DTC B1780: HandsFreeLink Steering Wheel Switch Line Short
NOTE:
- Check the vehicle 12 volt battery condition first .
- Before you troubleshoot, make sure to follow the General Troubleshooting Information .
- Check the connectors for poor connections or loose terminals.
- 1. Problem verification:
1. Start the engine, and turn the steering wheel left and right several times.
2. Check for HFL DTCs .
Is DTC B1780 indicated?
YES
The failure is duplicated, go to step 2.
NO
Intermittent failure, the system is OK at this time.
- 2. Determine possible failure area (HFL switch, others):
1. Turn the vehicle to the OFF (LOCK) mode.
Is the switch OK?
YES
Go to step 3.
NO
- 3. Shorted wire check (HFT/NAVI REMOTE SW line):
1. Disconnect the following connector.
HandsFreeLink control unit 32P connector 2. Reconnect cable reel connector C (20P).
3. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode HandsFreeLink control unit 32P connector: disconnected HFL switch 7P connector: disconnected Test point 1 HandsFreeLink control unit 32P connector No. 15 Test point 2 Body ground Is there continuity?
YES
Repair a short to body ground in the wire between the HandsFreeLink control unit and the HFL switch. If the wire is OK, replace the cable reel .
NO