NO -
Repair an open in the wire between the cable reel and the audio-navigation unit.?
With Navigation
DTC Troubleshooting: B1780
DTC B1780:
HandsFreeLink steering wheel switch line short (with navigation)
NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN system diagnosis test mode A See: Powertrain
Management/Computers and Control Systems/Information Bus/Testing and Inspection/Component Tests and General Diagnostics/Troubleshooting
- B-CAN System Diagnosis Test Mode A.
1. Connect the HDS to the DLC.
2. Clear the DTCs with the HDS.
3. Turn the ignition switch to LOCK (0), then start the engine and turn the steering wheel from lock to lock several times.
4. Check for DTCs with the HDS.
Is DTC B1780 indicated?
YES -
Go to step 5.
NO -
Intermittent failure, the system is OK at this time.?
5. Turn the ignition switch to LOCK (0).
6. Do the HFL switch test See: Accessories and Optional Equipment/Cellular Phone/Testing and Inspection/Component Tests and General
Diagnostics/HFL Switch Test.
Is the switch OK?
YES -
Go to step 7.
NO -
Replace the HFL-navigation voice control switch See: Accessories and Optional Equipment/Sensors and Switches - Accessories and Optional
Equipment/Voice Activation Switch/Service and Repair.?
7. Disconnect the HandsFreeLink control unit 28P connector.
8. Disconnect the cable reel subharness 20P connector from the cable reel.
9. Check for continuity between HandsFreeLink control unit 28P connector terminal No. 2 and body ground.
