Nissan Juke Service and Repair Manual : Loss of power

Description

CHART 12: LOSS OF POWER

Diagnosis Procedure

1.CHECK FUEL

Check that the fuel reservoir is correctly filled and with the right fuel.

>> GO TO 2.

2.CHECK FUEL FILTER

Check the correctness of the fuel filter.

Is the fuel filter correct? Yes >> GO TO 3.

No >> Replace the fuel filter with an genuine part.

3.CHECK ENGINE OIL

Check the grade of engine oil. Refer to LU-33, "Inspection".

Is the inspection result normal? YES >> GO TO 4.

NO >> Replace engine oil. Refer to LU-34, "Refilling".

4.CHECK ENGINE OIL LEVEL

Is the engine oil level correct? Yes or No Yes >> GO TO 5.

No >> Top up the oil.

5.CHECK ECM POWER SUPPLY AND GROUND CIRCUIT

Check ECM power supply and ground circuit. Refer to EC-885, "Diagnosis Procedure".

Is the inspection result normal? YES >> GO TO 6.

NO >> Repair or replace harness or connector.

6.CHECK WIRING HARNESS

Visually check the condition of the engine wiring harness.

Is the inspection result normal? YES >> GO TO 7.

NO >> Repair or replace harness or connector.

7.CHECK AIR INTAKE SYSTEM

Check air intake system. Refer to EM-280, "Removal and Installation".

Is the inspection result normal? YES >> GO TO 8.

NO >> Repair or replace.

8.CHECK ELECTRIC THROTTLE CONTROL ACTUATOR

Check electric throttle control actuator. Refer to EC-909, "Diagnosis Procedure".

Is the inspection result normal? YES >> GO TO 9.

NO >> Repair or replace.

9.CHECK MASS AIR FLOW SENSOR

Check mass air flow sensor. Refer to EC-902, "Component Inspection".

Is the inspection result normal? YES >> GO TO 10.

NO >> Repair or replace.

10.CHECK ACCELERATOR PEDAL POSITION SENSOR

Check the accelerator pedal position sensor. Refer to EC-1001, "Component Inspection".

Is the inspection result normal? YES >> GO TO 11.

NO >> Repair or replace.

11.CHECK CLUTCH PEDAL POSITION SWITCH

Check clutch pedal position switch.

Is the inspection result normal? YES >> GO TO 12.

NO >> Repair or replace.

12.CHECK VEHICLE SPEED SIGNAL

Check the following component.

• ???ABS actuator and electric unit (control unit)??? [Refer to BRC-24, "CONSULT-III Function". (Without ESP), BRC-131, "CONSULT-III Function". (With ESP)] • Combination meter (Refer to MWI-23, "CONSULT-III Function".) Is the inspection result normal? YES >> GO TO 13.

NO >> Repair or replace.

13.CHECK TURBOCHARGER

Check that the turbocharger is working properly. Refer to EC-1003, "Diagnosis Procedure".

Is the turbocharger correct? Yes >> GO TO 14.

No >> Repair or replace.

14.CHECK CAN COMMUNICATION

Perform trouble diagnosis on the CAN communication line using CONSULT-III. Refer to LAN-31, "CAN COMMUNICATION SYSTEM : CAN Communication Signal Chart".

Is the inspection result normal? YES >> GO TO 15.

NO >> Repair or replace harness or connector.

15.CHECK EGR SYSTEM

Check EGR system. Refer to EC-954, "Diagnosis Procedure".

Is the inspection result normal? YES >> GO TO 16.

NO >> Repair or replace.

16.CHECK CATALYTIC CONVERTER

Is the catalytic converter clogged or deteriorated? Is the inspection result normal? YES >> GO TO 17.

NO >> Repair or replace.

17.CHECK LOW PRESSURE CIRCUIT

Perform the TEST 1: LOW PRESSURE CIRCUIT CHECK. Refer to EC-867, "Work Procedure (TEST 1: Low Pressure Fuel Supply System Check)".

>> GO TO 18.

18.CHECK INTERNAL FUEL TRANSFER PUMP

Perform the TEST 2: INTERNAL FUEL TRANSFER PUMP CHECK. Refer to EC-868, "Work Procedure (TEST 2: Internal Fuel Transfer Pump Check)".

>> GO TO 19.

19.CHECK HIGH PRESSURE SUPPLY PUMP (PRESSURE CONTROL VALVE)

Perform the TEST 3: HIGH PRESSURE SUPPLY PUMP (PRESSURE CONTROL VALVE). Refer to EC-868, "Work Procedure [TEST 3: High Pressure Supply Pump (Pressure Control Valve) Check]".

>> GO TO 20.

20.CHECK HIGH PRESSURE SUPPLY PUMP (VOLUMETRIC CONTROL VALVE)

Perform the TEST 4: HIGH PRESSURE SUPPLY PUMP (VOLUMETRIC CONTROL VALVE). Refer to EC- 869, "Work Procedure [TEST 4: High Pressure Supply Pump (Volumetric Control Valve) Check]".

>> GO TO 21.

21.CHECK RAIL HIGH PRESSURE CONTROL CIRCUIT

Perform the TEST 5: RAIL HIGH PRESSURE CONTROL CIRCUIT CHECK. Refer to EC-871, "Work Procedure (TEST 5: Rail High Pressure Regulation Check)".

>> GO TO 22.

22.CHECK MAJOR LEAK IN FUEL INJECTOR/FUEL INJECTORS OPEN

Perform the TEST 6: MAJOR LEAK IN FUEL INJECTOR/FUEL INJECTORS OPEN. Refer to EC-876, "Work Procedure (TEST 6: Fuel Injectors Leak Check)".

>> GO TO 23.

23.CHECK INCORRECT FUEL INJECTION QUANTITY

Perform the TEST 7: INCORRECT FUEL INJECTION QUANTITY. Refer to EC-877, "Work Procedure (TEST 7: Fuel Injection Quantity Check)".

>> INSPECTION END

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