Inspection Procedure
WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
- Service check mode. (Audio and rear A/C control switch) (See PRE-CHECK )
- CHEK: Troubleshoot for each diagnosis.
- OK : Replace audio and rear A/C control switch (See DISASSEMBLY ).
- NCON: Go to next step.
- Check "AVC-LAN communication circuit" (See AVC-LAN (COMMUNICATION BUS) CIRCUIT ).
CHECK:
Check continuity of the wire harness between the rear A/C amplifier and the audio and rear A/C control switch.
OK:
Continuity
- NG : Replace or repair AVC-LAN circuit (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).
- OK : Replace audio and rear A/C control switch (See DISASSEMBLY ).