P1612

B2193, P1612 Chain of ECM-IMMU

Description

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

DTC Logic

DTC Detection Logic

NOTE:

- If DTC B2193 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to [U1000 CAN COMM Circuit] Immobilizer Control System.
- If DTC B2193 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to [U1010 Control Unit (CAN)] Immobilizer Control System.





DTC Confirmation Procedure

1. PERFORM DTC CONFIRMATION PROCEDURE

1 Turn ignition switch ON.
2 Perform "DTC check" with SDT.

Is DTC detected?
YES
Refer to "Diagnosis Procedure".
NO
Inspection End.

Diagnosis Procedure

1. REPLACE BCM

1 Replace BCM. Refer to [BCM: Removal and Installation] Removal and Replacement.
2 Perform initialization with SDT.
For initialization, refer to SDT Operation Manual.

Does the engine start?
YES
BCM was malfunctioning.
NO
ECM is malfunctioning.

- Replace ECM.
- Perform ECM re-communicating function.