B1905

DTC Troubleshooting: B1905

DTC B1905:

Immobilizer-Keyless Control Unit Lost Communication With MICU (Door Lock Switch 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 with the HDS.

Is DTC B1905 indicated?

YES -

Go to step 5.

NO -

Intermittent failure, the immobilizer-keyless control unit is OK at this time. Check for loose or poor connections between the immobilizer-keyless control unit and the MICU.�

5. Check for DTCs with the HDS.

Are DTCs B1155, B1156, B1157, B1159, and B1160 all indicated with DTC B1905 at the same time?

YES -

Faulty MICU; replace the under-dash fuse/relay box.�

- USA models Under-Dash Fuse/Relay Box Removal And Installation (Except Canada Models)
- Canada models Under-Dash Fuse/Relay Box Removal And Installation (Canada Models)

NO -

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