KINETIC DYNAMIC SUSPENSION SYSTEM, Diagnostic DTC:C1851/51, C1853/53

DTC Code DTC Name
C1851/51 Low Pressure Malfunction in Upside of KDSS System
C1853/53 High Pressure Malfunction in Upside of KDSS System

DESCRIPTION

In the KDSS hydraulic circuit, the fluid is contained under pressure. If the fluid temperature is 20°C (68°F), the pressure is approximately 3.0 MPa (30.6 kgf/cm2, 435 psi).

DTC Code DTC Detection Condition Trouble Area
C1851/51

The sensor output is 0.9 MPa (9.2 kgf/cm2, 130 psi) or less for 5 min. continuously with the ignition switch ON.

  • Hydraulic circuit

  • Harness or connector

  • Accumulator pressure sensor or stabilizer control solenoid valve (Stabilizer control with accumulator housing assembly)

  • Stabilizer control ECU
C1853/53

The sensor output is 8.8 MPa (89.7 kgf/cm2, 1276 psi) or more for 20 sec. continuously with the ignition switch ON.

INSPECTION PROCEDURE

Tech Tips


  • When these DTCs are output, perform the hydraulic circuit inspection first Click here.

  • If the DTCs cannot be cleared even after the hydraulic circuit inspection, perform the electrical circuit inspection by following the procedures below.

PROCEDURE


  1. INSPECT FOR FLUID LEAK


    1. Inspect for fluid leaks Click here.

      OK
      No fluid leaks.

    NG

    REPAIR FLUID LEAK OR REPLACE PARTS AS NECESSARY

    OK

  2. CHECK ANY OTHER DTCS OUTPUT (DTC C1812/12, C1831/31 AND/OR C1832/32)


    1. Check if DTC C1812/12, C1831/31 and/or C1832/32 is output Click here.

      Result
      Result Proceed to
      No output A
      DTC C1812/12, C1831/31 and/or C1832/32 is output B

    B

    REPAIR CIRCUITS INDICATED BY OUTPUT DTCS Click here

    A

  3. INSPECT STABILIZER CONTROL SOLENOID VALVE (CHECK IF VALVE STUCK)


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

    2. 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

  4. INSPECT FOR CLOGS IN HYDRAULIC CIRCUIT


    1. Bleed air and check that the hydraulic circuit is not clogged Click here.

      OK
      Hydraulic circuit is not clogged.

    NG

    REPAIR HYDRAULIC CIRCUIT MALFUNCTIONS OR REPLACE PARTS AS NECESSARY

    OK

  5. RECONFIRM DTC


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

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

    B

    REPLACE STABILIZER CONTROL ECU Click here

    A

    USE SIMULATION METHOD TO CHECK Click here