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.

Check stereo component tuner.
PREPARATION:

Disconnect the stereo component tuner connector.

CHECK:

Check the voltage of terminal +B.

OK:

+B: 10 - 14 V

CHECK:

Check the voltage of terminal ACC when the ignition switch is in ACC or ON position.

OK:

ACC: 10 - 14 V

CHECK:

Check continuity of terminal GND.

OK:

GND: Continuity
1. NG : Replace or repair wire harness (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).
2. OK : Go to next step.
Check wire harness between stereo component tuner and stereo component amplifier.
PREPARATION:

Disconnect the stereo component tuner and stereo component amplifier connectors.

CHECK:
1. Check continuity of the wire harness between terminal R+ of the stereo component tuner and terminal MR+ of the stereo component amplifier.
2. Check continuity of the wire harness between terminal R- of the stereo component tuner and terminal MR- of the stereo component amplifier.
3. Check continuity of the wire harness between terminal L+ of the stereo component tuner and terminal ML+ of the stereo component amplifier.
4. Check continuity of the wire harness between terminal L- of the stereo component tuner and terminal ML- of the stereo component amplifier.
OK:

Continuity
1. NG : Replace or repair wire harness (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).
2. OK : Replace stereo component tuner (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).