DESCRIPTION
When TRC or VSC is operating, the skid control ECU (brake actuator assembly) blinks the slip indicator light to inform the driver that slippage occurred.
When in VSC off mode, or TRC and VSC are disabled, the multi-information display in the combination meter assembly displays TRC OFF message and the VSC OFF indicator light illuminates to inform the driver.
When a communication malfunction with the ECM is detected, TRC and VSC are disabled. Also when the system is malfunctioning, TRC and VSC are disabled and the indicator lights of related systems illuminate.
CAUTION / NOTICE / HINT
NOTICE:
After replacing the skid control ECU (brake actuator assembly), perform "Calibration".
Click here
PROCEDURE
1. | BRAKE PROBLEM CHECK |
(a) Check if the slip indicator light was illuminated when TRC did not operate.
OK:
The slip indicator light was illuminated.
HINT:
When a DTC is stored, the slip indicator light is illuminated and TRC does not operate due to the fail-safe function.
(b) Check the operation condition of the VSC OFF switch (combination switch assembly) when TRC did not operate.
OK:
The VSC OFF switch (combination switch assembly) had been operated to turn off TRC when TRC did not operate.
HINT:
When the multi-information display in the combination meter assembly displays TRC OFF message, TRC does not operate.
OK | END |
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2. | CHECK VEHICLE |
(a) Operate the GTS to read the DTCs.
Chassis > Brake > Trouble Codes(b) Check the DTCs that are output.
OK:
DTCs are not output.
(c) Operate the VSC OFF switch (combination switch assembly) and check that the multi-information display in the combination meter assembly displays TRC 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 OFF message and the VSC OFF indicator light illuminates in accordance with the operation of the switch.
NG | INSPECT COMBINATION SWITCH ASSEMBLY |
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3. | PERFORM DEALER MODE (SIGNAL CHECK) INSPECTION (SPEED SENSOR CHECK) |
(a) Using the GTS, perform a Dealer Mode (Signal Check) inspection sensor check and check that speed sensor Dealer Mode (Signal Check) inspection items change from incomplete to complete.
Chassis > Brake > Utility Tester Display |
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Signal Check |
OK:
Speed sensor Dealer Mode (Signal Check) inspection items change from incomplete to complete.
NG | INSPECT AND REPAIR MALFUNCTIONING SPEED SENSOR CIRCUIT |
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4. | PERFORM OPERATION CHECK DRIVING |
(a) Operate the VSC OFF switch (combination switch assembly) and check that the system is not in TRC off mode or VSC off mode.
(b) Check that no DTCs are output and that each warning light is not illuminated.
(c) Start off the vehicle on a low friction surface and check that TRC operates when attempting to make the drive wheels slip.
OK:
TRC operates when slip occurs when starting off.
NOTICE:
Click here
OK | USE SIMULATION METHOD TO CHECK |
NG | REPLACE BRAKE ACTUATOR ASSEMBLY |
If a key is left in the vehicle, the functions of the key left in the vehicle are temporarily suspended to prevent theft of the vehicle.
To restore the functions, press the unlock button on the functions-suspended key in the vehicle.