FixVault
Home › Subaru › 2020 › BRZ Limited, Automatic Trans › Repair and Diagnosis › Brakes › Traction Control › Vehicle Stability Control (VSC) System › Vehicle Stability Control System › ABS Warning Light Remains ON › Inspection steps

Inspection steps

CAUTION:
  • When the skid control computer (brake actuator ASSY) has been replaced, make sure to perform [VSC(VDC) Centering Mode]. (Refer to WORK SUPPORT )
  • Before performing troubleshooting, check the fuse for this circuit.
  1. Inspection of connection for each part
    1. Lightly shake the connectors and the wiring harness of the skid control computer (brake actuator ASSY) up/down/left/right, and check the illumination status for the ABS warning light.

      Criteria: The ABS warning light status does not change. 

      OK: Go to next step

      NG: Repair or replacement of wiring harness or connector

  2. Diagnostic code check (CAN communication system)
    1. Check CAN communication system. (Refer to HOW TO TROUBLESHOOT )
      RESULT DESCRIPTION

      Result Go to
      No output A
      Output exists B
      1. Go to next step
      2. Go to "CAN communication system (How to troubleshoot)" (Refer to HOW TO TROUBLESHOOT )
  3. Check wiring harness and connector (+BS, IG1, GND1, GND2 terminals)
    1. Check the connector of the skid control computer (brake actuator ASSY) for a trouble such as poor engagement or disconnection.

      Criteria: No trouble 

    2. Turn IG OFF and disconnect the connector A5 from the skid control computer (brake actuator ASSY).
    3. Check the case and terminal of the connector for deformation and/or corrosion.

      Criteria: No deformation or corrosion. 

    4. Check the voltage and resistance between terminals.

      Voltage 

      STANDARD VALUE SPECIFICATION

      Inspection terminals Inspection conditions Standard value
      A5-25(+BS) - chassis ground Always 11 to 14V
      A5-28(IG1) - chassis ground IG ON 11 to 14V

      Resistance 

      Inspection terminals Inspection conditions Standard value
      A5-38(GND1) - chassis ground Always Less than 1 Ω
      A5-13(GND2) - chassis ground Always Less than 1 Ω
      G12590975Courtesy of SUBARU OF AMERICA, INC.
      NOTE: If there is a malfunction in GND1 and GND2 terminals, check the ground point for looseness.

      OK: Go to next step

      NG: Repair or replacement of wiring harness or connector

      To meter & gauge system (How to troubleshoot) (Refer to HOW TO TROUBLESHOOT )

About FixVault