Anti-Lock Brake System (For Sedan) Brake Warning Light Does Not Come On

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CAN COMMUNICATION SYSTEM

CHECK BRAKE WARNING LIGHT

PERFORM ACTIVE TEST USING TECHSTREAM (Indicat. Lamp Brake)

ANTI-LOCK BRAKE SYSTEM (for Sedan) - Brake Warning Light does not Come ON


DESCRIPTION

Refer to Brake Warning Light Remains ON (YARIS_NCP93 RM000000YHG0BRX_01.html).

WIRING DIAGRAM

Refer to Brake Warning Light Remains ON (YARIS_NCP93 RM000000YHG0BRX_02.html).

INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
1.CHECK CAN COMMUNICATION SYSTEM

  1. Check if CAN communication system DTCs are output (YARIS_NCP93 RM000001D3E00OX.html).

    Result
    Result
    		Proceed to
    DTC is not output
    		A
    DTC is output
    		B



B
GO TO CAN COMMUNICATION SYSTEM (YARIS_NCP93 RM000001D3500JX.html)
A


2.CHECK BRAKE WARNING LIGHT

  1. Disconnect the A15 brake actuator assembly (skid control ECU) connector.

  1. Turn the ignition switch to ON.

  1. Check that the brake warning light comes on.

    OK:
    brake warning light comes on.

  1. Reconnect the A15 brake actuator assembly (skid control ECU) connector.



NG
Go to step 3
OK

REPLACE BRAKE ACTUATOR ASSEMBLY (YARIS_NCP93 RM000001BXP02FX.html)

3.PERFORM ACTIVE TEST USING TECHSTREAM (Indicat. Lamp Brake)

  1. Turn the ignition switch off.

  1. Connect the Techstream to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the Techstream on.

  1. Enter the following menus: Body Electrical / Combination Meter / Active Test.

  1. According to the display on the Techstream, perform the Active Test.

    Combination Meter
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    Indicat. Lamp Brake
    		Brake warning light
    		OFF/ON
    		Perform the test with the vehicle stopped and the engine idling

  1. Check that the brake warning light on the combination meter turns on or off in accordance with the tester operation.

    OK:
    The brake warning light turns on or off in accordance with the tester operation.


NG
GO TO METER / GAUGE SYSTEM (YARIS_NCP93 RM000001DAG00QX.html)
OK

REPLACE BRAKE ACTUATOR ASSEMBLY (YARIS_NCP93 RM000001BXP02FX.html)