Inspection Procedure

WHEN USING HAND-HELD TESTER: 

1. Connect the hand-held tester to the DLC3.
2. Start the engine.
3. Select the "TRAC OFF LIGHT" in the ACTIVE TEST and operate the TRAC OFF indicator light on the hand-held tester.
   VSC OFF INDICATOR LIGHT (USING HAND-HELD TESTER)
   
   

   Item	Vehicle Condition / Test Details	Diagnostic Note
   VSC / TRAC OFF IND	Turns VSC / TRAC OFF indicator ON / OFF	Observe combination meter

4. Check that "ON" and "OFF" of the TRAC OFF indicator light are shown on the combination meter with the hand-held tester.

OK: 

The TRAC OFF indicator 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 WT of the skid control ECU.
3. Turn the ignition switch to the ON position.
4. Check that the TRAC OFF indicator 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 WT. 

NG: Go to step 4 

OK: Go to next step 

1. Remove the traction control switch.
2. Disconnect the traction control switch connector T6.
3. Measure the resistance according to the value(s) in TRACTION CONTROL SWITCH  .

Standard: 

Fig 2: Inspecting Traction Control Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE TRACTION CONTROL SWITCH 

OK: Go to next step 

1. Disconnect the skid control ECU connector S1 and the traction control switch connector T6.
2. Measure the resistance according to the value(s) in SKID CONTROL ECU - TRACTION CONTROL SWITCH  .

Standard: 

Fig 3: Checking Harness And Connector (Skid Control ECU - Traction Control Switch)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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

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

   Standard: 

   SKID CONTROL ECU - COMBINATION METER (1 OF 2)
   
   

   Tester Connection	Specified Condition
   S1-35 (WT) - C8-15	Below 1

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

Standard: 

Fig 4: 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 the combination meter assy (See COMBINATION METER ).

NG: REPAIR OR REPLACE COMBINATION METER ASSEMBLY (See step 11 in  REPLACEMENT  ) 

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