Anti-Lock Brake System (For Sedan) Diagnosis System

Brake. Yaris. Ncp93, 131
Brake Control Dynamic Control Systems. Yaris. Ncp93, 131

  1. DESCRIPTION

  1. DIAGNOSIS

  1. WARNING LIGHT AND INDICATOR LIGHT INITIAL CHECK

Anti-Lock Brake System (For Sedan) -- Diagnosis System



DESCRIPTION
When troubleshooting a vehicle with the diagnosis system, the only difference from the usual troubleshooting procedure is connecting the Techstream to the vehicle and reading various data output from the vehicle's skid control ECU.
The skid control ECU records DTCs when the computer detects a malfunction in the computer itself or in its circuits.
To check the DTCs, connect the Techstream to the DLC3 on the vehicle. The Techstream enables you to clear the DTCs, activate the various actuators, and check the Freeze Frame Data and Data List.

  1. Check the battery voltage.

    Standard voltage:
    11 to 14 V
    If the voltage is below 11 V, recharge the battery before proceeding to the next step.

  2. Check the DLC3 (YARIS_NCP93 RM000000UZ209YX.html).


DIAGNOSIS

  1. If the skid control ECU detects a malfunction, the ABS warning and brake warning will blink in order to warn the driver.

  2. The DTCs are simultaneously stored in the memory. The DTCs can be read by connecting the SST between terminals 13 (TC) and 4 (CG) of the DLC3 and observing the blinking pattern of the ABS warning light, or by connecting an Techstream.

  3. This system has a Test Mode (signal check) function (YARIS_NCP93 RM000000XHT08HX.html).


WARNING LIGHT AND INDICATOR LIGHT INITIAL CHECK

  1. Release the parking brake.

    NOTICE:
    Before releasing the parking brake, move the shift lever to P (for automatic transaxle) or set chocks (for manual transaxle) to prevent the vehicle from rolling.
    HINT:
    When the parking brake is applied or the level of the brake fluid is low, the brake warning light comes on.

  2. When the ignition switch is turned to ON, check that the ABS warning and brake warning light 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 warning and brake warning light circuits.
    If the indicator remains on or does not come on, proceed to troubleshooting for the light circuits listed below.
    Trouble Area
    		See procedure
    ABS warning light circuit (Remains on)
    		YARIS_NCP93 RM000000XIH0BPX.html
    ABS warning light circuit (Does not come on)
    		YARIS_NCP93 RM000000XIQ0BNX.html
    Brake warning light circuit (Remains on)
    		YARIS_NCP93 RM000000YHG0BRX.html
    Brake warning light circuit (Does not come on)
    		YARIS_NCP93 RM000000YHH0BRX.html