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.
   ACTIVE TEST
   
   

   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.

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

   Fig 1: Disconnecting Connector From Skid Control ECU

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. 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 the table below.

   Standard: 

   TESTER CONNECTION SPECIFIED CONDITION (1 OF 4)
   
   

   Tester Connection	Switch Condition	Specified Condition
   T6-4 - T6-1	Pushed in (ON)	Below 1 Ω
   	Released (OFF)	10 kΩ or higher

   Fig 2: Inspecting Traction Control Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. 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 the table below.

   Standard: 

   TESTER CONNECTION SPECIFIED CONDITION (2 OF 4)
   
   

   Tester Connection	Specified Condition
   S1-43 (CSW) - T6-4 (+)	Below 1 Ω
   S1-43 (CSW) - Body ground	10 kΩ or higher
   T6-1 (E) - Body ground	Below 1 Ω

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to Next Step. 

REPLACE BRAKE ACTUATOR ASSY (SEE  REPLACEMENT  ) 

1. Disconnect the skid control ECU connector S1 and combination meter connector C8.
2. Measure the resistance according to the value (s) in the table below.

   Standard: 

   TESTER CONNECTION SPECIFIED CONDITION (3 OF 4)
   
   

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

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

   Standard: 

   TESTER CONNECTION SPECIFIED CONDITION (4 OF 4)
   
   

   Tester Connection	Specified Condition
   S1-35 (WT) - Body ground	10 kΩ or higher

   Fig 4: Checking Harness And Connector (Skid Control ECU - Combination Meter)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to Next Step. 

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

1. NG: REPAIR OR REPLACE COMBINATION METER ASSEMBLY (SEE  HOW TO PROCEED WITH TROUBLESHOOTING  ) 

OK: REPLACE BRAKE ACTUATOR ASSY (SEE  REPLACEMENT  )