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 cellular mobile telephone antenna. (Make sure telephone antenna is firmly attached to rear window glass. Check connection condition of connector, and whether or not harness is bitten or sharply bent.
- NG : Attach cellular mobile telephone antenna firmly.
- 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 : Go to next step.
- Check wire harness between cellular mobile phone and TEL ECU.
PREPARATION:
Disconnect the cellular mobile phone 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 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 navigation ECU and those of the TEL ECU.
OK:
Continuity
- Replace or repair wire harness or connector (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).
- OK : Replace TEL ECU (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).