Audio System Symptom Troubleshooting - Audio system information does not display on the audio/navigation switch panel display unit (with navigation system)
  1. Measure the voltage between the audio/navigation switch panel 24P connector terminal No. 10 and body ground.
Is there less than 0.5 V?
YES -
Go to Step 6 .
NO -
Repair open in the wire between the audio/navigation switch panel 24P connector terminal No. 10 and body ground (G401). ■
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect audio unit connector B (20P) and the audio/navigation switch panel 24P connector.