Nissan Qashqai (2007-2010). Manual — part 486

EXCESSIVE CONSUMPTION

EC-1463

< SYMPTOM DIAGNOSIS >

[K9K]

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Perform the TEST 2: INTERNAL FUEL TRANSFER PUMP CHECK. Refer to

EC-1263, "BASIC INSPECTION

: Special Repair Requirement (TEST 2: Internal Fuel Transfer Pump Check)"

.

>> GO TO 10.

10.

CHECK HIGH PRESSURE SUPPLY PUMP (PRESSURE CONTROL VALVE)

Perform the TEST 3: 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]"

.

>> GO TO 11.

11.

CHECK HIGH PRESSURE SUPPLY PUMP (VOLUMETRIC CONTROL VALVE)

Perform the TEST 4: 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]"

.

>> GO TO 12.

12.

CHECK RAIL HIGH PRESSURE CONTROL CIRCUIT

Perform the TEST 5: RAIL HIGH PRESSURE CONTROL CIRCUIT CHECK. Refer to

EC-1267, "BASIC

INSPECTION : Special Repair Requirement (TEST 5: Rail High Pressure Regulation Check)"

.

>> GO TO 13.

13.

CHECK MAJOR LEAK IN FUEL INJECTOR/FUEL INJECTORS OPEN

Perform the TEST 6: MAJOR LEAK IN FUEL INJECTOR/FUEL INJECTORS OPEN. Refer to

EC-1271,

"BASIC INSPECTION : Special Repair Requirement (TEST 6: Major Leak in Fuel Injectors/Fuel Injectors
Open)"

.

>> GO TO 14.

14.

CHECK INCORRECT FUEL INJECTION QUANTITY

Perform the TEST 7: INCORRECT FUEL INJECTION QUANTITY. Refer to

EC-1272, "BASIC INSPECTION :

Special Repair Requirement (TEST 7: Incorrect Fuel Injection Quantity)"

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>> INSPECTION END

EC-1464

< SYMPTOM DIAGNOSIS >

[K9K]

ENGINE KNOCK

ENGINE KNOCK

Description

INFOID:0000000000912093

CHART 16: ENGINE KNOCK

Diagnosis Procedure

INFOID:0000000000912094

1.

CHECK ENGINE OIL

Check the grade of engine oil. Refer to

LU-23, "Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace engine oil. Refer to

LU-24, "Refilling"

2.

CHECK ENGINE OIL LEVEL

Is the engine oil level correct?

Yes or No

Yes

>> GO TO 3.

No

>> Top up the oil.

3.

CHECK ECM POWER SUPPLY AND GROUND CIRCUIT

Check ECM power supply and ground circuit. Refer to

EC-1317, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace harness or connector.

4.

CHECK WIRING HARNESS

Visually check the condition of the engine wiring harness.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace harness or connector.

5.

CHECK AIR INTAKE SYSTEM

Check air intake system. Refer to

EM-265, "Removal and Installation"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace air intake system.

6.

CHECK ELECTRIC THROTTLE CONTROL ACTUATOR

Check electric throttle control actuator. Refer to

EC-1345, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Repair or replace.

7.

CHECK MASS AIR FLOW SENSOR

Check mass air flow sensor. Refer to

EC-1337, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Repair or replace.

8.

CHECK CATALYTIC CONVERTER

Is the catalytic converter clogged or deteriorated?

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Repair or replace.

9.

CHECK HIGH PRESSURE SUPPLY PUMP (PRESSURE CONTROL VALVE)

ENGINE KNOCK

EC-1465

< SYMPTOM DIAGNOSIS >

[K9K]

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G

H

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A

EC

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P

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Perform the TEST 3: 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]"

.

>> GO TO 10.

10.

CHECK HIGH PRESSURE SUPPLY PUMP (VOLUMETRIC CONTROL VALVE)

Perform the TEST 4: 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]"

.

>> GO TO 11.

11.

CHECK RAIL HIGH PRESSURE CONTROL CIRCUIT

Perform the TEST 5: RAIL HIGH PRESSURE CONTROL CIRCUIT CHECK. Refer to

EC-1267, "BASIC

INSPECTION : Special Repair Requirement (TEST 5: Rail High Pressure Regulation Check)"

.

>> GO TO 12.

12.

CHECK MAJOR LEAK IN FUEL INJECTOR/FUEL INJECTORS OPEN

Perform the TEST 6: MAJOR LEAK IN FUEL INJECTOR/FUEL INJECTORS OPEN. Refer to

EC-1271,

"BASIC INSPECTION : Special Repair Requirement (TEST 6: Major Leak in Fuel Injectors/Fuel Injectors
Open)"

.

>> GO TO 13.

13.

CHECK INCORRECT FUEL INJECTION QUANTITY

Perform the TEST 7: INCORRECT FUEL INJECTION QUANTITY. Refer to

EC-1272, "BASIC INSPECTION :

Special Repair Requirement (TEST 7: Incorrect Fuel Injection Quantity)"

.

>> INSPECTION END

EC-1466

< SYMPTOM DIAGNOSIS >

[K9K]

ENGINE OVERHEATING

ENGINE OVERHEATING

Description

INFOID:0000000000912096

CHART 17: ENGINE OVERHEATING

Diagnosis Procedure

INFOID:0000000000912097

1.

CHECK COOLING SYSTEM

Check the cooling system. Refer to

CO-48, "Troubleshooting Chart"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace.

2.

CHECK ECM POWER SUPPLY AND GROUND CIRCUIT

Check ECM power supply and ground circuit. Refer to

EC-1317, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness or connector.

3.

CHECK WIRING HARNESS

Visually check the condition of the engine wiring harness.
Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace harness or connector.

4.

CHECK ENGINE COOLANT TEMPERATURE SENSOR

Check engine coolant temperature sensor. Refer to

EC-1344, "Component Inspection"

.

Is the inspection result normal?

Yes

>> GO TO 5.

No

>> Repair or replace.

5.

CHECK COOLING FAN OPERATION

Check cooling fan operation. Refer to

EC-1422, "Component Function Check"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair or replace.