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.
   DATA LIST
   
   

   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 indicated on the combination meter when using the hand-held tester.

OK: The VSC warning light turns on or off in accordance with the hand-held tester. 

Fig 1: Checking VSC Warning Light

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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 the ECU.
3. Turn the ignition switch to the ON position.
4. Check the VSC warning light.

OK: Go to next step. 

NG: Go to step 2 

OK: REPLACE ABS & TRACTION ACTUATOR ASSY (SEE  REPLACEMENT  ) 

1. Disconnect the skid control ECU connector and combination meter connector.
2. Measure the resistance according to the value (s) in the table below.

   Standard: 

   TESTER CONNECTION SPECIFIED CONDITION (1 OF 2)
   
   

   Tester Connection	Specified Condition
   C18-1 - S1-36 (VSCW)	Below 1 Ω

3. Measure the resistance according to the value (s) in the table below.

   Standard: 

   TESTER CONNECTION SPECIFIED CONDITION (2 OF 2)
   
   

   Tester Connection	Specified Condition
   S1-36 (VSCW) - Body ground	10 kΩ or higher

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step. 

1. Check combination meter assy (see COMBINATION METER ).

NG: CHECK COMBINATION METER ASSY (SEE  HOW TO PROCEED WITH TROUBLESHOOTING  ) 

OK: REPLACE ABS & TRACTION ACTUATOR ASSY (SEE  REPLACEMENT  )