P0603

P0603 ECM

DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


1. PRECONDITIONING

TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is 11 V or more with ignition switch ON.
- GO TO 2.

2. PERFORM DTC CONFIRMATION PROCEDURE

1.Turn ignition switch ON and wait at least 1 second.
2.Turn ignition switch OFF and wait at least 10 seconds.
3.Repeat step 1 and 2 for 10 times.
4.Turn ignition switch ON.
5.Check 1st trip DTC.
Is 1st trip DTC detected?
YES- Proceed to "Diagnosis Procedure" .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK ECM POWER SUPPLY AND GROUND CIRCUIT

Perform trouble diagnosis for ECM power supply and ground circuit. Refer to "Diagnosis Procedure" Power Supply And Ground Circuit.
Is the inspection result normal?
YES- GO TO 2.
NO- Repair or replace error-detected parts.

2. CHECK INTERMITTENT INCIDENT

Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.
Is the inspection result normal?
YES- GO TO 3.
NO- Repair or replace error-detected parts.

3. PERFORM DTC CONFIRMATION PROCEDURE

1.Turn ignition switch ON.
2.Erase DTC.
3.Perform DTC confirmation procedure. Refer to "DTC Logic" .
Is the 1st trip DTC P0603 displayed again?
YES- Replace ECM. Refer to "Removal and Installation" Service and Repair.
NO- INSPECTION END