DTC B1674: Ignition Switch Control Unit (ROTATE SW) Circuit Short
- Clear the DTCs with the HDS.
- Turn the ignition switch to LOCK (0).
- Insert the built-in key into the ignition switch.
- Turn the ignition switch to ON (II), and to LOCK (0) ten times using the built-in key.
- 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.
- Turn the ignition switch to LOCK (0).
- Disconnect keyless access control unit connector A (31P).
- Disconnect the ignition switch control unit 10P connector.
- Check for continuity between ignition switch control unit 10P connector terminal No. 8 and body ground.Fig 1: Checking Continuity Between Ignition Switch Control Unit 10P Connector Terminal No. 8 And Body Ground
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Is there continuity?
YES -Repair short to ground in the wire.
NO -Go to step 10.
- Check for continuity between ignition switch control unit 10P connector terminals No. 8 and No. 6.Fig 2: Checking Continuity Between Ignition Switch Control Unit 10P Connector Terminals No. 8 And No. 6
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Is there continuity?
YES -Replace the ignition switch control unit.
NO -Replace the keyless access control unit.