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
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Inspection
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damage, loose connections,
chafing and deterioration.
2. Check EVAP canister as follows:
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Exploded View
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2. Clutch tube
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4. Bracket
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1. CSC (Concentric Slave Cylinder)
2. Clutch tube
3. Clutch damper
4. Bracket
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1. Clutch tube
2. Lock pin
3. ...
Precaution
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT
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The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”,
used along
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