Inspection Procedure

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

Check DTC of translate ECU. . See STEP c - In Case Of Not Using Hand-held Tester, Check The DTC Of Translate ECU .
1. If Output NG code, Repair ABS and VSC control system according to the code output.
2. If malfunction indicator light remains ON, Check if ECU is connected to malfunction indicator light.
Check translate ECU communication.
Reference: inspection using oscilloscope.

Preparation:
1. Remove the translate ECU.
2. Connect the oscilloscope to the terminal VSC+ (4) and GND (14) of the translate ECU harness side connector.
Check: Start the engine, and check the signal waveform.

Fig 1: Identifying Normal Signal Waveform
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Check and replace ABS & BA & TRAC & VSC ECU.

If NG , go to step 3.
Check for open and short circuit in harness and connector between each of terminals VSC+ and VSC- of translate ECU and ABS & BA & TRAC & VSC ECU. See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE .

NG: Repair or replace harness or connector.

OK: Check and replace ABS & BA & TRAC & VSC ECU.