ELECTRONICALLY CONTROLLED BRAKE SYSTEM Slip Indicator Light Remains ON

DESCRIPTION

The skid control ECU assembly is connected to the combination meter assembly via CAN communication.

If the skid control ECU assembly stores a DTC, the slip indicator light comes on in the combination meter assembly.

The slip indicator light blinks during ABS, VSC and/or TRC operation.

When the system is malfunctioning, the slip indicator light comes on to warn the driver.

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WIRING DIAGRAM

Refer to ABS Warning Light Remains ON.

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CAUTION / NOTICE / HINT

Note


  • When replacing the skid control ECU assembly, perform initialization and calibration of the linear solenoid valve.

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  • Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check if CAN communication system DTCs are output.

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      Result
      Result Proceed to
      DTCs are not output. A
      DTCs are output. B

    B

    INSPECT CAN COMMUNICATION SYSTEM Click here

    A

  2. CHECK IF SKID CONTROL ECU ASSEMBLY CONNECTOR IS SECURELY CONNECTED


    1. Check if the skid control ECU assembly connector is securely connected.

      OK
      The connector is securely connected.
      Result
      Proceed to
      OK
      NG

    NG

    CONNECT CONNECTOR TO SKID CONTROL ECU ASSEMBLY CORRECTLY

    OK

  3. CHECK AUXILIARY BATTERY


    1. Check the auxiliary battery voltage.

      Standard Voltage
      Tester Connection Condition Specified Condition
      Auxiliary battery Power switch on (IG) 11 to 14 V
      Auxiliary battery Power switch on (READY) 11 to 15.5 V
      Result
      Proceed to
      OK
      NG

    NG

    CHARGE OR REPLACE AUXILIARY BATTERY

    OK

  4. CHECK HARNESS AND CONNECTOR (IG1 TERMINAL)


    1. Disconnect the A11 skid control ECU assembly connector.

    2. Turn the power switch on (IG).

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      A11-2 (IG1) - Body ground Power switch on (IG) 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 CIRCUIT)

    OK

  5. CHECK HARNESS AND CONNECTOR (GND TERMINAL)


    1. Turn the power switch off.

    2. Disconnect the A13, A10 and A12 skid control ECU assembly connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A10-1 (GND) - Body ground Always Below 1 Ω
      A11-3 (GND2) - Body ground Always Below 1 Ω
      A11-1 (GND3) - Body ground Always Below 1 Ω
      A12-3 (GND4) - Body ground Always Below 1 Ω
      A12-1 (GND5) - Body ground Always Below 1 Ω
      A13-3 (GND6) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT)

    OK

  6. READ VALUE USING GTS (SLIP INDICATOR LIGHT)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Select the Data List on the GTS.

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      Chassis > ABS/VSC/TRC > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Slip Indicator Light Slip indicator light ON or OFF

      ON: Indicator light on

      OFF: Indicator light off

      		 -

      Chassis > ABS/VSC/TRC > Data List
      Tester Display
      Slip Indicator Light

    4. Check the GTS display condition of the slip indicator light.

      Result
      Result Proceed to
      OFF is displayed. A
      ON is displayed. B

    A

    INSPECT METER / GAUGE SYSTEM Click here

    B

    REPLACE SKID CONTROL ECU ASSEMBLY for LHD: Click here
    REPLACE SKID CONTROL ECU ASSEMBLY for RHD: Click here