Audio System Symptom Troubleshooting - Radio tuner does not change stations
  1. Check for continuity between audio/navigation switch panel 24P connector and body ground according to the table.
    Audio/navigation switch panel connector
    Wire color
    No. 3
    RED
    No. 8
    GRN

Is there continuity?
YES -
Repair short to body ground in the wire(s) between the audio unit and audio/navigation switch panel.■
NO -
Go to Step 8 .