KINETIC DYNAMIC SUSPENSION SYSTEM, Diagnostic DTC:C1831/31 and 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 No.

Detection Item

DTC Detection Condition

Trouble Area

C1831/31

Accumulator Solenoid Malfunction / Upside

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

C1832/32

Accumulator Solenoid Malfunction / Downside

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

C215168E07

PROCEDURE

  1. READ VALUE USING INTELLIGENT TESTER (ACCUMULATOR VALVE)

    1. Turn the engine switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the engine switch on (IG).

    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.

      Chassis > KDSS > Data List

      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.

      Chassis > KDSS > Active Test

      Tester Display

      Measurement Item

      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.

      Chassis > KDSS > Active Test

      Active Test Display

      Accumulator Valve (Downside)

      Data List Display

      Accumulator Valve (Downside)

      Chassis > KDSS > Active Test

      Active Test Display

      Accumulator Valve (Upside)

      Data List Display

      Accumulator Valve (Upside)

    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.

      Result

      Result

      OK

      NG
    NG

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

    OK

  2. RECONFIRM DTC

    1. Clear the DTCs.

      Click here

      Chassis > KDSS > Clear DTCs

    2. Check for DTCs.

      Click here

      Result

      Result

      Proceed to

      DTC is output

      A

      DTC is not output

      B

      Chassis > KDSS > Trouble Codes

    A

    REPLACE STABILIZER CONTROL ECU

    Click here

    B

    USE SIMULATION METHOD TO CHECK

    Click hereClick hereClick 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

      G57-3 (SLAU) - R23-6 (SLAU)

      Always

      Below 1 Ω

      G57-3 (SLAU) - Body ground

      Always

      10 kΩ or higher

      G57-1 (SLAL) - R23-5 (SLAL)

      Always

      Below 1 Ω

      G57-1 (SLAL) - Body ground

      Always

      10 kΩ or higher

      R23-4 (AUG) - Body ground

      Always

      Below 1 Ω

      Result

      Result

      OK

      NG
    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. C215163C01

      *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

      Table 1. C1831/31 (for Upper Chamber)

      Tester Connection

      Condition

      Specified Condition

      5 (SLAL) - 4 (AUG)

      25°C (77°F)

      24.3 to 25.7 Ω
      Table 2. 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. C215165C01

      *a

      Component without harness connected

      (Stabilizer Control with Accumulator Housing Assembly)

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

      1. 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. C215164C01

        *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.

        Result

        Result

        OK

        NG
    OK

    REPLACE STABILIZER CONTROL ECU

    Click here

    NG

    REPLACE STABILIZER CONTROL WITH ACCUMULATOR HOUSING ASSEMBLY

    Click here