B1674

DTC B1674: Ignition Switch Control Unit (Rotate Switch Line) Circuit Short

1. Clear the DTCs with the HDS.
2. Turn the ignition switch OFF.
3. Insert the ignition key into the ignition key switch.
4. Turn the ignition switch ON (II) and OFF ten times using the ignition key.
5. Check for DTCs with the HDS.

Is DTC B1674 indicated?

YES - Go to step 6.

NO - Intermittent failure. The system is OK at this time. Check for loose or poor connections at the keyless access control unit and at the ignition switch control unit.

6. Turn the ignition switch OFF.
7. Disconnect keyless access control unit connector A (31P).
8. Disconnect the ignition switch control unit 10P connector.




9. Check for continuity between ignition switch control unit 10P connector terminal No. 8 and body ground.

Is there continuity?

YES - Repair a short in the wire.

NO - Go to step 10.




10. Check for continuity between ignition switch control unit 10P connector terminals No. 8 and No. 6.

Is there continuity?

YES - Replace the ignition switch control unit.

NO - Replace the keyless access control unit.