There is an open in the wires between the HandsFreeLink control unit and the HFL microphone. Replace the affected shielded harness.?
Without Navigation
DTC Troubleshooting: B1779
DTC B1779:
HandsFreeLink steering wheel switch failure (without 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 B1779 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 switch See: Accessories and Optional Equipment/Cellular Phone/Service and Repair/HFL Switch Replacement.?
7. Disconnect the HandsFreeLink control unit 28P connector.
8. Disconnect the dashboard wire harness 20P connector from the cable reel.
9. Turn the ignition switch to ON (II).
10. Measure the voltage between HandsFreeLink control unit 28P connector terminal No. 2 and body ground.
Is there battery voltage?
