Nissan Juke Service and Repair Manual : P0603 ECM

Description

ECM has the memory function of the DTC memory, the air-fuel ratio feedback compensation value memory, the Idle Air Volume Learning value memory, etc. even when the ignition switch is turned OFF.

DTC Logic


DTC Logic

DTC DETECTION LOGIC

*: This self-diagnosis is not for ECM power supply circuit, even though ECM


*: This self-diagnosis is not for ECM power supply circuit, even though ECM BACK UP/CIRCUIT is displayed on CONSULT-III screen.

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.

>> GO TO 2.

2.PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON wait at least 10 seconds.

2. Turn ignition switch OFF and wait at least 5 minutes 3. Turn ignition switch ON, wait at least 10 seconds.

4. Repeat step 2 and 3 for five times.

5. Check 1st trip DTC.

Is 1st trip DTC detected? YES >> Go to EC-681, "Diagnosis Procedure".

NO >> INSPECTION END

Diagnosis Procedure

1.INSPECTION START

1. Erase DTC.

2. Perform DTC CONFIRMATION PROCEDURE.

See EC-681, "DTC Logic".

Is the 1st trip DTC P0603 displayed again? YES >> GO TO 2.

NO >> INSPECTION END

2.REPLACE ECM

1. Replace ECM.

2. Perform EC-541, "Work Procedure".

>> INSPECTION END

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