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 TPST (status signal line) circuit

  • Power management control ECU

  • Oil pump motor controller

  • Wire harness or connector

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0867-882 Click here.

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. CHECK POWER MANAGEMENT CONTROL ECU (CHECK WAVEFORM)


    1. A01FRX3E01
      Text in Illustration
      *a

      Component with harness connected

      (Power Management Control ECU)

      Connect an oscilloscope to the power management control ECU terminals specified in the table below, and measure the waveform.

      Item Contents
      Terminal A35-17 (TPST) - N91-6 (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

    2. Turn the power switch off.


    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 cannot be pulled out.


    1. A01FSZN

      Check the connections of the oil pump motor controller connectors Click here.

      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 (POWER MANAGEMENT CONTROL ECU CONNECTOR)


    1. A01FQC6E01
      Text in Illustration
      *A for LHD
      *B for RHD

      Check the connector connections and contact pressure of the relevant terminals for the power management control ECU connectors Click here.

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

    NG

    CONNECT SECURELY

    OK

  4. CHECK POWER MANAGEMENT CONTROL ECU (VOLTAGE)


    1. A01FULAE09
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Oil Pump Motor Controller)

      Disconnect the connector from the oil pump motor controller.

    2. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A44-7 (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.

    4. Turn the power switch off.

    5. Connect the oil pump motor controller connector.


    NG

    CHECK HARNESS AND CONNECTOR Click here

    OK

  5. CHECK OIL PUMP MOTOR CONTROLLER


    1. A01FVN8E01
      Text in Illustration
      *1 Oil Pump Motor Controller

      Disconnect the connector from the oil pump motor controller.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A44-7 (OPST) - Body ground Power switch off 10 kΩ or higher

    3. Connect the oil pump motor controller connector.


    NG

    REPLACE OIL PUMP MOTOR CONTROLLER Click here

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

  6. CHECK HARNESS AND CONNECTOR


    1. A01FQSYE33
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Power Management Control ECU)

      Disconnect the connector from the power management control ECU.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A35-17 (TPST) - Body ground and other terminals Power switch off 10 kΩ or higher

    3. Connect the power management control ECU connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

  7. CHECK FOR INTERMITTENT PROBLEMS

    Click here


    NG

    REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

    OK

    REPLACE OIL PUMP MOTOR CONTROLLER Click here