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 security indicator using LEXUS hand-held tester.
PREPARATION:

Connect the LEXUS hand-held tester to the DLC3.

CHECK:

Check that the theft deterrent in the indicator lights in ACTIVE TEST.
1. OK : Proceed to next circuit inspection shown in problem symptoms table (See PROBLEM SYMPTOMS TABLE ).
2. NG : Go to next step.
Check security indicator.
CHECK:

Connect the positive (+) lead from the battery to terminal 6 and negative (-) lead to terminal 7, and check that the warning light lights up.

OK:

Indicator light lights up.

Fig 1: Connecting Positive (+) Lead From Battery To Terminal 6 And Negative (-) Lead To Terminal 7
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1. NG : Replace rheostat (w/Security indicator).
2. OK : Go to next step.
Check wire harness and connector between theft deterrent ECU and indicator, indicator and body ground (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 in problem symptoms table (See PROBLEM SYMPTOMS TABLE ).