Navigation System Symptom Troubleshooting - Voice control does not work/respond
  1. Check for continuity between HFT/navigation microphone 7P connector terminal No. 1 and body ground.
Is there continuity?
YES -
Go to Step 6 .
NO -
Repair an open in the wire between the HFT/navigation microphone and body ground (G501). ■
  1. Reconnect the HFT/navigation microphone 7P connector.
  1. Turn the ignition switch to ON (II).
  1. Go into the Self-Diagnosis Mode select Mic Icon Menu, and use the Mic Level test under Functional Setup to check the operation of the Talk and Back buttons.
Are the navigation TALK and BACK buttons operational?
YES -
Go to Step 9 .
NO -
Check for an open or short to ground on navigation unit connector C (16P) No. 10 terminal.■
  1. Use the Mic Level diagnostic under Functional Setup to check the operation of the microphone.
Is the microphone operational?
YES -
Check the operation of the voice control system (see the Navigation System Manual).■
NO -
Go to Step 10 .
  1. Disconnect the HFT control unit.
  1. Disconnect the navigation unit connector C (16P).