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