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 light sensor.
PREPARATION:
1. Connect the LEXUS hand-held tester to the DLC3.
2. Turn ignition switch ON and LEXUS hand-held tester main switch ON.
  CHECK:
  
  The value of the illumination rate should change in the following range when the light sensor is put in the light or covered by a hand.
  
  OK:
  
  0.8 ms - 22.0 ms
HINT:
- This is the time to be taken for the light sensor to generate one circle of frequency according to the brightness.
- When not using LEXUS hand-held tester (See INSPECTION ).
1. NG : Replace the light sensor.
2. OK : Go to next step.
Check wire harness and connector between light sensor and driver side J/B ECU (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).
1. NG : Repair or replace wire harness.
2. OK : Replace driver side J/B ECU.