ACTIVE STABILIZER SUSPENSION SYSTEM, Diagnostic DTC:C1934, C1935

DTC Code DTC Name
C1934 Front Metal Board Overheat
C1935 Front Control Board Overheat

DESCRIPTION

If overheating of the front active stabilizer control ECU's metal board or control board is detected, control is stopped to prevent abnormal overheating, and DTC C1934 and/or C1935 are output. The metal board and control board have temperature sensors for detecting overheating. If the temperature returns to normal, the system returns to normal operation.

DTC Code Detection Condition Trouble Area
C1934 Temperature of front active stabilizer control ECU metal board is more than 135°C (275°F)

  • Overheating in area around front active stabilizer control ECU

  • Front active stabilizer control ECU
C1935 Temperature of front active stabilizer control ECU control board is more than 135°C (275°F)

  • Overheating in area around front active stabilizer control ECU

  • Front active stabilizer control ECU

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK MULTI-INFORMATION DISPLAY


    1. Turn the power switch OFF and wait 30 minutes or more.

    2. Check if "Check Active Stabilizer Suspension System" is still displayed on the multi-information display.

      Tech Tips

      30 minutes is the approximate amount of time that is required for the front active stabilizer control ECU to cool down sufficiently.

      Result
      Result Proceed to
      Displayed A
      Not displayed B

    B

    INTERCHANGE FRONT AND REAR ACTIVE STABILIZER CONTROL ECU ASSEMBLY Click here

    A

  2. INSPECT CONDITIONS (SURROUNDING TEMPERATURE)


    1. Check the temperature around the front active stabilizer control ECU.

      Tech Tips

      If there are factors causing a high temperature in the front active stabilizer control ECU, eliminate those factors, wait for the ECU to cool down, and recheck for the DTC.

      OK
      No factors causing high temperatures

    NG

    REPAIR MALFUNCTIONING AREA

    OK

  3. INTERCHANGE FRONT AND REAR ACTIVE STABILIZER CONTROL ECU ASSEMBLY


    1. Turn the power switch OFF.

    2. Interchange the front active stabilizer control ECU with the rear active stabilizer control ECU, and install them securely.

      Tech Tips


      • Interchange the front and rear active stabilizer control ECUs and check for DTCs. After interchanging the ECUs, if a rear stabilizer DTC is displayed, it can be determined that the front active stabilizer control ECU is malfunctioning.

      • For the ECU removal and installation procedures, refer to the front ECU procedures Click here or the rear ECU procedures Click here.


    NEXT

  4. CLEAR DTC


    1. Turn the power switch OFF.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the power switch ON (IG) and the tester ON.

    4. Clear the DTC Click here.


    NEXT

  5. CHECK OPERATION OF FRONT ACTIVE STABILIZER CONTROL ECU ASSEMBLY


    1. Turn the power switch OFF.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the power switch ON (READY) and wait 30 seconds or more. Then check for rear stabilizer DTCs Click here.

      OK
      DTC C190C and/or C190D are not output

    NG

    REPLACE FRONT ACTIVE STABILIZER CONTROL ECU ASSEMBLY Click here

    OK

    RETURNS TO NORMAL OPERATION (SYSTEM RETURNS TO NORMAL DUE TO RETURN OF METAL BOARD OR CONTROL BOARD TO NORMAL TEMPERATURE)