Diagnosis System

1. Release the parking brake.
2. If the skid control ECU detects a malfunction, the ABS warning light and brake warning light will come on to warn the driver. The table below indicates which light will come on when there is a malfunction in a particular function.
   Fig 1: Identifying ABS Warning Light And Brake Warning Light Indicator

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   CONNECTOR TERMINALS REFERENCE CHART
   
   

   Item/Trouble Area	ABS System	EBD System	Skid Control ECU
   ABS Warning light	◦	◦	◦
   Brake Warning light	-	◦	◦
   ◦: Light ON -: Light OFF

   • The DTCs are simultaneously stored in memory. The DTCs can be read by connecting the SST (09843-18043) between the TC and CG terminals of the DLC3 and observing the blinking pattern of the ABS warning light, or by connecting Telecaster (See DIAGNOSIS SYSTEM  ).
   • This system has a sensor signal check function (TEST MODE).

HINT:

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

1. Release the parking brake.
2. Check that the ABS warning light and brake warning light come on when the ignition switch is turned on (IG) and go off in approximately 3 seconds.
3. If the warning lights do not come on or remain on, inspect the ABS warning light circuit and/or brake warning light circuit.
   DIAGNOSTIC TROUBLE CODE CHART
   
   

   Trouble Area	See procedure
   ABS warning light circuit (Remains on)	ABS WARNING LIGHT REMAINS ON
   ABS warning light circuit (Does not come on)	ABS WARNING LIGHT DOES NOT COME ON
   Brake warning light circuit (Remains on)	BRAKE WARNING LIGHT REMAINS ON
   Brake warning light circuit (Does not come on)	BRAKE WARNING LIGHT DOES NOT COME ON

   Fig 2: Identifying ABS Warning Light And Brake Warning Light Indicator

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002