HYBRID CONTROL SYSTEM, Diagnostic DTC:P0C2D-858

DTC Code DTC Name
P0C2D-858 Auxiliary Transmission Fluid Pump Control Module Feedback Signal Low

DESCRIPTION

Refer to the description for DTC P0C29-865 Click here.

DTC No. INF Code DTC Detection Condition Trouble Area
P0C2D 858 Short to GND in the OPST (status signal line) circuit

  • Hybrid vehicle control ECU

  • Oil pump motor controller

  • Wire harness or connector

WIRING DIAGRAM

A01GXO6E02

INSPECTION PROCEDURE

Note

If P0C2E-859 is also output, troubleshoot P0C2E-859 first.

PROCEDURE


  1. CHECK HYBRID VEHICLE CONTROL ECU (CHECK WAVEFORM)


    1. A01GWFOE02

      Connect an oscilloscope between the hybrid vehicle control ECU terminals specified in the table below, and measure the waveform.

      Item Contents
      Terminal A76-33 (OPST) - A77-7(E1)
      Equipment Setting 5 V/DIV., 5 ms./DIV.
      Condition Power switch on (IG)
      Result
      Result Proceed to
      Waveform is flat, and is stuck on the GND side. A
      Normal B

    B

    CHECK FOR INTERMITTENT PROBLEMS Click here

    A

  2. CHECK CONNECTOR CONNECTION CONDITION (OIL PUMP MOTOR CONTROLLER CONNECTOR)

    Note

    Before disconnecting the connectors, confirm that they are properly connected by checking that the locking claws are engaged and that the connectors do not pull out.


    1. A01H1EDE01

      Check the connections of the oil pump motor controller connectors.

      OK
      The connectors are connected securely and there are no contact problems.

      Tech Tips

      For connector A, when connecting it, insert it with the locking lever in the raised position. Rotate the lever downward and make sure that the connector is pulled into its socket. When the locking lever is in its fully closed position, a click will be heard as its locking claws engage. After the click is heard, pull up on the connector to confirm that it is properly connected.


    NG

    CONNECT SECURELY

    OK

  3. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR)


    1. A01GW3PE01

      Check the connections of the hybrid vehicle control ECU connectors.

      OK
      The connectors are connected securely and there are no contact problems.

    NG

    CONNECT SECURELY

    OK

  4. CHECK HYBRID VEHICLE CONTROL ECU (VOLTAGE)


    1. Turn the power switch off.

    2. A01GYQIE08

      Disconnect connector A80 from the oil pump motor controller.

    3. Turn the power switch on (IG).

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      A80-7 (OPST) - Body ground Power switch on (IG) 7 to 12 V

      Note

      Turning the power switch on (IG) with the oil pump motor controller connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.


    NG

    CHECK HARNESS AND CONNECTOR Click here

    OK

  5. CHECK OIL PUMP MOTOR CONTROLLER


    1. A01GXHGE06

      Turn the power switch off.

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

      Standard resistance
      Tester Connection Switch Condition Specified Condition
      A80-7 (OPST) - Body ground Power switch off 10 kΩ or higher

    NG

    REPLACE OIL PUMP MOTOR CONTROLLER Click here

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

  6. CHECK HARNESS AND CONNECTOR


    1. A01H26FE07

      Turn the power switch off.

    2. Disconnect connector A76 from the hybrid vehicle control ECU.

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

      Standard resistance
      Tester Connection Switch Condition Specified Condition
      A76-33 (OPST) - Body ground and other terminals Power switch off 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

  7. CHECK FOR INTERMITTENT PROBLEMS


    1. Check for intermittent problems Click here.


    NG

    REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

    OK

    REPLACE OIL PUMP MOTOR CONTROLLER Click here