Diagnosis System

1. If the skid control ECU detects a malfunction, the ABS/BRAKE warning lights and SLIP/CRAWL indicator lights and/or "Check VSC System" on the multi-information display 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 Warning And SLIP/CRAWL Indicator Lights

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

◦: Light on •: Light on (Blinking) -: Light off

• The DTCs are simultaneously stored in memory. The DTCs can be read by connecting SST between terminals 13 (TC) and 4 (CG) of the DLC3 and observing the blinking of the ABS warning light, or by connecting the Techstream.
• This system has a signal check function (test mode).

1. Release the parking brake lever.
   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 engine switch is turned on (IG), check that the ABS and BRAKE warning lights and the VSC OFF, SLIP and CRAWL indicator lights turn on and then turn off after the engine starts.

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

   TROUBLESHOOTING CHART
   
   

   Trouble Area	See Procedure
   ABS warning light circuit	ABS WARNING LIGHT REMAINS ON
   BRAKE warning light circuit	BRAKE WARNING LIGHT REMAINS ON
   VSC OFF indicator light circuit	VSC OFF INDICATOR LIGHT REMAINS ON
   SLIP indicator light circuit	SLIP INDICATOR LIGHT REMAINS ON
   CRAWL indicator light circuit	CRAWL INDICATOR LIGHT REMAINS ON

Fig 2: Identifying ABS/BRAKE Warning And SLIP/CRAWL Indicator Lights

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002