Inspection Procedure

HINT:

Start the inspection from step  1 when using the hand-held tester and start from step  2 when 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.
      VEHICLE CONDITION / TEST DETAILS CHART
      
      

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

      OK: Turn the TRAC OFF indicator light on or off in accordance with the hand-held tester. 

   1. NG: Go to step   6 . 
   2. OK: GO TO NEXT STEP. 
2. INSPECT TRACTION CONTROL SWITCH 
   1. Remove the TRAC control switch.
   2. Disconnect the TRAC control switch connector T6.
   3. Measure the resistance according to the value (s) in the table below.

      Standard: 

      SPECIFICATION TESTER CONNECTION
      
      

      Tester Connection	Switch Condition	Specified Condition
      T6-4 - T6-1	Pushed in (ON)	Below 1 Ω
      T6-4 - T6-1	Released (OFF)	10 kΩ or 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 S27 and the TRAC control switch connector T6.
   2. Measure the resistance according to the value (s) in the table below.

      Standard: 

      SPECIFICATION TESTER CONNECTION
      
      

      Tester Connection	Specified Condition
      S27-43 (CSW) - T6-4 (+)	Below 1 Ω
      S27-43 (CSW) - Body ground	10 kΩ or higher
      T6-1 (E) - Body ground	Below 1 Ω

      Fig 2: Checking Harness And Connector (Skid Control ECU - TRAC Off Switch)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
   2. OK: GO TO NEXT STEP. 
4. INSPECT MULTIPLEX COMMUNICATION SYSTEM (SEE  HOW TO PROCEED WITH TROUBLESHOOTING  ) 
   1. NG: REPAIR MULTIPLEX COMMUNICATION SYSTEM 
   2. OK: GO TO NEXT STEP. 
5. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - ECM) 
   1. Disconnect the skid control ECU connector S27 and ECM connector E5.
   2. Measure the resistance according to the value (s) in the table below.

      Standard: 

      SPECIFICATION TESTER CONNECTION
      
      

      Tester Connection	Specified Condition
      S27-8 (TRC+) - E5-25 (TRC+)	Below 1 Ω
      S27-22 (TRC-) - E5-31 (TRC-)	Below 1 Ω
      S27-9 (ENG+) - E5-24 (ENG+)	Below 1 Ω
      S27-23 (ENG-) - E5-30 (ENG-)	Below 1 Ω

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

      Standard: 

      SPECIFICATION TESTER CONNECTION
      
      

      Tester Connection	Specified Condition
      S27-8 (TRC+) - Body ground	10 kΩ or higher
      S27-22 (TRC-) - Body ground	10 kΩ or higher
      S27-9 (ENG+) - Body ground	10 kΩ or higher
      S27-23 (ENG-) - Body ground	10 kΩ or higher

      Fig 3: Disconnecting Skid Control ECU Connector S27 And ECM Connector E5

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
   2. OK: GO TO NEXT STEP. 
6. INSPECT COMBINATION METER ASSEMBLY (SEE  HOW TO PROCEED WITH TROUBLESHOOTING  ) 
   1. NG: REPAIR OR REPLACE COMBINATION METER ASSEMBLY 
   2. OK: REPLACE ABS & TRACTION ACTUATOR ASSY (See  REPLACEMENT  )