STOP AND START SYSTEM, Diagnostic DTC:P0942

DTC Code DTC Name
P0942 Hydraulic Pressure Unit

DESCRIPTION

When the engine automatically stops, the front oil pump of the continuously variable transaxle also stops. For smooth starting of the vehicle, the hydraulic pressure in the continuously variable transaxle is maintained by driving the electric oil pump between the engine automatic stop and the vehicle start.

DTC No.

DTC Detection Condition


  1. Diagnosis Condition

  2. Malfunction Status

  3. Malfunction Time

  4. Other

 Trouble Area
P0942

  1. While the engine automatically stops with the shift lever in D.

  2. The belt clamping pressure is below the standard value.

  3. 10 seconds have passed since the engine automatically stops.

  4. 1trip detection logic

  • Continuously variable transaxle assembly

    (Oil pump motor)

  • Stop and start system

  • ECM

PROCEDURE


  1. CHECK DTC OUTPUT (STOP AND START SYSTEM)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Stop and Start / DTC.

    5. Check for DTCs of the stop and start system.

      Result
      Result Proceed to
      DTCs are not output A
      DTCs are output B

    B

    GO TO STOP AND START SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    A

  2. READ VALUE USING GTS (A/T OIL PRESSURE)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine and ECT / Data List.

    5. Read the Data List value when the engine is stopped due to stop and start system control.

      Tech Tips

      For operation conditions of the stop and start system Click here.

      Engine and ECT
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      A/T Oil Pressure

      Secondary oil pressure value/

      min.: -64 MPa

      max.: 63.998 MPa

      		 0.13 to 0.45 MPa: During Automatic Engine Stop -
      Result
      Result Proceed to
      Data display is not within Normal Condition range A
      Data display is within Normal Condition range B

    B

    REPLACE ECM Click here

    A

  3. REPLACE OIL PUMP WITH MOTOR ASSEMBLY

    Click here


    NEXT

  4. PERFORM INITIALIZATION


    1. Perform the initialization Click here.

    2. Check for DTCs again Click here.


    NEXT

    END

  5. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

  6. PERFORM INITIALIZATION


    1. Perform the initialization Click here.

    2. Check for DTCs again Click here.


    NEXT

    END