Diagnosis Procedure

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the voltage between ECM harness connector terminals under the following conditions.
   VOLTAGE SPECIFICATIONS
   
   

   ECM				Voltage
   +		-
   Connector	Terminal	Connector	Terminal
   F102	93	M107	128	Battery voltage

Is the inspection result normal? 

YES: GO TO  3.

NO: GO TO 2.

Check the following.

• Harness connectors E3, F1
• 15A fuse (No. 50)
• IPDM E/R harness connector E7
• Harness for open or short between ECM and battery

Repair or replace harness or connectors.

Refer to "INTERMITTENT INCIDENT ".

Is the inspection result normal? 

YES: GO TO 4.

NO: Repair or replace harness or connectors.

1. Turn ignition switch ON.
2. Erase DTC.
3. Perform DTC Confirmation Procedure.

   +See "DTC LOGIC ".

Is the 1st trip DTC P0603 displayed again? 

YES: GO TO 5.

NO: INSPECTION END

1. Replace ECM.
2. Go to "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : SPECIAL REPAIR REQUIREMENT ".

INSPECTION END