooling fan assembly is controlled:


K9K

at slow speed if the engine coolant temperature exceeds 99°C or if there is an engine coolant temperature sensor malfunction, and is switched off when the temperature falls below 96°C. at high speed if the engine coolant temperature exceeds 102°C or if there is a low speed malfunction, and is switched off when the temperature falls below 99°C.



The cooling fan assembly low and high speeds are controlled when the air conditioning function is selected on the instrument panel. If the low speed setting is suspected, the high speed setting operates under the low speed conditions. OPERATION OF THE ENGINE COOLANT TEMPERATURE WARNING LIGHT The engine coolant temperature warning light remains lit if the engine coolant temperature exceeds 114°C. It goes out when the temperature falls below 111°C.

EC-K9K-54

ANTI-POLLUTION 1K9K Oil vapour rebreathing
CIRCUIT DIAGRAM A.

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When there is a low charge, the vacuum in the air intake duct is below the spring set point. The oil vapours are extensively rebreathed by the vacuum in the air intake duct. When there is a medium or high charge, the pressure in the air intake duct exhausts the valve diaphragm, the oil vapours are breathed in small quantities via a calibrated hole.

B.

CHECKING To ensure the correct operation of the anti-pollution system, the oil vapour rebreathing circuit must be kept clean and in good condition.

1 2 3 4 5 Pa

Cylinder head cover Oil vapour rebreathing duct Oil vapour recirculation valve Air inlet duct Turbocharger Atmospheric pressure

EC-K9K-55

ANTI-POLLUTION Exhaust gas recirculation (EGR)
CIRCUIT DIAGRAM

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1 2 3 4 5 6 7 A B

Engine Air filter unit Air distributor Exhaust manifold EGR unit with solenoid valve Turbocharger ECM Air inlet Exhaust gas outlet

PURPOSE OF THE EGR SYSTEM Exhaust gas recirculation is used to reduce the nitrogen oxide (NOx) content of the exhaust gases. The ECM authorises gas to pass by controlling a solenoid valve.

EC-K9K-56

1K9K

DIESEL INJECTION Trouble diagnosis - Introduction

K9K

1. SCOPE OF THIS DOCUMENT This document presents the trouble diagnosis method applicable to all ECMs with the following specifications: Vehicle(s): K12 with K9K Function concerned: DELPHI K9 DIESEL DIRECT COMMON RAIL INJECTION (DDCR) Name of ECM: DDCR INJECTION Program No.: BE 88 VDIAG No.: 44

2. PREREQUISITES FOR TROUBLE DIAGNOSIS To begin trouble diagnosis, it is essential to have the following items available: Documentation type Diagnostic procedures: ­ Assisted with CONSULT-II, Service Manual. ­ Wiring diagrams. Specia tool required PLUGGED RAIL tools 3. REMINDERS Trouble diagnosis: There are present DTCs and stored DTCs (which appeared in a certain context and have since disappeared or which are still present but have not had trouble diagnosis performed on them in the current context). The "present" or "stored" status of DTCs must be considered when activating the diagnostic tool after power is supplied to the ECM (without activating the system components). Deal with present DTCs according to the procedure specified in the corresponding DTC trouble diagnosis.

EC-K9K-57

DIESEL INJECTION Trouble diagnosis - Introduction
For stored DTCs, note the DTCs displayed and follow the instructions in the Notes section.

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If the DTC is confirmed when the instructions in the Notes section are applied, the malfunction is present. Deal with the DTC. If the DTC is not confirmed, check: ­ the electrical lines which correspond to the malfunction, ­ the connectors for these lines (for oxidation, bent pins, etc.), ­ the resistance of the malfunction component, ­ the condition of the wires (melted or cut insulation, wear). Conformity check The conformity check is designed to check the states and data monitor items which do not display any DTCs on the diagnostic tool when inconsistent. This phase therefore allows: ­ diagnoses malfunctions that do not have a DTC display, and which may correspond to a customer complaint. ­ Checks that the system is operating correctly and that there is no risk of a DTC reappearing after repairs. This section gives the trouble diagnosis procedures for states and parameters and the conditions for checking them. If a state is not operating normally or a data monitor value is outside permitted tolerance values, you should consult the corresponding trouble diagnosis page. Customer complaints - trouble diagnosis If the test with the CONSULT-II is OK, but the customer complaint still present, the malfunction should be treated by customer complaints.

