B1906

DTC Troubleshooting: B1906

DTC B1906: Immobilizer-Keyless Control Unit Lost Communication with Gauge Control Module (A/T Message)

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A. Troubleshooting - B-CAN System Diagnosis Test Mode A

1. Clear the DTCs with the HDS.

2. Turn the ignition switch to LOCK (0) and then back ON (II).

3. Wait for more than 6 seconds.

4. Check for DTCs with the HDS.

Is DTC B1906 indicated?
YES - Go to step 5.

NO - Intermittent failure, the system is OK at this time. Check for loose or poor connections between the immobilizer-keyless control unit and the gauge control module.


5. Check for DTCs with the HDS.

Are DTCs B1061, B1359, B1808, and B1956 also indicated?
YES - Do the gauge control module input test. Gauge Control Module Input Test

NO - Do the immobilizer-keyless control unit input test. Immobilizer-Keyless Control Unit Input Test