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.

Display check mode (Touch switch, Touch point screen).
1. NG : Replace multi display (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).
2. OK : Go to next step.
Check "AVC-LAN communication circuit" (See AVC-LAN (COMMUNICATION BUS) CIRCUIT ).
CHECK:

Check continuity of the wire harness between the navigation ECU and the multi display.

OK:

Continuity
1. NG : Replace or repair AVC-LAN circuit (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).
2. OK : Replace navigation ECU (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).