Nissan Rogue. Manual - part 522

EC-356

< DTC/CIRCUIT DIAGNOSIS >

[QR25DE]

P0506 ISC SYSTEM

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000011278065

1.

CHECK DTC PRIORITY

If DTC P0506 is displayed with other DTC, first perform the trouble diagnosis for other DTC.
Is applicable DTC detected?

YES

>> Perform diagnosis of applicable. Refer to 

EC-96, "DTC Index"

.

NO

>> GO TO 2.

2.

CHECK INTAKE AIR LEAK

1. Start engine and let it idle.

2. Listen for an intake air leak after the mass air flow sensor.
Is intake air leak detected?

YES

>> Discover air leak location and repair.

NO

>> Replace ECM. Refer to 

EC-502, "Removal and Installation"

.

P0507 ISC SYSTEM

EC-357

< DTC/CIRCUIT DIAGNOSIS >

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P0507 ISC SYSTEM

Description

INFOID:0000000011278066

The ECM controls the engine idle speed to a specified level through the fine adjustment of the air, which is let

into the intake manifold, by operating the electric throttle control actuator. The operating of the throttle valve is

varied to allow for optimum control of the engine idling speed. The crankshaft position sensor (POS) detects

the actual engine speed and sends a signal to the ECM.

The ECM controls the electric throttle control actuator so that the engine speed coincides with the target value

memorized in the ECM. The target engine speed is the lowest speed at which the engine can operate steadily.

The optimum value stored in the ECM is determined by taking into consideration various engine conditions,

such as during warming up, deceleration, and engine load (air conditioner, power steering and cooling fan

operation, etc.). 

DTC Description

INFOID:0000000011278067

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Electric throttle control actuator

• Intake air leak

• PCV system

FAIL-SAFE

Not applicable

DTC CONFIRMATION PROCEDURE

1.

CHECK DTC PRIORITY

If DTC P0507 is displayed with other DTC, first perform the trouble diagnosis for other DTC.
Is applicable DTC detected?

YES

>> Perform diagnosis of applicable. Refer to 

EC-96, "DTC Index"

.

NO

>> GO TO 2.

2.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure

before conducting the next test.

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

If the target idle speed is out of the specified value, perform 

EC-144, "Work Procedure"

, before con-

ducting DTC Confirmation Procedure.

TESTING CONDITION:

• Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.

• Always perform the test at a temperature above 

−10°C (14°F).

>> GO TO 3.

3.

PERFORM DTC CONFIRMATION PROCEDURE

1. Start engine and warm it up to normal operating temperature.

2. Turn ignition switch OFF and wait at least 10 seconds.

3. Start engine and run it for at least 1 minute at idle speed.

4. Check 1st trip DTC.
Is 1st trip DTC detected?

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P0507

ISC SYSTEM
(Idle air control system RPM higher than ex-
pected)

The idle speed is more than the target idle speed by 200 rpm or more.

EC-358

< DTC/CIRCUIT DIAGNOSIS >

[QR25DE]

P0507 ISC SYSTEM

YES

>> Proceed to 

EC-358, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000011278068

1.

CHECK DTC PRIORITY

If DTC P0507 is displayed with other DTC, first perform the trouble diagnosis for other DTC.
Is applicable DTC detected?

YES

>> Perform diagnosis of applicable. Refer to 

EC-96, "DTC Index"

.

NO

>> GO TO 2.

2.

CHECK PCV HOSE CONNECTION

Confirm that PCV hose is connected correctly.
Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace error-detected parts.

3.

CHECK INTAKE AIR LEAK

1. Start engine and let it idle.

2. Listen for an intake air leak after the mass air flow sensor.
Is intake air leak detected?

YES

>> Discover air leak location and repair.

NO

>> Replace ECM. Refer to 

EC-502, "Removal and Installation"

.

P050A, P050B, P050E COLD START CONTROL

EC-359

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P050A, P050B, P050E COLD START CONTROL

Description

INFOID:0000000011278069

ECM controls ignition timing and engine idle speed when engine is started with pre-warming up condition.

This control promotes the activation of three way catalyst by heating the catalyst and reduces emissions.

DTC Description

INFOID:0000000011278070

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Lack of intake air volume

• Fuel injection system

• ECM

FAIL-SAFE

P050A

Traveling control mode (Accelerator angle variation control)

P050B, P050E

Not applicable

DTC CONFIRMATION PROCEDURE

1.

CHECK DTC PRIORITY

If DTC P050A, P050B or P050E is displayed with other DTC, first perform the trouble diagnosis for other DTC.
Is applicable DTC detected?

YES

>> Perform diagnosis of applicable. Refer to 

EC-96, "DTC Index"

.

NO

>> GO TO 2.

2.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure

before conducting the next test.

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.

>> GO TO 3.

3.

PERFORM DTC CONFIRMATION PROCEDURE-1

 With CONSULT

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Select “DATA MONITOR” mode with CONSULT.

4. Check the indication of “COOLAN TEMP/S”.

 With GST

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P050A

COLD START CONTROL
(Cold start idle air control system perfor-
mance)

ECM does not control engine idle speed properly when engine is started 
with pre-warming up condition.

P050B

COLD START CONTROL
(Cold start ignition timing performance)

ECM does not control ignition timing properly when engine is started with 
pre-warming up condition.

P050E

COLD START CONTROL
(Cold start engine exhaust temperature too 
low)

The temperature of the catalyst inlet does not rise to the proper tempera-
ture when the engine is started with pre-warming up condition.