Nissan Qashqai (2007-2010). Manual - part 436

INSPECTION AND ADJUSTMENT

EC-1263

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BASIC INSPECTION : Special Repair Requirement (TEST 5: Rail High Pressure Reg-
ulation Check)

INFOID:0000000001083090

NOTE:
• If contaminants (swarf) can be seen in the transparent return pipe, the entire fuel injection system (fuel injec-

tors, pump, rail, high pressure pipes and all return pipes) must be replaced.

• CONDITIONS PRIOR TO TEST
- Engine coolant temperature between 80 - 90

°

C (176 - 194

°

F).

- All the electrical load are switched off.
- Air conditioning is switched off.
- The tank is at least half-full.
- The pipe connections and unions have been checked.
- Check the sealing of the high pressure pipes and unions.
• CAUSE
- Rail pressure variations around the setpoint.
- The rail reference pressure is not reached.
- Rough idle.
- Possibly noisy combustion.

1.

CHECK AIR BUBBLES

1.

Start engine

2.

Are there large air bubbles in the transparent supply pipe going to the pump?

Is the inspection result normal?

YES

>> Check low pressure system.

NO

>> GO TO 2.

2.

CHECK HIGH PRESSURE SUPPLY PUMP (VOLUMETRIC CONTROL VALVE)-I

Disconnect high pressure supply pump (volumetric control valve) harness connector.
Does the engine stop?

YES

>> GO TO 3.

NO

>> Replace high pressure supply pump (the high pressure supply pump [volumetric control valve]

remains open mechanically).

3.

CHECK HIGH PRESSURE SUPPLY PUMP (PRESSURE CONTROL VALVE)-I

1.

Reconnect high pressure supply pump (volumetric control valve) harness connector.

2.

Turn ignition switch OFF and wait at least 30 seconds.

3.

Start engine.

4.

Disconnect high pressure supply pump (pressure control valve) harness connector.

Does the engine stop?

YES

>> GO TO 4.

NO

>> Replace high pressure supply pump (the high pressure supply pump [pressure control valve]

remains open mechanically).

4.

CHECK FUEL INJECTOR

1.

Reconnect high pressure supply pump (pressure control valve) harness connector.

2.

Wait at least 30 seconds.

3.

Start engine and let it idle speed.

4.

Select “DATA MONITOR” mode with CONSULT-III.

5.

Check that the “F/FLOW_CORR_CYL1”, “F/FLOW_CORR_CYL2”, “F/FLOW_CORR_CYL3”, “F/
FLOW_CORR_CYL4” indication.

Are the reference value 0.3 - 1.9?

YES

>> GO TO 6.

NO

>> GO TO 5.

5.

CHECK MAJOR LEAK IN FUEL INJECTOR/FUEL INJECTORS OPEN

Carry out TEST 6.

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INSPECTION AND ADJUSTMENT

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6.

CHECK ENGINE CONDITION

• Check that the oil level is correct and that the engine coolant temperature is normal operation tempera-

ture.60

°

C (140

°

F)

• Engine running at idle speed.
- Select “HIGH PRES CIRCUIT LEAK TEST” in “ACTIVE TEST” mode with CONSULT-III.
- Engine will perform 4 acceleration cycles.
- Select DATA MONITOR mode with CONSULT-III.
- Check that the “RAIL PRES SET” and “RAIL PRESSURE” indication.
- Does “RAIL PRESSURE” follow “RAIL PRES SET” at during the phase of 4 acceleration cycles?
Is the inspection result normal?

YES

>> GO TO 22.

NO

>> GO TO 7.

7.

CHECK ENGINE COOLANT TEMPERATURE AND FUEL TEMPERATURE

1.

Select “DATA MONITOR” mode with CONSULT-III.

2.

Check that the “FUEL TEMP” indication when operating at idle speed is between 60 - 80

°

C (140 - 176

°

F)

3.

Check that the “WATER TEM” indication is between 80 - 90

°

C (176 - 194

°

F)

NOTE:
• When the fuel temperature is above 136

°

C (277

°

F), the maximum rail pressure is reduced to protect the

plastic pipes.

• When the coolant temperature is above 100

°

C (212

°

F), the maximum rail pressure is reduced to protect the

engine.

Are the “FUEL TEMP” and “WATER TEMP” within the reference value range?

YES

>> GO TO 8.

NO

>> Check the fuel pump temperature sensor (Refer to 

EC-1348, "Component Inspection"

) or engine

coolant temperature sensor (Refer to 

EC-1344, "Component Inspection"

).

8.

