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 LAMP) 
   1. Connect the hand-held tester to the DLC3.
   2. Start the engine.
   3. Select "TRAC OFF LIGHT" in the ACTIVE TEST and operate the TRAC OFF indicator lamp on the hand-held tester.
   4. Check that "ON" and "OFF" of the TRAC OFF indicator lamp can be shown on the combination meter with the hand-held tester.
   VEHICLE CONDITION / TEST DETAILS REFERENCE
   
   

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

   1. NG : Go to step   4 
   2. OK : GO TO NEXT STEP. 
2. INSPECT TRACTION CONTROL SWITCH 
   1. Remove the traction control switch.
   2. Disconnect the traction control switch connector.
   3. Measure the resistance according to the table below.

   Standard: 

   SWITCH CONDITION AND SPECIFIED CONDITION
   
   

   Tester Connection	Switch Condition	Specified Condition
   +(T6-5) - -(T6-2)	Pushed (ON)	1 Ω or less
   +(T6-5) - -(T6-2)	Not pushed (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 WIRE HARNESS (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 table below.

   Standard: 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   CSW (S1 -43) - +(T6-5)	Below 1 Ω
   CSW (S1-43) - Body ground	10 kΩ or higher
   E (T6-2) - Body ground	Below 1 Ω

   Fig 2: Disconnecting Skid Control ECU Connector & TRAC Control Switch Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 
   2. OK : REPLACE BRAKE ACTUATOR ASSY (See  REPLACEMENT  ) 
   NOTE: When replacing the brake actuator assy, perform the zero point calibration (see CALIBRATION  ).
4. CHECK WIRE HARNESS (COMBINATION METER - SKID CONTROL ECU) 
   1. Disconnect the skid control ECU connector and combination meter connector.
   2. Measure the resistance according to the table below.

   Standard: 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   WT (S1-35) - (C11-30)	Below 1 Ω
   WT (S1-35) - Body ground	10 kΩ or higher

   Fig 3: Checking Wire Harness (Combination Meter - Skid Control ECU)

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