Inspection Procedure

WARNING: This page is about a different car, the 2003 Lexus GS 430 and 2003 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.

Check if ACC or DOME fuse is OK?
1. NG : Replace fuse.
2. OK : Go to next step
Check the radio receiver assembly.
PREPARATION:

Disconnect the radio receiver assembly connector.

CHECK:

Check voltage terminals +B.

OK:
1. +B: 10 - 14 V
CHECK:

Check voltage terminal ACC when turn ignition switch ACC or ON position.

OK:
1. ACC: 10 - 14 V
CHECK:

Check continuity terminal GND.

OK:
1. GND: Continuity
  1. NG : Replace or repair wire harness.
    HINT:
    
    When sending it for repair, leave as it is without attempting to take it out by force.
  2. OK : Replace the radio receiver assembly.