Vehicle Stability Control System (For Sedan) Vsc Off 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

INSPECT SKID CONTROL ECU (CSW TERMINAL)

INSPECT COMBINATION METER ASSEMBLY

INSPECT VSC OFF SWITCH

CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - VSC OFF SWITCH)

VEHICLE STABILITY CONTROL SYSTEM (for Sedan) - VSC OFF Indicator Light does not Come ON


DESCRIPTION

The skid control ECU is connected to the combination meter via CAN communication.
Pressing the VSC OFF switch turns off traction control and pressing and holding this switch turns off traction and VSC controls. If VSC control turns OFF, the VSC OFF indicator light will come on.

WIRING DIAGRAM

Refer to VSC OFF Indicator Light Remains ON (YARIS_NCP93 RM000001FQO0AGX_02.html).

INSPECTION PROCEDURE

NOTICE:
  1. When replacing the brake actuator assembly, perform zero point calibration (YARIS_NCP93 RM000000XHR06QX.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 RM000001D3E00OX.html).

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


B
CHECK CAN COMMUNICATION SYSTEM (YARIS_NCP93 RM000001D3500JX.html)
A


2.INSPECT SKID CONTROL ECU (CSW TERMINAL)

  1. Turn the ignition switch off.



    Yaris. Ncp93, 131.Brake Control Dynamic Control Systems.Anti-Lock Brake System (For Sedan).Vehicle Stability Control System (For Sedan) Vsc Off Indicator Light Does Not Come On

  1. Disconnect the A30 skid control ECU connector.

    Text in Illustration
    *1
    		Front view of wire harness connector
    (to Skid Control ECU)

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    A30-30 (CSW) - Body ground
    		VSC OFF Switch held ON
    		Below 1 Ω
    A30-30 (CSW) - Body ground
    		VSC OFF Switch OFF (Not pressed)
    		10 kΩ or higher


NG
Go to step 4
OK


3.INSPECT COMBINATION METER ASSEMBLY

  1. Reconnect the skid control ECU connector.

  1. Connect the Techstream to the DLC3.

  1. Perform Active Test of the combination meter using the Techstream (YARIS_NCP93 RM000001DAT00FX.html).

    OK:
    The VSC OFF indicator light turns ON or OFF in accordance with the Techstream.


NG
REPLACE COMBINATION METER ASSEMBLY (YARIS_NCP93 RM000000IN001JX.html)
OK

REPLACE BRAKE ACTUATOR ASSEMBLY (YARIS_NCP93 RM000001BXP02FX.html)

4.INSPECT VSC OFF SWITCH

  1. Disconnect the VSC OFF switch.



    Yaris. Ncp93, 131.Brake Control Dynamic Control Systems.Anti-Lock Brake System (For Sedan).Vehicle Stability Control System (For Sedan) Vsc Off Indicator Light Does Not Come On

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    6 (E) - 9 (+)
    		Switch is pushed in
    		Below 1 Ω
    6 (E) - 9 (+)
    		Switch is not pushed in
    		10 kΩ or higher
    Text in Illustration
    *1
    		Component without harness connected
    (VSC OFF Switch)


NG
REPLACE VSC OFF SWITCH (YARIS_NCP93 RM000002VOX013X.html)
OK


5.CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - VSC OFF SWITCH)

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A30-30 (CSW) - D82-9 (+)
    		Always
    		Below 1 Ω
    A30-30 (CSW) - Body ground
    		Always
    		10 kΩ or higher
    D82-6 (E) - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) (YARIS_NCP93 RM000000XHS09YX.html)