Inspection Procedure

HINT:

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

1. Check operation of TRAC OFF indicator light. 

   PREPARATION: 

   1. Connect the hand-held tester to the DLC3.
   2. Turn the ignition switch ON and press the hand-held tester main switch ON.
   3. Select the ACTIVE TEST mode on the hand-held tester.

   CHECK: 

   Check that the TRAC OFF indicator light can be turned ON and OFF on the combination meter using the hand-held tester.

   OK: 

   TRAC OFF INDICATOR LIGHT INSPECTION
   
   

   Item	Measurement Item / Range (Display)	Diagnostics Note
   TRAC OFF IND	Turns TRAC indicator ON/OFF	Observe combination meter

   1. NG: Go to step   4 . 
   2. OK: Go To Next Step 
2. Check TRAC OFF switch. 

   PREPARATION: 

   Remove the TRAC OFF switch.

   CHECK: 

   Measure the resistance between terminals 2 and 5 of the TRAC OFF switch when the TRAC OFF switch is ON and OFF.

   OK: 

   TRAC OFF SWITCH RESISTANCE
   
   

   TRAC OFF Switch	Resistance
   ON	Below 1 Ω
   OFF	1 MΩ or higher

   Fig 1: Checking TRAC OFF Switch Resistance

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG: Replace TRAC OFF switch. 
   2. OK: Go To Next Step 
3. Check for open and short circuit in harness and connector between terminal CSW of skid control ECU and TRAC OFF switch and body ground (See  HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE  ). 
   1. NG: Repair or replace harness and connector. 
   2. OK: Go To Next Step 
4. Check TRAC OFF indicator light. 

   See combination meter INSPECTION .

   1. NG: Repair or replace combination meter. 
   2. OK: Go To Next Step 
5. Check for open and short circuit in harness and connector between terminal WT of skid control ECU and TRAC OFF indicator light (See  HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE  ). 
   1. NG: Repair or replace harness and connector. 
   2. OK: Replace brake actuator assembly. 
   NOTE: When replacing the brake actuator assembly, perform the zero point calibration (see PRE-CHECK ).