KINETIC DYNAMIC SUSPENSION SYSTEM, Diagnostic DTC:C1812/12

DTC Code DTC Name
C1812/12 Pressure Sensor Malfunction / Upside

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
C1812/12

One of the following conditions continues is met:


  • The sensor power source voltage (SBP1 terminal) is 4.3 V or less for 0.5 seconds with the ignition switch ON.

  • The sensor power source voltage (SBP1 terminal) is 5.5 V or higher for 0.5 seconds with the ignition switch ON.

  • The sensor output (SOP1 terminal) is 0.3 V or less for a second with the ignition switch ON.

  • The sensor output (SOP1 terminal) is 4.7 V or higher for a second with the ignition switch ON.

  • Harness or connector

  • Accumulator pressure sensor (Stabilizer control with accumulator housing assembly)

  • Stabilizer control ECU

WIRING DIAGRAM

A01DTOYE03

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (OIL PRESSURE SENSOR)

    Note


    • Perform the inspection on a level surface.

    • Perform the inspection with the vehicle empty.

    • Make sure that the wheels are on the ground and facing straight ahead.

    • Perform the inspection with the vehicle load completely on the suspension.


    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
      Oil Pressure Sensor

      Oil pressure sensor/

      Min.: -784.79 MPa (-8002.66 kgf/cm2, -113794.55 psi)

      Max.: 784.76 MPa (8002.35 kgf/cm2, 113790.20 psi)

      2.6 MPa (26.5 kgf/cm2, 377 psi) to 3.0 MPa (30.6 kgf/cm2, 435 psi): When vehicle stopped and fluid temperature 20°C (68°F)

      		 -

    7. Check the fluid pressure.

      OK
      2.6 MPa (26.5 kgf/cm2, 377 psi) to 3.0 MPa (30.6 kgf/cm2, 435 psi)

    NG

    INSPECT STABILIZER CONTROL ECU (SBP1 VOLTAGE) 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. INSPECT STABILIZER CONTROL ECU (SBP1 VOLTAGE)


    1. Connect the stabilizer control ECU connector.

    2. Disconnect the Stabilizer control with accumulator housing connector.

    3. A01DSP6E03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Stabilizer Control with Accumulator Housing Assembly)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      R20-3 (SBP1) - Body ground Ignition switch ON 4.75 to 5.25 V

    NG

    CHECK HARNESS AND CONNECTOR (STABILIZER CONTROL ECU - ACCUMULATOR PRESSURE SENSOR) Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (STABILIZER CONTROL ECU - ACCUMULATOR PRESSURE SENSOR)


    1. Disconnect the Stabilizer control ECU connector.

    2. Disconnect the Stabilizer control with accumulator housing connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G123-17 (SOP1) - R20-2 (SOP1) Always Below 1 Ω
      G123-17 (SOP1) - Body ground Always 10 kΩ or higher
      G123-6 (SGP1) - R20-1 (SGP1) Always Below 1 Ω
      G123-6 (SGP1) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT ACCUMULATOR PRESSURE SENSOR (OUTPUT VOLTAGE)


    1. Connect the stabilizer control ECU connector.

    2. Connect the Stabilizer control with accumulator housing connector.

    3. A01DR2PE03
      Text in Illustration
      *a

      Component with harness connected

      (Stabilizer Control ECU)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      G123-17 (SOP1) - Body ground Ignition switch ON 0.4 to 4.6 V

    NG

    READ VALUE USING INTELLIGENT TESTER (OIL PRESSURE SENSOR) Click here

    OK

    REPLACE STABILIZER CONTROL ECU Click here

  6. READ VALUE USING INTELLIGENT TESTER (OIL PRESSURE SENSOR)


    1. Disconnect the Stabilizer control with accumulator housing connector.

    2. Connect the stabilizer control ECU connector.

    3. Connect the intelligent tester to the DLC3.

    4. Turn the ignition switch to ON.

    5. Turn the intelligent tester on.

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

    7. 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
      Oil Pressure Sensor

      Oil pressure sensor/

      Min.: -784.79 MPa (-8002.66 kgf/cm2, -113794.55 psi)

      Max.: 784.76 MPa (8002.35 kgf/cm2, 113790.20 psi)

      2.6 MPa (26.5 kgf/cm2, 377 psi) to 3.0 MPa (30.6 kgf/cm2, 435 psi): When vehicle stopped and fluid temperature 20°C (68°F)

      		 -
    8. A01DMQ0E03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Stabilizer Control with Accumulator Housing Assembly)

      Using a 1.5 V dry cell battery, connect the positive (+) lead to terminal 2 (SOP1) of the stabilizer control with accumulator housing connector and the negative (-) lead to terminal 1 (SGP1), and check that the Data List display changes.

      OK
      Data List display changes.

    NG

    REPLACE STABILIZER CONTROL ECU Click here

    OK

    REPLACE STABILIZER CONTROL WITH ACCUMULATOR HOUSING ASSEMBLY Click here

  7. CHECK HARNESS AND CONNECTOR (STABILIZER CONTROL ECU - ACCUMULATOR PRESSURE SENSOR)


    1. Disconnect the Stabilizer control ECU connector.

    2. Disconnect the Stabilizer control with accumulator housing connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G123-15 (SBP1) - R20-3 (SBP1) Always Below 1 Ω
      G123-15 (SBP1) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE STABILIZER CONTROL ECU Click here