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Home >> Subaru >> 2016 >> BRZ Series.HyperBlue >> Repair and Diagnosis >> Brakes >> Traction Control >> Vehicle Stability Control (VSC) System >> Vehicle Stability Control System >> Precautions

Vehicle Stability Control System: Precautions

  1. Cautions for troubleshooting
    1. For malfunctions caused by a poor connection of terminals or parts, try reconnecting the relevant connector or parts. In some cases, this may temporarily or completely solve the problem.
    2. To locate the malfunctioning part, check the operational status, including the diagnostic code output and freeze frame data output at the time the malfunction occurred and record them before disconnecting each connector or removing/attaching the relevant parts Also, if a circuit open error code for instantaneous interruption monitoring is output, monitor instantaneous interruption before disconnecting connectors. (Refer to CURRENT DATA DISPLAY & SAVE  )
    3. Considering a possibility that system other than the brake control system is affecting the malfunction, check diagnostic codes for other systems.
  2. Precautions for handling and procedures
    1. Unless otherwise specified for the check procedures, make sure that IG is OFF before removing or attaching actuators and sensors.
    2. When the actuators and sensors have been removed or installed, perform a test mode check and diagnostic code output check to make sure that the normal display is output after all parts have been installed.
    3. Vehicle stability control-related parts adjustment may become faulty after removal or installation. Do not remove or install them unless necessary.
    4. When performing work related to Vehicle stability control, follow the instructions in this information and make sure to perform all preparation work and confirm completion of the work.
  3. Failsafe function
    1. If an error occurred in a part of ABS/TRC/Vehicle stability control/brake assist system, relevant warning light and indicator light illuminate. At the same time, ABS, TRC, Vehicle stability control, and brake assist system stop the operations.
      NOTE: EBD control continues as long as possible even when ABS control stops. If EBD control stops, the brake warning light illuminates.
  4. Precautions for diagnostic codes
    1. As for some of the diagnostic codes, the warnings cannot be cleared only by repairing faulty parts.
    2. To clear the warning, diagnostic codes must be cleared or the procedures below must be followed.

      Warning clearance procedures

      WARNING CLEARANCE PROCEDURES

      Diagnostic codes Procedures
      C1464
      C1465
      C1466
      C1467
      C146C
      1. Replacement with new one or repair
      2. IG ON
      3. Drive (20 km/h or more for 30 seconds) →ABS warning light goes OFF
      C1246
      1. Replacement with new one or repair
      2. Stop the vehicle for 5 seconds or longer with IG turned ON and lightly depress the brake pedal several times.
      3. Strongly depress the brake pedal 3 times for 3 seconds while driving at the speed of 50 km/h or more →ABS warning light goes OFF
      CAUTION:
      • Be careful to drive and stop the vehicle while the warning is being issued because the system does not have a fail-safe function.
      • Currently issued diagnostic codes are stored in memory again.
  5. Precautions for CAN communication
    1. Data communication in skid control computer (brake actuator assembly) uses CAN communication. If CAN communication line has a problem, a diagnostic code of communication line error is output.
    2. If a CAN communication error code is output, repair the cause of fault in the communication line and troubleshoot the Vehicle stability control system under normal data communication conditions.
    3. The length and route of each CAN communication line is specified. Therefore they cannot be fixed or repaired using bypass wire harness for a temporal fix or repair.
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