Inspection Procedure

HINT:

Start the inspection from step 1 in case of using the hand-held tester and start from step  2 in case of not using the hand-held tester.

1. PERFORM ACTIVE TEST BY HAND-HELD TESTER (TRAC OFF INDICATOR LIGHT) 
   1. Connect the hand-held tester to the DLC3.
   2. Start the engine.
   3. Select the item "TRAC OFF LIGHT" in the ACTIVE TEST and operate the TRAC OFF indicator light on the hand-held tester.
   4. Check that "ON" and "OFF" of the TRAC OFF indicator light can be shown on the combination meter with the hand-held tester.
      TRAC OFF INDICATOR LIGHT REFERENCE
      
      

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

   1. NG: Go to step   4 
   2. OK: Go to next step. 
2. INSPECT TRACTION CONTROL SWITCH 
   1. Remove TRAC control switch.
   2. Disconnect TRAC control switch connector.
   3. Measure the resistance according to the value (s) in the table below.

      Standard: 

      TRACTION CONTROL SWITCH RESISTANCE
      
      

      Tester Connection	Switch Condition	Specified Condition
      +(T3 - 5) - (T3 - 2)	Pushed in (ON)	1 Ω or less
      	Released (OFF)	10 kΩor higher

      Fig 1: Inspecting Traction Control Switch

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG: REPLACE TRACTION CONTROL SWITCH 
   2. OK: Go to next step. 
3. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - TRAC OFF SWITCH) 
   1. Disconnect the skid control ECU connector and the TRAC control switch connector.
   2. Measure the resistance according to the value (s) in the table below.

      Standard: 

      SKID CONTROL ECU - TRAC OFF SWITCH RESISTANCE
      
      

      Tester Connection	Specified Condition
      CSW (S3-43) - +(T3-5)	1 Ω or less
      CSW (S3-43) - Body ground	10 kΩor higher
      E (T3-2) - Body ground	1 Ω or less

      Fig 2: Identifying Skid Control ECU - TRAC Off Switch Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
   2. OK: REPLACE BRAKE ACTUATOR ASSY (See  BRAKE ACTUATOR ASSY  ) 
      NOTE: When replacing the brake actuator assy, perform the zero point calibration (See  CALIBRATION  ).
4. CHECK HARNESS AND CONNECTOR (COMBINATION METER - SKID CONTROL ECU) 
   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: 

      COMBINATION METER - SKID CONTROL ECU RESISTANCE
      
      

      Tester Connection	Specified Condition
      WT (S3-35) - (C6-30)	1 Ω or less

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

      Standard: 

      COMBINATION METER - SKID CONTROL ECU RESISTANCE
      
      

      Tester Connection	Specified Condition
      WT (S3-35) - Body ground	10 kΩor higher

      Fig 3: Identifying Combination Meter - Skid Control ECU Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
   2. OK: REPAIR OR REPLACE COMBINATION METER ASSEMBLY