Nissan Rogue. Instruction — 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
.
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
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
.
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
, 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
.
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
.
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
P050A, P050B, P050E COLD START CONTROL
EC-359
< DTC/CIRCUIT DIAGNOSIS >
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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
.
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.
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