B1925

DTC Troubleshooting: B1925

DTC B1925: Ignition Key Switch Signal Error

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 remove the ignition key.

3. Insert the ignition key into the ignition switch, and turn the ignition switch to ON (II).

4. Check for DTCs with the HDS.

Is DTC B1925 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, under-dash fuse/relay box 20P connector R, and at the ignition key switch 6P connector.


5. Turn the ignition switch to LOCK (0) and remove the ignition key.

6. Disconnect the ignition key switch 6P connector.

7. Check for continuity ignition key switch side between ignition key switch 6P connector terminals No. 1 and No. 2.

Is there continuity?
YES - Faulty ignition key switch or short to ground, replace the steering lock assembly.

NO - Go to step 8.






8. Insert the ignition key into the ignition switch.

9. At the ignition key switch side, check for continuity between ignition key switch 6P connector terminals No. 1 and No. 2.

Is there continuity?
YES - Go to step 10.

NO - Faulty ignition key switch, replace the steering lock assembly.






10. Disconnect the immobilizer-keyless control unit 7P connector.

11. Check for continuity between immobilizer-keyless control unit 7P connector terminal No. 6 and ignition key switch 6P connector terminal No. 1.

Is there continuity?
YES - Go to step 12.

NO - Repair open in the wire and check under-dash fuse/relay box 20P connector R.






12. Check for continuity between immobilizer-keyless control unit 7P connector terminal No. 6 and body ground.

Is there continuity?
YES - Repair short to ground in the wire or substitute a known-good under-dash fuse/relay box, and recheck. If the symptom/indication goes away, replace under-dash fuse/relay box.

NO - Replace the immobilizer-keyless control unit. Service and Repair