B1780

Control System DTCs

DTC Troubleshooting: B1780

DTC B1780 : HandsFreeLink steering wheel switch line short

NOTE:
* Check the vehicle battery condition first Battery Test.
* Check the connectors for poor connections or loose terminals.

1. Problem verification:

Problem verification
-1. Check for HFL DTCs How To Troubleshoot The HandsFreeLink System.

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):

Determine possible failure area (HFL switch, others)
-1. Turn the ignition switch to LOCK (0).

-2. Do the HFL Switch Test Service and Repair.

Is the switch OK?
-YES- Go to step 3.
-NO- Replace the HFL switch Service and Repair.

3. Shorted wire check (HFT_NAVI_REMOTE_SW line):

Shorted wire check (HFT_NAVI_REMOTE_SW line)
-1. Disconnect the following connectors.





-2. Check for continuity between test points 1 and 2.









Is there continuity?
-YES- Repair a short to body ground in the wire between the HandsFreeLink control unit, the cable reel, and the HFL switch.
-NO- Replace the HandsFreeLink control unit Service and Repair.