A synopsis of the general procedure to follow is provided on the next page in the form of a flow chart.

EC-K9K-58

DIESEL INJECTION Trouble diagnosis - Introduction
4. DIAGNOSTIC PROCEDURE Check the battery charge and condition of the fuses

K9K

Connect CONSULT-II

Communicate with ECM? YES Read DTCs

NO

See CHART 1 Refer to Trouble diagnosis Customer complaints

NO DTC exists YES Dealing with DTCs found The symptom exists NO Malfunction solved Checking correct operation

Dealing with stored DTCs Use the DTC confirmation charts The symptom exists YES NO Malfunction solved The symptom exists

NO

Malfunction solved

Replace ECM

EC-K9K-59

DIESEL INJECTION Trouble diagnosis - Introduction
5. SAFETY INSTRUCTIONS All work on components requires that the safety rules be obeyed to prevent damage or injury: ­ Make sure the battery is properly charged to avoid damaging the ECMs with a low charge. ­ Use the proper tools.

K9K

Cleanliness instructions which must be followed when working on the high-pressure direct injection system: Risks relating to contamination: The system is very sensitive to contamination. The risks caused by the introduction of contamination are: damage to or destruction of the high-pressure injection system and the engine, seizing or incorrect sealing of a component. All After-Sales operations must be performed under very clean conditions. This means that no impurities (particles a few microns in size) get into the system during dismantling or into the circuits via the fuel unions. The cleanliness guidelines must be applied from the filter through to the injectors. - What are the sources of contamination? Contamination is caused by: ­ metal or plastic chips, ­ paint, ­ fibres from: cardboard, brushes, paper, clothing, cloths. ­ foreign bodies such as hair, ­ ambient atmosphere, ­ etc. WARNING: Before working on the injection system, ensure that the system pressure is nearing 0 bar. CAUTION: it is not possible to clean the engine using a high-pressure washer because of the risk of damaging the connections. In addition, moisture may collect in the connectors and cause electrical connection malfunctions.

EC-K9K-60

DIESEL INJECTION Trouble diagnosis - Introduction
5. SAFETY INSTRUCTIONS (CONTINUED):

K9K

Instructions to be followed before any work is carried out on the injection system: Ensure that you have the plugs for the unions to be opened (bag of plugs available from the Parts Stores, NISSAN part No:16830 BN700, Renault part No: 77 01 206 804). Plugs are to be used once only. After use, they must be thrown away (once used they are soiled and cleaning is not sufficient to make them reusable). Unused plugs must be thrown away. Ensure that you have hermetically resealable plastic bags for storing removed parts. There is less risk of parts stored in this way being exposed to contamination. The bags must be used only once, and after use they must be thrown away. Ensure that lint-free towelettes are used for injection pump related service purposes. The use of a normal cloth or paper for cleaning purposes is prohibited. They are not lint-free and may contaminate the fuel circuit of the system. A lint-free cloth should only be used once.

EC-K9K-61

DIESEL INJECTION Trouble diagnosis - Introduction
5. SAFETY INSTRUCTIONS (CONTINUED): Instructions to be followed before opening the fuel circuit: Use new thinner for each operation (used thinner contains impurities). Pour it into a clean receptacle. For each operation, use a clean brush in good condition (the brush must not shed its bristles). Use a brush and thinners to clean the connections to be opened.

K9K

Blow compressed air over the cleaned parts (tools, cleaned the same way as the parts, connections and injection system zone). Check that no bristles remain adhering. Wash your hands before and during the operation if necessary. When wearing leather protective gloves, cover them with latex gloves. Instructions to be followed during the operation: As soon as the circuit is open, all openings must be plugged to prevent impurities from entering the system. The plugs to be used are available from the Parts Stores. They must not, under any circumstances, be reused . Close the resealable bag, even if it has to be reopened shortly afterwards. The ambient atmosphere carries impurities. All components removed from the injection system must be stored in a hermetically sealed plastic bag once the plugs have been inserted. The use of a brush, thinner, bellows, sponge or normal cloth is strictly forbidden once the circuit has been opened. These items are likely to allow contaminants to enter the system. A new component replacing an old one must not be removed from its packaging until it is to be fitted to the vehicle.

EC-K9K-62

DIESEL INJECTION Trouble diagnosis - Introduction
SYSTEM OPERATION

K9K

The high-pressure injection system is designed to deliver a