KINETIC DYNAMIC SUSPENSION SYSTEM, Diagnostic DTC:C1831/31, C1832/32

DTC Code DTC Name
C1831/31 Accumulator Solenoid Malfunction / Upside
C1832/32 Accumulator Solenoid Malfunction / Downside

DESCRIPTION

The stabilizer control ECU receives information from the steering angle sensor, skid control ECU (speed signal) and yaw rate and acceleration sensor via CAN communication. Based on this information, the stabilizer control ECU turns the stabilizer control solenoid valve (built into the stabilizer control with accumulator housing assembly) on or off.

DTC Code DTC Detection Condition Trouble Area

C1831/31

C1832/32

Either condition is met:


  • An open circuit signal is detected for a second continuously when current is not applied to the solenoid valve.

  • A short circuit signal is detected 8 seconds continuously when current is applied to the solenoid valve.

  • Harness or connector

  • Stabilizer control solenoid valve (Stabilizer control with accumulator housing assembly)

  • Stabilizer control ECU

WIRING DIAGRAM

A01DNPCE03

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (ACCUMULATOR VALVE)


    1. Turn the ignition switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the intelligent tester on.

    5. Enter the following menus: Chassis / KDSS / Data List.

    6. Select the item below in the Data List, and read the value displayed on the intelligent tester.

      KDSS
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Accumulator Valve (Downside)

      Stabilizer control solenoid valve (for Lower Chamber)/

      ON or OFF

      ON: Stabilizer control solenoid valve closed

      OFF: Stabilizer control solenoid valve open

      		 -
      Accumulator Valve (Upside)

      Stabilizer control solenoid valve (for Upper Chamber)/

      ON or OFF

      ON: Stabilizer control solenoid valve open

      OFF: Stabilizer control solenoid valve closed

      		 -

    7. Perform the Active Test of the stabilizer control ECU using the intelligent tester.

      KDSS
      Tester Display Test Part Control Range Diagnostic Note
      Accumulator Valve (Upside) Stabilizer control solenoid valve (for Upper Chamber) Valve ON / OFF

      The operating sound of the solenoid (clicking sound) can be heard

      ON: Data List ON

      OFF: Data List OFF

      When the Active Test is performed, the solenoid turns on for 3 seconds.
      Accumulator Valve (Downside) Stabilizer control solenoid valve (for Lower Chamber) Valve ON / OFF

      The operating sound of the solenoid (clicking sound) can be heard

      ON: Data List ON

      OFF: Data List OFF

      When the Active Test is performed, the solenoid turns on for 3 seconds.

    8. Check that the solenoid operating sound can be heard, and that the Data List display changes between ON and OFF in response to the Active Test.

      OK
      Solenoid operating sound can be heard and display changes between ON and OFF in response to Active Test.

    NG

    CHECK HARNESS AND CONNECTOR (STABILIZER CONTROL ECU - STABILIZER CONTROL SOLENOID VALVE) Click here

    OK

  2. RECONFIRM DTC


    1. Clear the DTCs Click here

    2. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC is output A
      DTC is not output B

    B

    USE SIMULATION METHOD TO CHECK Click here

    A

    REPLACE STABILIZER CONTROL ECU Click here

  3. CHECK HARNESS AND CONNECTOR (STABILIZER CONTROL ECU - STABILIZER CONTROL SOLENOID VALVE)


    1. Disconnect the stabilizer control ECU connector.

    2. Disconnect the Stabilizer control with accumulator housing assembly connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      G123-3 (SLAU) - R20-6 (SLAU) Always Below 1 Ω
      G123-3 (SLAU) - Body ground Always 10 kΩ or higher
      G123-1 (SLAL) - R20-5 (SLAL) Always Below 1 Ω
      G123-1 (SLAL) - Body ground Always 10 kΩ or higher
      R20-4 (AUG) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT STABILIZER CONTROL SOLENOID VALVE


    1. Disconnect the Stabilizer control with accumulator housing assembly connector.

    2. A01DPUYE01
      Text in Illustration
      *a

      Component without harness connected

      (Stabilizer Control with Accumulator Housing Assembly)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      C1831/31 (for Upper Chamber)
      Tester Connection Condition Specified Condition
      5 (SLAL) - 4 (AUG) 25°C (77°F) 24.3 to 25.7 Ω
      C1832/32 (for Lower Chamber)
      Tester Connection Condition Specified Condition
      6 (SLAU) - 4 (AUG) 25°C (77°F) 24.3 to 25.7 Ω

    3. Check for an operating sound of the stabilizer control solenoid valve.


      1. A01DQMFE01
        Text in Illustration
        *a

        Component without harness connected

        (Stabilizer Control with Accumulator Housing Assembly)

        for Upper Chamber:

        Connect terminal 5 (SLAL) to the positive (+) battery terminal, and terminal 4 (AUG) to the negative (-) battery terminal.

        OK
        An operating sound (click sound) can be heard.
      2. A01DMYDE01
        Text in Illustration
        *a

        Component without harness connected

        (Stabilizer Control with Accumulator Housing Assembly)

        for Lower Chamber:

        Connect terminal 6 (SLAU) to the positive (+) battery terminal, and terminal 4 (AUG) to the negative (-) battery terminal.

        OK
        An operating sound (click sound) can be heard.

    NG

    REPLACE STABILIZER CONTROL WITH ACCUMULATOR HOUSING ASSEMBLY Click here

    OK

    REPLACE STABILIZER CONTROL ECU Click here