Inspection Procedure

NOTE:

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.

Check operation of the TRAC OFF indicator light .
1. Connect the hand-held tester to the DLC3.
2. Turn the ignition switch ON and push the hand-held tester main switch ON.
3. Select the ACTIVE TEST mode on the hand-held tester.
Check that "ON" and "OFF" of the TRAC OFF indicator light can be shown on the combination meter with the hand-held tester.
1. OK: Check and replace Skid Control ECU .
2. NG: Go to next step .
Check TRAC OFF switch .
1. Remove the TRAC OFF switch.
2. Disconnect the TRAC OFF switch connector.
Measure the resistance between terminals 1 and 2 of the TRAC OFF switch when the TRAC OFF switch is ON and OFF.

Fig 1: Testing TRAC Off Switch
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: See Fig 2 .

Fig 2: TRAC Off Switch Specifications
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. OK: Go to next step .
2. NG: Replace TRAC OFF switch .
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. OK: Go to next step .
2. NG: Repair or replace harness or connector .
Check TRAC OFF indicator light .
See combination meter troubleshooting. See TROUBLESHOOTING .
1. OK: Go to next step .
2. NG: Repair or replace bulb or combination meter .
Check for open and short circuit in harness and connector between terminal WT of Skid Control ECU and TRAC OFF indicator light, IG switch and TRAC OFF indicator light. See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE .
1. OK: Check and replace Skid Control ECU .
2. NG: Repair or replace harness or connector .