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.

HINT:

In case of using the LEXUS hand-held tester, start the inspection from step 1 and in case of not using the LEXUS hand-held tester, start from step 2.

Check the headlight relay using LEXUS hand-held tester.
PREPARATION:

Connect the LEXUS hand-held tester to the DLC3.

CHECK:

Check that the headlight relay can operate in an ACTIVE TEST.

HINT:

If the headlight relay is normal, the headlight Lo-beam comes "ON".

In the case that the headlight relay is activated but the headlight Lo-beam does not come on, check the headlight circuit.
1. OK : Proceed to next circuit inspection shown on problem symptom table (See PROBLEM SYMPTOMS TABLE ).
2. NG : Go to next step.
Check the headlight relay (See INSPECTION ).
1. NG : Replace the headlight relay.
2. OK : Go to next step.
Check wire harness and connector between headlight relay and driver side J/B ECU (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).
1. NG : Repair or replace wire harness or connector.
2. OK : Proceed to next circuit inspection shown on problem symptom table (See PROBLEM SYMPTOMS TABLE ).