TRAC does not Operate [11/2018 - 02/2019]: Procedure

1. Check if the slip indicator light was illuminated when TRC (TRAC) did not operate.

   OK

   The slip indicator light was illuminated.

   HINT: 

   When a DTC is stored, the slip indicator light is illuminated and TRC (TRAC) does not operate due to the fail-safe function.

2. Check the operation condition of the VSC OFF switch when TRC (TRAC) did not operate.

   OK

   The VSC OFF switch had been operated to turn off TRC (TRAC) when TRC (TRAC) did not operate.

   HINT: 

   When the multi-information display in the combination meter assembly displays TRC (TRAC) OFF message, TRC (TRAC) does not operate.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END 

Result: 

NG 

See step  2

1. Operate the VSC OFF switch and check that the multi-information display in the combination meter assembly displays TRC (TRAC) OFF message and the VSC OFF indicator light illuminates in accordance with the operation of the switch.

   OK

   The multi-information display in the combination meter assembly displays TRC (TRAC) OFF message and the VSC OFF indicator light illuminates in accordance with the operation of the switch.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

INSPECT VSC OFF SWITCH CIRCUIT. Refer to  VSC OFF Switch Circuit [11/2018 - 02/2019]  

Result: 

OK 

See step  3

1. Turn the power switch off.
2. Perform the sensor check in Test Mode Procedure.

   Refer to TEST MODE PROCEDURE [11/2018 - 02/2019]

   Chassis > ABS/VSC/TRAC > Utility 

   Tester Display
   Signal Check

   OK

   Speed sensor Test Mode DTCs are cleared.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

INSPECT AND REPAIR MALFUNCTIONING SPEED SENSOR CIRCUIT 

Result: 

OK 

See step  4

1. Operate the VSC OFF switch and check that the system is not in TRC (TRAC) off mode or VSC off mode.
2. Check that no DTCs are output and that each warning light is not illuminated.
3. Start off the vehicle on a low friction surface and check that TRC (TRAC) operates when attempting to make the drive wheels slip.

   OK

   TRC (TRAC) operates when slip occurs when starting off.

   NOTE:

   • Even when the system is normal, VSC may not operate when the vehicle speed is low or TRC (TRAC) may not operate due to a malfunction. Make sure that only the drive wheels slip during the procedure.
   • When confirming that the slip indicator light blinks, do not slip the drive wheels longer than necessary. Whether TRC (TRAC) operated or not can be checked by reading the Freeze Frame Data when the system operated.
   • Pay attention to your surroundings when performing the procedure and depress the accelerator pedal with caution.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ] 

Result: 

NG 

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY 

Refer to REMOVAL [11/2018 - 02/2019]