ACTIVE STABILIZER SUSPENSION SYSTEM, Diagnostic DTC:C1905

DTC Code DTC Name
C1905 Timeout Initialization Check of Rear Actuator

DESCRIPTION

Immediately after turning the power switch ON (READY), the rear active stabilizer control ECU checks the condition of the active stabilizer suspension system. If there is a malfunction during the check, the initial check does not complete, resulting in the output of DTC C1905. Also, the initial check can determine if the rear active stabilizer control ECU is in the front or rear of the vehicle, and if the front active stabilizer control ECU is in the front or rear of the vehicle. This DTC is output by a normally recognized rear active stabilizer control ECU when a malfunction in the front side occurs.

DTC Code Detection Condition Trouble Area
C1905 Immediately after power switch is turned ON (READY), initial check is started but does not complete after 30 seconds have elapsed

  • Harness or connector

  • Power steering system

  • Front active stabilizer control actuator

  • Front active stabilizer control ECU

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK CONNECTOR CONNECTION CONDITION


    1. Turn the power switch OFF.

    2. Inspect the condition of the front active stabilizer control ECU connector terminal.

      OK
      Connector and terminal are not deformed or damaged. Terminal is not loose or corroded.

      Tech Tips

      The harness from the front active stabilizer control actuator to the front active stabilizer control ECU is part of the front active stabilizer control actuator. If the harness is damaged and cannot be repaired, replace the front active stabilizer control actuator assembly Click here.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK DTC (POWER STEERING SYSTEM)


    1. Turn the power switch OFF.

    2. Connect the intelligent tester to the DLC3.

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

    4. Check that power steering system DTCs are not output Click here.

      OK
      DTC is not output.

    NG

    GO TO POWER STEERING SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) Click here

    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 front stabilizer DTC is displayed, it can be determined that the front active stabilizer control ECU is malfunctioning. If no DTC is output, the front active stabilizer control actuator 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 front stabilizer DTCs Click here.

      OK
      DTC C192D is not output

    NG

    REPLACE FRONT ACTIVE STABILIZER CONTROL ECU ASSEMBLY Click here

    OK

    REPLACE FRONT ACTIVE STABILIZER CONTROL ACTUATOR ASSEMBLY Click here