P1612

P1612 CHAIN OF ECM-IMMU





Description
BCM performs the ID verification with ECM that allows the engine to start. Start the engine if the ID is OK.
ECM prevents the engine from starting if the ID is not registered. BCM starts the communication with ECM if ignition switch is turned ON.




DTC Logic

DTC DETECTION LOGIC

NOTE:
- If DTC P1612 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to Security System.
- If DTC P1612 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to Security System.

DTC Detection Logic:

DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON under the following conditions.
- Selector lever is in the P or N position.
- Do not depress brake pedal.
2. Check "Self diagnostic result" with CONSULT-III.
Is DTC detected?
YES - Go to P1612.
NO - INSPECTION END




Diagnosis Procedure
1.REPLACE BCM
1. Replace BCM. Refer to Removal and Installation.
2. Perform initialization with CONSULT-III.
For initialization, refer to "CONSULT-III Operation Manual NATS-IVIS/NVIS".
Does the engine start?
YES - INSPECTION END
NO - GO TO 2.
2.REPLACE ECM
Replace ECM. Refer to Basic Inspection (VQ35HR), Basic Inspection(VK50VE).
- INSPECTION END