Diagnosis System

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: DIAGNOSIS SYSTEM

DIAGNOSIS SYSTEM

1. DIAGNOSIS





(a) If the skid control ECU detects a malfunction, the ABS, BRAKE, VSC TRAC warning lights and the VSC OFF, SLIP, downhill assist control indicator lights will come on to warn the driver.
The table below indicates which lights will come on when there is a malfunction in a particular function.





o: Light ON ●: Light ON (Blinking) -: Light OFF

- The DTCs are simultaneously stored in the memory. The DTCs can be read by connecting the SST between terminals TC and CG of the DLC3 and observing the blinking of the ABS and VSC TRAC warning lights, or by connecting Techstream.
- This system has a signal check function (test mode). The DTC can be read by connecting Techstream and observing the blinking of the ABS and VSC TRAC warning lights.

2. WARNING LIGHT AND INDICATOR LIGHT CHECK





(a) Release the parking brake lever.
NOTE:
When releasing the parking brake, set the chocks to hold the vehicle for safety.
HINT: When the parking brake is applied or the level of the brake fluid is low, the BRAKE warning light comes on.

(b) When the ignition switch is turned to the ON position, check that the ABS, BRAKE, and VSC TRAC warning lights and the VSC OFF, SLIP, and downhill assist control indicator lights come on for approximately 3 seconds.
HINT: If the warning light and indicator light check result is not normal, proceed to troubleshooting for the ABS, BRAKE, and VSC TRAC warning light circuits, and the VSC OFF, SLIP, and downhill assist control indicator light circuits.
If the indicator remains on, proceed to troubleshooting for the light circuit below.