CHECK HIGH PRESSURE SUPPLY PUMP (VOLUMETRIC CONTROL VALVE) POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect high pressure supply pump (volumetric control valve) harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between high pressure supply pump (volumetric control valve) harness connector and
ground.

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> GO TO 9.

9.

DETECT MALFUNCTIONING PART

Check the following.
• IPDM E/R 
• Harness connector E7, F121
• Harness for open or short between ECM and high pressure supply pump (volumetric control valve)
• Harness for open or short between IPDM E/R and high pressure supply pump (volumetric control valve)

>> Repair open circuit or short to ground or short to power in harness or connectors.

10.

CHECK HIGH PRESSURE SUPPLY PUMP (VOLUMETRIC CONTROL VALVE) OUTPUT SIGNAL CIR-

CUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

High pressure supply pump 

(volumetric control valve)

Ground

Voltage

Connector

Terminal

F106

1

Ground

Battery voltage

INSPECTION AND ADJUSTMENT

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3.

Check the continuity between high pressure supply pump (volumetric control valve) harness connector
and ECM harness connector.

4.

Also check harness for short to ground and short to power. 

Is the inspection result normal?

YES

>> GO TO 11.

NO

>> Repair open circuit or short to ground or short to power in harness or connectors.

11.

CHECK HIGH PRESSURE SUPPLY PUMP (VOLUMETRIC CONTROL VALVE)-II

Refer to 

EC-1321, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 12.

NO

>> Replace high pressure supply pump.

12.

CHECK HIGH PRESSURE SUPPLY PUMP (PRESSURE CONTROL VALVE) POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect high pressure supply pump (pressure control valve) harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between high pressure supply pump (pressure control valve) harness connector and
ground.

Is the inspection result normal?

YES

>> GO TO 14.

NO

>> GO TO 13.

13.

DETECT MALFUNCTIONING PART

Check the following.
• IPDM E/R 
• Harness connector E7, F121
• Harness for open or short between IPDM E/R and high pressure supply pump (pressure control valve)
• Harness for open or short between ECM and high pressure supply pump (pressure control valve)

>> Repair open circuit or short to ground or short to power in harness or connectors.

14.

CHECK HIGH PRESSURE SUPPLY PUMP (PRESSURE CONTROL VALVE) OUTPUT SIGNAL CIR-

CUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between high pressure supply pump (pressure control valve) harness connector and
ECM harness connector.

4.

Also check harness for short to ground and short to power. 

Is the inspection result normal?

High pressure supply pump 

(volumetric control valve)

ECM

Continuity

Connector

Terminal

Connector

Terminal

F106

2

F68

50

Existed

High pressure supply pump 

(Pressure control valve)

Ground

Voltage

Connector

Terminal

F107

3

Ground

Battery voltage

High pressure supply pump 

(Pressure control valve)

ECM

Continuity

Connector

Terminal

Connector

Terminal

F107

4

F68

49

Existed

EC-1266

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INSPECTION AND ADJUSTMENT

YES

>> GO TO 15.

NO

>> Repair open circuit or short to ground or short to power in harness or connectors.

15.

CHECK HIGH PRESSURE SUPPLY PUMP (PRESSURE CONTROL VALVE)-II

Refer to 

EC-1334, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 16.

NO

>> Replace high pressure supply pump.

16.

CHECK FUEL RAIL PRESSURE SENSOR POWER SUUPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect fuel rail pressure sensor harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between fuel rail pressure sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 17.

NO

>> Repair open circuit or short to ground or short to power in harness or connectors.

17.

CHECK FUEL RAIL PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between fuel rail pressure sensor harness connector and ECM harness connector.

4.

Also check harness for short to ground and short to power. 

Is the inspection result normal?

YES

>> GO TO 18.

NO

>> Repair open circuit or short to ground or short to power in harness or connectors.

18.

CHECK FUEL RAIL PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Check the continuity between fuel rail pressure sensor harness connector and ECM harness connector.

2.

Also check harness for short to ground and short to power. 

Is the inspection result normal?

YES

>> GO TO 19.

NO

>> Repair open circuit or short to ground or short to power in harness or connectors.

19.

CHECK FUEL RAIL PRESSURE SENSOR

Refer to 

EC-1350, "Component Inspection"

. 

Is the inspection result normal?

YES

>> GO TO 20.

NO

>> Replace fuel rail.

20.

CHECK FUEL RAIL PRESSURE-I

1.

Reconnect all harness connectors disconnected.

Fuel rail pressure sensor

Ground

Voltage (V)

Connector

Terminal

F102

3

Ground

Approx. 5

Fuel rail pressure sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

F102

2

F85

15

Existed

Fuel rail pressure sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

F102

1

F85

19

Existed