B2791

DTC B2791 COMMUNICATION FAILURE BETWEEN EFI ECU

CIRCUIT DESCRIPTION

DTC Detecting Condition:

- If the ID code box receives a verification request signal from the ECM, it sends back verification information obtained from the certification ECU or steering lock ECU via the LIN communication line to the ECM.
- The ID code box sends immobilizer SET/UNSET signals to the ECM based on the information received from the certification ECU via the LIN communication line.

HINT:
- If the engine switch is turned off immediately after engine start, this DTC is also stored.
- If this DTC is detected, check if any other DTCs such as B2799 are output.

Wiring Diagram:

Step 1:

INSPECTION PROCEDURE