ACTIVE STABILIZER SUSPENSION SYSTEM, Diagnostic DTC:C190C, C190D

DTC Code DTC Name
C190C Rear Metal Board Overheat
C190D Rear Control Board Overheat

DESCRIPTION

If overheating of the rear active stabilizer control ECU's metal board or control board is detected, control is stopped to prevent abnormal overheating, and DTC C190C and/or C190D 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
C190C Temperature of rear active stabilizer control ECU metal board is more than 135°C (275°F)

  • Overheating in area around rear active stabilizer control ECU

  • Rear active stabilizer control ECU
C190D Temperature of rear active stabilizer control ECU control board is more than 135°C (275°F)

  • Overheating in area around rear active stabilizer control ECU

  • Rear 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 rear 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 SURROUNDING CONDITIONS (AMBIENT TEMPERATURE)


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

      Tech Tips

      If there are factors causing a high temperature in the rear 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 rear active stabilizer control ECU with the front 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 front stabilizer DTC is displayed, it can be determined that the rear 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 REAR 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 front stabilizer DTCs Click here.

      OK
      DTC C1934 and/or C1935 are not output

    NG

    REPLACE REAR 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)