Vehicle Stability Control System (For Hatchback With Built-In Type Yaw Rate Sensor) Slip Indicator 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 SLIP INDICATOR LIGHT

READ VALUE USING TECHSTREAM (SLIP INDICATOR LIGHT)

VEHICLE STABILITY CONTROL SYSTEM (for Hatchback with Built-in Type Yaw Rate Sensor) - Slip Indicator Light does not Come ON


DESCRIPTION

The skid control ECU (brake actuator assembly) is connected to the combination meter via CAN communication.
The Slip indicator light blinks during VSC, TRAC operation.
If any of the following is detected, the Slip indicator light remains on:
  1. The skid control ECU (brake actuator assembly) connectors are disconnected from the brake actuator (skid control ECU).
  2. There is a malfunction in the skid control ECU (brake actuator assembly) internal circuit.
  3. There is an open in the harness between the combination meter and the skid control ECU (brake actuator assembly).
  4. The VSC, TRAC control system is defective.
    HINT:
    In same cases, the Techstream is used when the skid control ECU (brake actuator assembly) is abnormal.

WIRING DIAGRAM

Refer to Slip Indicator Light Remains ON (YARIS_NCP93 RM000000YHI091X_02.html).

INSPECTION PROCEDURE

NOTICE:
  1. When replacing the brake actuator assembly, perform zero point calibration (YARIS_NCP93 RM000000XHR078X.html).
  2. 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 RM000001RSW02PX.html).

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


B
CHECK CAN COMMUNICATION SYSTEM (YARIS_NCP93 RM000001RSO066X.html)
A


2.CHECK SLIP INDICATOR LIGHT

  1. Disconnect the skid control ECU connector.

  1. Turn the ignition switch to ON.

  1. Check that the Slip indicator light comes on.



NG
Go to step 3
OK

REPLACE BRAKE ACTUATOR ASSEMBLY (YARIS_NCP93 RM000001BXP02KX.html)

3.READ VALUE USING TECHSTREAM (SLIP INDICATOR LIGHT)

  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: Chassis / ABS/VSC/TRAC / Data List.

  1. According to the display on the Techstream, read the Data List.

    ABS/VSC/TRAC
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Slip Indicator Light
    		SLIP indicator light/OFF or ON
    		OFF: Indicator light off
    ON: Indicator light on
    		-

  1. When performing the Slip Indicator Light Active Test, check Slip Indicator Light in the Data List.


ABS/VSC/TRAC
Tester Display
Test Part
Control Range
Diagnostic Note
Slip Indicator Light
SLIP indicator light
Indicator light OFF/ON
Observe combination meter
[Vehicle condition]
Vehicle stopped

Result
Result
Proceed to
Data List Display
Data List Display when Performing Active Test ON/OFF Operation
ON
Changes between ON and OFF
A
Does not change between ON and OFF
B
OFF
Changes between ON and OFF
A
Does not change between ON and OFF
B


B
REPLACE BRAKE ACTUATOR ASSEMBLY (YARIS_NCP93 RM000001BXP02KX.html)
A

REPLACE COMBINATION METER ASSEMBLY (YARIS_NCP93 RM0000035EJ00BX.html)