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 microphone.
- NG : Replace microphone (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).
- OK : Go to next step.
- Check overhead J/B. (See INSPECTION
)
- NG : Replace overhead J/B (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).
- OK : Go to next step.
- Check wire harness between overhead J/B and telephone transceiver and speaker relay.
PREPARATION:
Disconnect the overhead J/B and telephone transceiver and speaker relay connectors.
CHECK:
Check continuity of the wire harness between terminals of the overhead J/B and those of the telephone receiver and speaker relay.
OK:
Continuity
- NG : Replace or repair wire harness or connector (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).
- OK : Go to next step.
- Check wire harness between navigation ECU and telephone transceiver and speaker relay.
PREPARATION:
Disconnect the navigation ECU and telephone transceiver and speaker relay connectors.
CHECK:
Check continuity of the wire harness between terminals of the navigation ECU and those of the telephone receiver and speaker relay.
OK:
Continuity
- NG : Replace or repair wire harness or connector (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).
- OK : Replace telephone transceiver and speaker relay (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).