KINETIC DYNAMIC SUSPENSION SYSTEM, Diagnostic DTC:C1851/51 and 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 No.

Detection Item

DTC Detection Condition

Trouble Area

C1851/51

Low Pressure Malfunction in Upside of KDSS System

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

  • Hydraulic circuit

  • Harness or connector

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

  • Stabilizer control ECU

C1853/53

High Pressure Malfunction in Upside of KDSS System

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

  • Hydraulic circuit

  • Harness or connector

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

  • Stabilizer control ECU

CAUTION / NOTICE / HINT

Tip:

  • 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.

      Result

      Result

      OK

      NG
    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

      Chassis > KDSS > Trouble Codes

      Result

      Result

      Proceed to

      No output

      A

      DTC C1812/12, C1831/31 and/or C1832/32 is output

      B
    B

    REPLACE 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. 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
    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.

      Result

      Result

      OK

      NG
    NG

    REPAIR HYDRAULIC CIRCUIT MALFUNCTIONS OR REPLACE PARTS AS NECESSARY

    OK

  5. RECONFIRM DTC

    1. Clear the DTCs.

      Click here

      Chassis > KDSS > Clear DTCs

    2. Check for DTCs.

      Click here

      Chassis > KDSS > Trouble Codes

      Result

      Result

      Proceed to

      DTC is not output

      A

      DTC is output

      B
    A

    USE SIMULATION METHOD TO CHECK

    Click hereClick hereClick here

    B

    REPLACE STABILIZER CONTROL ECU

    Click here