Inspection Procedure

WHEN USING HAND-HELD TESTER: 

1. Connect the hand-held tester to the DLC3 and start the engine.
2. Select the "VSC WARN LIGHT" in the ACTIVE TEST and operate the VSC warning light on the hand-held tester.
   VSC WARNING LIGHT (USING HAND-HELD TESTER)
   
   

   Item	Vehicle Condition / Test Details	Diagnostic Note
   VSC WARN LIGHT	Turns VSC warning light ON / OFF	Observe combination meter

3. Check that "ON" and "OFF" of the VSC warning light are shown on the combination meter with the hand-held tester.

OK: 

The VSC warning light is turned ON or OFF in accordance with the hand-held tester. 

WHEN NOT USING HAND-HELD TESTER: 

1. Turn the ignition switch off and disconnect the connector from the skid control ECU.
2. Ground terminal VSCW of the skid control ECU.
3. Turn the ignition switch to the ON position.
4. Check that the VSC warning light comes on.
Fig 1: View Of Skid Control ECU Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: 

The light is turned ON or OFF in accordance with the connecting condition of terminals GND and VSCW. 

OK: REPLACE BRAKE ACTUATOR ASSY (See step 3 in  REPLACEMENT  ) 

NG: Go to next step 

1. Disconnect the skid control ECU connector S1 and combination meter connector C8.
2. Measure the resistance according to the value(s) in COMBINATION METER - SKID CONTROL ECU (1 OF 2)  .

   Standard: 

   COMBINATION METER - SKID CONTROL ECU (1 OF 2)
   
   

   Tester Connection	Specified Condition
   S1-36 (VSCW) - C8-14	Below 1

3. Measure the resistance according to the value(s) in COMBINATION METER - SKID CONTROL ECU (2 OF 2)  .

Standard: 

Fig 2: Checking Harness And Connector (Combination Meter - Skid Control ECU)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPAIR OR REPLACE COMBINATION METER ASSY (See step 11 in  REPLACEMENT  )