Nissan Juke Service and Repair Manual : Engine idle speed too low or unstable

Description

CHART 6: ENGINE IDLE SPEED TOO LOW OR UNSTABLE

Diagnosis Procedure

1.CHECK FUEL

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

>> GO TO 2.

2.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 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 AIR INTAKE SYSTEM

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

Is the inspection result normal? YES >> GO TO 5.

NO >> Repair or replace air intake system. Refer to EM-280, "Removal and Installation".

5.CHECK ELECTRIC THROTTLE CONTROL ACTUATOR

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

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

NO >> Repair or replace.

6.CHECK MASS AIR FLOW SENSOR

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

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

NO >> Repair or replace.

7.CHECK REFRIGERANT PRESSURE SENSOR

Check refrigerant pressure sensor. Refer to EC-960, "Diagnosis Procedure".

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

NO >> Repair or replace.

8.CHECK EGR SYSTEM

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

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

NO >> Repair or replace.

9.CHECK CATALYTIC CONVERTER

Is the catalytic converter clogged or deteriorated?

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

NO >> Repair or replace.

10.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 11.

11.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 12.

12.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 13.

13.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 14.

14.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 15.

15.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 16.

16.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

    Engine idle speed too high
    Description CHART 5: ENGINE IDLE SPEED TOO HIGH Diagnosis Procedure 1.CHECK ECM POWER SUPPLY AND GROUND CIRCUIT Check ECM power supply and ground circuit. Refer to EC-885, "Diagnosis Proced ...

    Engine stalling
    Description CHART 7: ENGINE STALLING Diagnosis Procedure 1.CHECK FUEL Check that the fuel reservoir is correctly filled and with the right fuel. >> GO TO 2. 2.CHECK ECM POWER SUPPLY AN ...

    Other materials:

    Super lock actuator
    Driver side DRIVER SIDE : Component Function Check 1.CHECK FUNCTION 1. Select “DOOR LOCK” of “BCM” using CONSULT-III. 2. Select “SUPER LOCK” in “ACTIVE TEST” mode. 3. Check that the function operates normally according to the following conditions. Is the inspection result normal? YES > ...

    LAN System can system (type 4)
    DTC/CIRCUIT DIAGNOSIS Main line between IPDM-E and DLC circuit Diagnosis Procedure 1.CHECK CONNECTOR 1. Turn the ignition switch OFF. 2. Disconnect the battery cable from the negative terminal. 3. Check the following terminals and connectors for damage, bend and loose connection (connector s ...

    Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER"
    The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collision. Information necessary to service the system safely is include ...