Nissan Qashqai (2007-2010). Manual — part 452

P0087 FUEL PUMP

EC-1327

< COMPONENT DIAGNOSIS >

[K9K]

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P0087 FUEL PUMP

DTC Logic

INFOID:0000000001115058

DTC DETECTION LOGIC

NOTE:
• Conditions for applying the diagnostic procedure to the stored DTCs:

The DTC becomes present during the first 30 seconds after the engine starts.

• In low ambient temperature conditions, diagnostic can.t make difference between a normal long engine start

and abnormal long engine start. So, DTC must be take in account only if customer complains about too long
or impossible engine start not only in cold conditions but also and especially in warm conditions. If customer
complains only in cold conditions, root cause of the problem could elsewhere like low battery level, bad fuel
specification (too viscous fuel). This DTC could appear after fuel filter too.

• Special notes:

Starting and engine operation difficult or impossible.

Diagnosis Procedure

INFOID:0000000000952676

1.

CHECK LOW PRESSURE FUEL SUPPLY SYSTEM

Refer to

EC-1262, "BASIC INSPECTION : Special Repair Requirement (TEST 1: Low Pressure Fuel Supply

System Check)"

.

Is the inspection result normal?

OK

>> GO TO 2.

NG

>> Replace or replace. Then GO TO 7.

2.

CHECK INTERNAL FUEL TRANSFER PUMP

Refer to

EC-1263, "BASIC INSPECTION : Special Repair Requirement (TEST 2: Internal Fuel Transfer Pump

Check)"

.

Is the inspection result normal?

OK

>> GO TO 3.

NG

>> Replace or replace. Then GO TO 7.

3.

CHECK HIGH PRESSURE SUPPLY PUMP (PRESSURE CONTROL VALVE)

Refer to

EC-1263, "BASIC INSPECTION : Special Repair Requirement [TEST 3: High Pressure Supply Pump

(Pressure Control Valve) Check]"

.

Is the inspection result normal?

OK

>> GO TO 4.

NG

>> Replace or replace. Then GO TO 7.

4.

CHECK HIGH PRESSURE SUPPLY PUMP (VOLUMETRIC CONTROL VALVE)

Refer to

EC-1264, "BASIC INSPECTION : Special Repair Requirement [TEST 4: High Pressure Supply Pump

(Volumetric Control Valve) Check]"

.

Is the inspection result normal?

OK

>> GO TO 5.

DTC No.

Trouble diagnosis name

Possible cause

P0087

RAIL PRESSURE
1.DEF: Rail pressure too low on starting

• High pressure supply pump
• High pressure supply pump (Pres-

sure control valve)

• High pressure supply pump (Volu-

metric control valve)

• Fuel injector
• Fuel rail pressure sensor
• Air mixed with fuel
• Lack of fuel
• Fuel rail pressure relief valve
• Fuel line
• Harness or connector

EC-1328

< COMPONENT DIAGNOSIS >

[K9K]

P0087 FUEL PUMP

NG

>> Replace or replace. Then GO TO 7.

5.

CHECK RAIL HIGH PRESSURE REGULATION

Refer to

EC-1267, "BASIC INSPECTION : Special Repair Requirement (TEST 5: Rail High Pressure Regula-

tion Check)"

.

Is the inspection result normal?

OK

>> GO TO 6.

NG

>> Replace or replace. Then GO TO 7.

6.

CHECK INTERMITTENT INCIDENT

Refer to

GI-39, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> INSPECTIO END.

NO

>> Repair or replace. Then GO TO 7.

7.

CLEAR PRESSURE REGULATION

Perform “PRESS_REG_ADAPTIVE” in WORK SUPPORT mode with CONSULT-III.

>> INSPECTION END.

P0090 FUEL PUMP

EC-1329

< COMPONENT DIAGNOSIS >

[K9K]

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P0090 FUEL PUMP

DTC Logic

INFOID:0000000001115060

DTC DETECTION LOGIC

NOTE:
• Conditions for applying the diagnostic procedure to the stored DTCs:

The DTC becomes present after the engine is started.

• If the DTC is present:
- Malfunction indicator (Red) lights up.

Diagnosis Procedure

INFOID:0000000000953542

1.

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 3.

NO

>> GO TO 2.

2.

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.

3.

CHECK HIGH PRESSURE SUPPLY PUMP (PRESSURE CONTROL VALVE) OUTPUT SIGNAL CIRCUIT

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.

DTC No.

Trouble diagnosis name

Possible cause

P0090

HIGH PRESSURE SUPPLY PUMP (PRESSURE CONTROL VALVE)
CIRCUIT
• CO: Open circuit
• CO.0: Short circuit to ground
• CC.1: Short circuit to +12V
• 1.DEF: Parameter at maximum level

• Harness or connectors

[High pressure supply pump (pressure
control valve) circuit is open or shorted.]

• High pressure supply pump (pressure

control valve)

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-1330

< COMPONENT DIAGNOSIS >

[K9K]

P0090 FUEL PUMP

4.

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

Is the inspection result normal?

YES

>> GO TO 4.

NO

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

4.

HIGH PRESSURE SUPPLY PUMP (PRESSURE CONTROL VALVE) CHECK

Refer to

EC-1334, "Component Inspection"

.

Is the inspection result normal?

Yes

>> GO TO 5.

No

>> Replace high pressure supply pump.

5.

INSPECTION END

High pressure supply pump (pressure control valve) OK.

>> INSPECTION END

Component Inspection

INFOID:0000000001034422

1.

CHECK HIGH PRESSURE SUPPLY PUMP (PRESSURE CONTROL VALVE)

1.

Turn ignition switch OFF.

2.

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

3.

Check resistance between high pressure supply pump (pressure control valve) terminals as follows.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace high pressure supply pump.

Terminals

Resistance

3 and 4

1.5 - 15

Ω