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. (TEL ECU) (See PRE-CHECK )
- NG : Troubleshoot for each diagnosis.
- OK : Go to next step.
- Check wire harness between navigation ECU and TEL ECU.
PREPARATION:
Disconnect the navigation ECU and TEL ECU connectors.
CHECK:
Check continuity of the wire harness between terminals of the cellular mobile telephone and those of the TEL ECU.
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 TEL ECU.
PREPARATION:
Disconnect the TEL ECU 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 at terminal GND.
OK:
GND: Continuity
- NG : Replace or repair wire harness (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).
- OK : Replace TEL ECU (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).