Inspection Procedure

WARNING: This page is about a different car, the 2002 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Before ECU replacement, see HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS to ensure all communication line/bus/wire issues have been eliminated as a cause of communication loss.

Check light sensor using TOYOTA hand-held tester:
Preparation
1. Connect the TOYOTA hand-held tester to the DLC3.
2. Turn ignition switch ON and TOYOTA 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 : 0.8-22.0 ms.

NOTE: 0.8-22.0 ms is the time required for light sensor to generate one cycle of frequency according to brightness.

When not using TOYOTA hand-held tester . See step 7-13 of INSPECTION :
1. NG : Replace the light sensor.
2. OK : Go to next step.
Check wire harness and connector between light sensor and theft deterrent ECU.
1. NG : Repair or replace wire harness or connector.
2. OK : Replace the theft deterrent ECU.