Diagnosis System

1. If the skid control ECU detects a malfunction, the ABS, BRAKE, VSC warning lights and SLIP indicator light will come on to warn the driver. The table below indicates which lights will come on when there is a malfunction in a particular function.

Fig 1: Identifying ABS, BRAKE, VSC Warning Lights And Slip Indicator Light

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

• The DTCs are simultaneously stored in the memory. The DTCs can be read by connecting the SST between terminals TC and CG of the DLC3 and observing the blinking of the ABS and VSC warning lights, or by connecting Techstream.
• This system has a signal check function (See TEST MODE PROCEDURE ).

The DTC can be read by connecting Techstream and observing the blinking of the ABS and VSC warning lights.

1. Release the parking brake.
   NOTE: When releasing the parking brake, set chocks to hold the vehicle for safety.

   HINT:

   When the parking brake is applied or the level of the brake fluid is low, the brake warning light comes on.

2. When the ignition switch is turned on (IG), check that the ABS, BRAKE, VSC warning lights and the SLIP indicator light come on for approximately 3 seconds.

Fig 2: Identifying Warning Light And Indicator Light

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

If the warning light and indicator light check result is not normal, proceed to troubleshooting for the ABS, BRAKE, VSC warning light circuits, and SLIP indicator light circuit.

If the indicator remains on, proceed to troubleshooting for the light circuit below.