B1905

DTC Troubleshooting: B1905

DTC B1905:

Immobilizer-Keyless Control Unit Lost Communication With MICU (DRLOCKSW 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 to ON (II).

3. Wait for at least 6 seconds.

4. Check for DTCs witch the HDS.

Is DTC B1905 indicated?

YES -

Go to step 5.

NO -

Intermittent failure, the system is OK at this time. Check for loose or poor connections at the immobilizer-keyless control unit 7P connector, and under-dash fuse/relay box connector Q (16P).�

5. Check for DTCs with the HDS.

Is DTC B1160 also indicated with DTC B1905?

YES -

Faulty MICU; replace the under-dash fuse/relay box Under-Dash Fuse/Relay Box Removal And Installation.�

NO -

Replace the immobilizer-keyless control unit Service and Repair.