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. (Stereo component amplifier, Radio and player and Stereo component tuner)
1. NG : Go to step 4 .
2. OK : Go to next step.
Check stereo component amplifier.
PREPARATION:

Disconnect the stereo component amplifier 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 connector (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).
2. OK : Go to next step.
Check stereo component amplifier.
CHECK:

Check the voltage of terminals MUTE, N-MUTE and TMUT.

Check speaker cable for short circuit.

OK:

MUTE, N-MUTE, TMUT: See "Stereo component amplifier" of "TERMINAL OF ECU".
1. NG : Replace or repair wire harness connector (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).
2. OK : Replace stereo component amplifier (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).
Check "AVC-LAN communication circuit" (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).
CHECK:

Check continuity of the wire harness between the stereo component amplifier and the radio and player.

OK:

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