Navigation System Symptom Troubleshooting - Voice guidance cannot be heard
  1. Check for continuity between the following terminals of the navigation unit connector B (14P) and the audio unit connector B (20P).
    14P:
    20P:
    No. 4
    No. 12
    No. 5
    No. 11

Is there continuity?
YES -
Go to Step 10 .
NO -
There is an open in the circuit between the navigation unit and audio unit. Check for poor connections or loose terminals at the audio and navigation units. If a poor connection or loose terminal is found, replace the affected shielded harness.■