VEHICLE STABILITY CONTROL SYSTEM TEST MODE PROCEDURE


  1. WARNING LIGHT AND INDICATOR LIGHT INITIAL CHECK


    1. When the ignition switch is turned to ON, check that the ABS warning light, brake system warning light (red indicator), VSC OFF indicator light, multi-information display (TRC OFF message) (for Color TFT Type), TRC OFF indicator (for Monochrome TFT Type), brake hold standby indicator light, brake hold operated indicator light and slip indicator light come on for approximately 3 seconds.

      Tech Tips


      • When the brake fluid level is low, the brake system warning light (red indicator) comes on.

      • If the skid control ECU (brake actuator assembly) stores a DTC, the ABS warning and slip indicator lights will come on.

      • If any of the indicators remains on or does not come on, proceed to troubleshooting for the light circuits listed below.

      Trouble Area See Procedure
      ABS warning light circuit (Remains on)

      Click here

      ABS warning light circuit (Does not come on)

      Click here

      Brake system warning light (red indicator) circuit (Remains on)

      Click here

      Brake system warning light (red indicator) circuit (Does not come on)

      Click here

      TRC OFF indicator light circuit (Remains on)

      Click here

      TRC OFF indicator light circuit (Does not come on)

      Click here

      VSC OFF indicator light circuit (Remains on)

      Click here

      VSC OFF indicator light circuit (Does not come on)

      Click here

      Slip indicator light circuit (Remains on)

      Click here

      Slip indicator light circuit (Does not come on)

      Click here

      Brake hold standby indicator light circuit

      Click here

      Brake hold operated indicator light circuit

      Click here

  2. SENSOR CHECK USING TEST MODE (SIGNAL CHECK) (When Using GTS)

    Note

    Perform Test Mode with the vehicle stopped.

    Tech Tips

    DTCs are stored if any malfunctions are detected during the check of each sensor.


    1. Procedure to enter Test Mode


      1. Turn the ignition switch off.

      2. Check that the steering wheel is centered.

      3. for Continuously Variable Transaxle:

        Check that the shift lever is in P.

      4. for Manual Transaxle:

        Apply the parking brake.

      5. Connect the GTS to the DLC3.

      6. Turn the ignition switch to ON.

      7. Turn the GTS on.

      8. Switch the skid control ECU (brake actuator assembly) to Test Mode using the GTS. Enter the following menus: Chassis / ABS/VSC/TRC/EPB / Utility / Signal Check.


        Chassis > ABS/VSC/TRC/EPB > Utility
        Tester Display
        Signal Check

      9. Check that the ABS warning and slip indicator lights come on for several seconds and then blink in the Test Mode pattern.

        Tech Tips

        If the ABS warning and slip indicator lights do not blink, inspect the ABS warning and slip indicator light circuits.

      10. Check the ABS sensors.

        Tech Tips

        Check that the ABS warning light is blinking in the Test Mode pattern before performing the following ABS sensor checks.

    2. VSC OFF Switch (electric parking brake switch assembly) Check


      1. Press the VSC OFF switch (electric parking brake switch assembly).

      2. Check that the VSC OFF indicator light comes on.

      3. Press the VSC OFF switch (electric parking brake switch assembly) again.

    3. Speed Sensor Check


      1. Drive the vehicle straight-ahead.

        Accelerate the vehicle to a speed of 45 km/h (28 mph) or more for several seconds.

        Tech Tips


        • The speed sensor check may not complete if wheelspin occurs.

        • The speed sensor check may not complete if the speed sensor check is started while turning the steering wheel.

        Note

        After the ABS warning light goes off, if the vehicle speed exceeds 80 km/h (50 mph), a sensor check code will be stored again.

        Decelerate or stop the vehicle before the speed reaches 80 km/h (50 mph).

      2. Check that the ABS warning light goes off.

        Tech Tips


        • The ABS warning light goes off when the sensor check has completed.

        • The ABS warning light comes on immediately after a malfunction has been detected during the speed sensor check.

      3. Stop the vehicle.

        Tech Tips

        When the sensor check has completed, the ABS warning light goes off while the vehicle is being driven, and blinks in the Test Mode pattern while the vehicle is stopped.

        Note

        If the sensor check has not completed, the ABS warning light will blink while the vehicle is being driven and the ABS will not operate.

    4. End of Sensor Check


      1. If the sensor checks have completed, the ABS warning light blinks in the Test Mode pattern when the vehicle is stopped and the ABS warning light goes off while the vehicle is being driven.

        Note

        If the sensor checks have not completed, the ABS warning light will blink while the vehicle is being driven and the ABS will not operate.

    5. Reading Sensor Check DTCs


      1. Read the DTCs by following the GTS screen.

        Note


        • If only DTCs other than Test Mode sensor check DTCs are displayed, repair the malfunctions and clear the DTCs.

        • If Test Mode sensor check DTCs and other DTCs are displayed or if only Test Mode sensor check DTCs are displayed, repair the malfunctions, clear the DTCs, and perform Test Mode inspection again.

        Tech Tips

        See "Sensor Check DTCs".

      2. Turn the ignition switch off and disconnect the GTS.

    6. Sensor Check DTCs

      ABS Sensor
      DTC No. Detection Item Trouble Area
      C1271 Low Output Signal of Front Speed Sensor RH

      • Front speed sensor RH

      • Sensor installation

      • Front speed sensor rotor RH (front axle hub sub-assembly RH)
      C1272 Low Output Signal of Front Speed Sensor LH

      • Front speed sensor LH

      • Sensor installation

      • Front speed sensor rotor LH (front axle hub sub-assembly LH)
      C1273 Low Output Signal of Rear Speed Sensor RH

      • Rear speed sensor RH (rear axle hub and bearing assembly RH)*1

      • Rear speed sensor RH*2

      • Sensor installation

      • Rear speed sensor rotor RH (rear axle hub and bearing assembly RH)
      C1274 Low Output Signal of Rear Speed Sensor LH

      • Rear speed sensor LH (rear axle hub and bearing assembly LH)*1

      • Rear speed sensor LH*2

      • Sensor installation

      • Rear speed sensor rotor LH (rear axle hub and bearing assembly LH)
      C1275 Abnormal Change in Output Signal of Front Speed Sensor RH Front speed sensor rotor RH (front axle hub sub-assembly RH)
      C1276 Abnormal Change in Output Signal of Front Speed Sensor LH Front speed sensor rotor LH (front axle hub sub-assembly LH)
      C1277 Abnormal Change in Output Signal of Rear Speed Sensor RH Rear speed sensor rotor RH (rear axle hub and bearing assembly RH)
      C1278 Abnormal Change in Output Signal of Rear Speed Sensor LH Rear speed sensor rotor LH (rear axle hub and bearing assembly LH)
      C1281 Master Cylinder Pressure Sensor Output Malfunction

      • Stop light switch assembly

      • Brake booster assembly

      • Master cylinder pressure sensor (brake actuator assembly)

      • *1: for 2WD

      • *2: for AWD

      Tech Tips

      The codes in this table are output only in Test Mode (signal check).