HYBRID CONTROL SYSTEM, Diagnostic DTC:P0C2E-859

DTC Code DTC Name
P0C2E-859 Auxiliary Transmission Fluid Pump Control Module Feedback Signal High

DESCRIPTION

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

DTC No. INF Code DTC Detection Condition Trouble Area
P0C2E 859 Open or short to +B in the OPST (status signal line) circuit

  • Hybrid vehicle control ECU

  • Oil pump motor controller

  • Wire harness or connector

  • OIL PMP relay

  • Fusible link block assembly

WIRING DIAGRAM

A01GZU8E02

Refer to the wiring diagrams for DTC P0C2D-858 Click here and P0C29-865 Click here.

INSPECTION PROCEDURE

Note

If P0C2D-858 is also output, troubleshoot P0C2D-858 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 +B 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 OIL PUMP MOTOR CONTROLLER


    1. A01GYQIE07

      Turn the power switch off.

    2. 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
      A80-5 (+B) - Body ground Power switch on (IG) 11 to 14 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 FUSIBLE LINK BLOCK ASSEMBLY (OIL PMP) Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - OIL PUMP MOTOR CONTROLLER)


    1. Turn the power switch off.

    2. A01GX7LE06

      Disconnect connector A76 from the hybrid vehicle control ECU.

    3. Disconnect connector A80 from the oil pump motor controller.

    4. Turn the power switch on (IG).

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      A76-33 (OPST) - Body ground Power switch on (IG) Below 1 V

      Note

      Turning the power switch on (IG) with the hybrid vehicle control ECU and oil pump motor controller connectors disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    6. Turn the power switch off.

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

      Standard resistance (Check for open)
      Tester Connection Switch Condition Specified Condition
      A76-33 (OPST) - A80-7 (OPST) Power switch off Below 1 Ω
      Standard resistance (Check for short)
      Tester Connection Switch Condition Specified Condition
      A76-33 (OPST) or A80-7 (OPST) - Body ground and other terminals Power switch off 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK HYBRID VEHICLE CONTROL ECU


    1. A01GY7QE07

      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
      A76-33 (OPST) - A78-1 (+B1) Power switch off 6.5 to 8.5 Ω

    NG

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

    OK

  7. CHECK IF PART IS CORRECTLY GROUNDED


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

      Standard resistance
      Tester Connection Switch Condition Specified Condition
      Oil pump motor controller - Body ground Power switch off Below 1 Ω

    NG

    REPAIR OR REPLACE OIL PUMP MOTOR CONTROLLER

    OK

    REPLACE OIL PUMP MOTOR CONTROLLER Click here

  8. CHECK FUSIBLE LINK BLOCK ASSEMBLY (OIL PMP)


    1. Check if there is an open circuit in the fusible link (OIL PMP) in the engine room No. 1 junction block.

      A01GYV6E01
      OK
      There is no open circuit in the fusible link (OIL PMP).

    NG

    REPLACE FUSIBLE LINK BLOCK ASSEMBLY

    OK

  9. CHECK HARNESS AND CONNECTOR


    1. Turn the power switch off.

    2. A01GZJNE01

      Remove the OIL PMP relay from the engine room No. 5 relay block.

    3. A01GZ0TE02

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

      Standard resistance (Check for open)
      Tester Connection Switch Condition Specified Condition
      Engine room No. 5 relay block OIL PMP relay terminal 3 - A80-5 (+B) Power switch off Below 1 Ω
      Engine room No. 5 relay block OIL PMP relay terminal 2 - Body ground Power switch off Below 1 Ω
      Standard resistance (Check for short)
      Tester Connection Switch Condition Specified Condition
      Engine room No. 5 relay block OIL PMP relay terminal 3 - Body ground Power switch off 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK RELAY (OIL PMP)


    1. A01GXTKE01

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

      Standard resistance
      Tester Connection Condition Specified Condition
      1 - 2 Always 151 to 203 Ω
      3 - 5 Auxiliary battery voltage is not applied between terminals 1 and 2. 10 kΩ or higher
      Auxiliary battery voltage is applied between terminals 1 and 2. Below 1 Ω

    NG

    REPLACE RELAY (OIL PMP) Click here

    OK

  11. CHECK HARNESS AND CONNECTOR


    1. Turn the power switch off.

    2. A01H28OE01

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      Engine room No. 5 relay block OIL PMP relay terminal 5 - Body ground Power switch off 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  12. CHECK HYBRID VEHICLE CONTROL ECU


    1. Turn the power switch on (IG).

    2. A01H28OE01

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      Engine room No. 5 relay block OIL PMP relay terminal 1 - Body ground Power switch on (IG) 11 to 14 V

    NG

    CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - ENGINE ROOM NO. 5 RELAY BLOCK) Click here

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

  13. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - ENGINE ROOM NO. 5 RELAY BLOCK)


    1. Turn the power switch off.

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

    3. A01GZ9VE02

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

      Standard resistance (Check for open)
      Tester Connection Switch Condition Specified Condition
      A76-24 (OPM2) - Engine room No. 5 relay block OIL PMP relay terminal 1 Power switch off Below 1 Ω
      Standard resistance (Check for short)
      Tester Connection Switch Condition Specified Condition
      A76-24 (OPM2) or Engine room No. 5 relay block OIL PMP relay terminal 1 - Body ground Power switch off 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

  14. CHECK FOR INTERMITTENT PROBLEMS


    1. Check for intermittent problems Click here.


    NG

    REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here