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 that DTC B1242 is not output.
1. NG : Check the RDA and RSSI lines.
2. OK : Go to next step.
Check wire harness.
PREPARATION:

Disconnect the connectors of the wireless door lock tuner and the Theft deterrent ECU.

CHECK:

Check continuity between terminals RCO of the wireless door lock tuner and RCO of the Theft deterrent ECU.

OK:

Continuity
1. NG : Repair or replace wire harness.
2. OK : Go to next step.
Check wireless door lock tuner.
CHECK:

Replace the wireless door lock tuner and check if it recovers normally.

OK:

It recovers normally.
1. NG : Proceed to next circuit inspection shown on problem symptoms tables (See PROBLEM SYMPTOMS TABLE ).
2. OK : Failure of the original wireless door lock tuner.