Hands Free Telephone System Symptom Troubleshooting - The audio-HVAC subdisplay an HFT digits that does not go away after pressing the HFT BACK button
The audio-HVAC subdisplay an HFT digits that does not go away after pressing the HFT BACK button
  1. Connect the HDS to the DLC.
  1. Clear the DTCs with the HDS.
  1. Turn the ignition switch to LOCK (0) and then to ON (II).
  1. Check for DTCs.
Are there any DTCs indicated?
YES -
Repair the indicated DTCs.■
NO -
Go to Step 5 .
  1. Turn the ignition to LOCK (0).
  1. Substitute a known-good Hands Free Telephone control unit, then turn the ignition switch to ON (II) and recheck the audio-HVAC subdisplay unit.
Are the messages cleared?
YES -
Replace the original Hands Free Telephone control unit. ■
NO -
Replace the audio-HVAC subdisplay unit. ■