B1905

DTC Troubleshooting: B1905

DTC B1905: Immobilizer-Keyless Control Unit Lost Communication with Driver's MPCS Unit (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 ON (II).

3. Wait for more than 6 seconds.

4. Check for DTCs with 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 between the immobilizer-keyless control unit and the driver's MPCS unit.


5. Check for DTCs with the HDS.

Are DTCs B1013, B1065, B1182, and/or B1356 also indicated?
YES - Do the driver's MPCS unit input test. Multiplex Integrated Control System Driver's MPCS Unit Input Test

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