( TL19E00J10300000000FAAT08 )

Audio System Symptom Troubleshooting - Audio/navigation switch panel button illumination does not work (with navigation system)

1. With the headlight switch still on, measure the voltage between audio/navigation switch panel 24P connector terminal No. 23 and body ground.

Is there battery voltage?

YES | - | Check the connections at audio/navigation switch panel 24P connector. If all connections are OK, substitute a known-good audio/navigation switch panel , and recheck. If the symptom/indication goes away, replace the original audio/navigation switch panel. ■
NO | - | Repair open in the wire between the passenger's under-dash fuse/relay box and the audio/navigation switch panel.■