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

A000Y85E02

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

CAUTION / NOTICE / HINT

Note

If P0C2D-858 is also output, troubleshoot P0C2D-858 first.

PROCEDURE


  1. CHECK HYBRID VEHICLE CONTROL ECU (CHECK WAVEFORM)


    1. A000YXUE01
      *1 Component with harness connected: (Hybrid Vehicle Control ECU)

      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. A000V7FE04
      *1 Oil Pump Motor Controller

      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. A000XH7E01
      *1 Hybrid Vehicle Control ECU

      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. A000WQXE01
      *1 Front view of wire harness connector: (to Oil Pump Motor Controller)

      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. A000WKWE04
      *1 Rear view of wire harness connector: (to Hybrid Vehicle Control ECU)
      *2 Front view of wire harness connector: (to Oil Pump Motor Controller)

      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. A000ZEWE02
      *1 Component with harness connected: (Hybrid Vehicle Control ECU)

      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

    OK

    REPLACE OIL PUMP MOTOR CONTROLLER Click here

    NG

    REPAIR OR REPLACE OIL PUMP MOTOR CONTROLLER

  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.

      A000W5ME02
      *1 Engine Room No. 1 Junction Block
      *2 for LHD:
      *3 for RHD:
      *4 OIL PMP
      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. A000WWVE01
      *1 Engine Room No. 5 Relay Block
      *2 OIL PMP Relay

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

    3. A000X13E01
      *1 Engine Room No. 5 Relay Block
      *2 OIL PMP Relay
      *3 Front view of wire harness connector: (to Oil Pump Motor Controller)

      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. A000WPYE01
      *1 OIL PMP Relay

      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. A000TNGE02
      *1 Engine Room No. 5 Relay Block
      *2 OIL PMP Relay

      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. A000TNGE02
      *1 Engine Room No. 5 Relay Block
      *2 OIL PMP Relay

      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

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

    NG

  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. A000VLEE01
      *1 Rear view of wire harness connector: (to Hybrid Vehicle Control ECU)
      *2 Engine Room No. 5 Relay Block
      *3 OIL PMP Relay

      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

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  14. CHECK FOR INTERMITTENT PROBLEMS


    1. Check for intermittent problems Click here.


    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

    NG

    REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA