HYBRID CONTROL SYSTEM, Diagnostic DTC:P0C2B31

DTC Code DTC Name
P0C2B31 Auxiliary Transmission Fluid Pump Control Module Feedback Signal No Signal

DTC SUMMARY

This DTC indicates that the signal from the oil pump motor controller to the hybrid vehicle ECU assembly has been interrupted. The cause of this malfunction may be one of the following:


DESCRIPTION

Refer to the description for DTC P0C2996.

Click here

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P0C2B31 Auxiliary Transmission Fluid Pump Control Module Feedback Signal No Signal

Signal from oil pump motor controller interrupted for 1 second or more (The TPST signal from the oil pump motor controller is open or short to GND or short to +B in the TPST (status signal line) circuit)

(1-trip detection logic)

  • Oil pump motor controller

  • Wire harness or connector

  • Hybrid vehicle control ECU assembly

  • OIL PMP relay

  • Fusible link (OIL PMP)

 Comes on

Master Warning Light:

Comes on
Related Data List
DTC No. Data List
P0C2B31

  • Transmission Fluid Pump Motor Revolution

  • Request Transmission Fluid Pump Motor Revolution

  • Transmission Fluid Pump Motor Control Status

  • Transmission Fluid Pump Motor Drive Request
Related Active Test
DTC No. Data List
P0C2B31 Control the Transmission Oil Pump

CONFIRMATION DRIVING PATTERN

Tech Tips

After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

Click here


  1. Connect the GTS to the DLC3.

  2. Turn the power switch on (IG) and turn the GTS on.

  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  4. Turn the power switch off and wait for 2 minutes or more.

  5. Turn the power switch on (READY), and wait for 2 minutes or more.

  6. Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.

  7. Check the DTC judgment result.

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE, perform driving pattern again.

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0C2996.

Click here

PROCEDURE


  1. CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY (CHECK WAVEFORM)


    1. B004UBTC09
      *a

      Component with harness connected

      (Hybrid Vehicle Control ECU Assembly)
      *b Normal waveform example:

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

      Tester Connection Condition Equipment Setting
      A76-34 (TPST) - G92-6 (E1) Power switch on (IG) 5 V/DIV., 5 ms./DIV.
      Result
      Result Proceed to
      Normal A
      Waveform is flat, and is stuck on the GND side. B
      Waveform is flat, and is stuck on the +B side. C
      There is an interruption or distortion in the waveform. D

    2. Turn the power switch off.


    A

    CHECK FOR INTERMITTENT PROBLEMS Click here

    C

    CHECK CONNECTOR CONNECTION CONDITION (OIL PUMP MOTOR CONTROLLER CONNECTOR) Click here

    D

    CHECK FREEZE FRAME DATA Click here

    B

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

    Result
    Proceed to
    OK
    NG

    Note

    Before disconnecting the connector, confirm that it is properly connected by checking that the claws of the lock levers are engaged and that the connector cannot be pulled off.


    1. B004VFR

      Check the connection condition of the oil pump motor controller connector.

      Click here

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

      Tech Tips

      When connecting the connector, connect it with the lock levers raised. Rotate each lock lever downward and make sure that the connector is securely connected. When a lock lever is fully lowered, a click will be heard as its claw engages. After the click is heard, pull up on the connector to confirm that it is securely connected.

      Result
      Proceed to
      OK
      NG

    NG

    CONNECT SECURELY

    OK

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

    Result
    Proceed to
    OK
    NG

    1. B004W01C01
      *A for LHD
      *B for RHD

      Check the connector connections and contact pressure of the relevant terminals for the hybrid vehicle control ECU assembly connectors.

      Click here

      OK
      The connectors are connected securely and there are no contact pressure problems.
      Result
      Proceed to
      OK
      NG

    NG

    CONNECT SECURELY

    OK

  4. CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY (CHECK VOLTAGE)


    1. B004Y7BC28
      *a

      Front view of wire harness connector

      (to Oil Pump Motor Controller)

      Disconnect the A80 oil pump motor controller connector.

    2. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A80-7 (OPST) - 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.

    4. Turn the power switch off.

    5. Reconnect the A80 oil pump motor controller connector.

      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - OIL PUMP MOTOR CONTROLLER) Click here

    OK

  5. INSPECT OIL PUMP MOTOR CONTROLLER


    1. B004VYMC06
      *1 Oil Pump Motor Controller

      Disconnect the A80 oil pump motor controller connector.

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

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

    3. Reconnect the A80 oil pump motor controller connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here

    NG

    REPLACE OIL PUMP MOTOR CONTROLLER for 2WD: REPLACE OIL PUMP MOTOR CONTROLLER Click here
    REPLACE OIL PUMP MOTOR CONTROLLER for AWD: REPLACE OIL PUMP MOTOR CONTROLLER Click here

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


    1. B004WXMC30
      *a

      Rear view of wire harness connector

      (to Hybrid Vehicle Control ECU Assembly)
      *b

      Front view of wire harness connector

      (to Oil Pump Motor Controller)

      Disconnect the A76 hybrid vehicle control ECU assembly connector.

    2. Disconnect the A80 oil pump motor controller connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A76-34 (TPST) - A80-7 (OPST) Power switch off Below 1 Ω
      A76-34 (TPST) or A80-7 (OPST) - Body ground and other terminals Power switch off 10 kΩ or higher

    4. Reconnect the A80 oil pump motor controller connector.

    5. Reconnect the A76 hybrid vehicle control ECU assembly connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

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

    Result
    Proceed to
    OK
    NG

    Note

    Before disconnecting the connector, confirm that it is properly connected by checking that the claws of the lock levers are engaged and that the connector cannot be pulled off.


    1. B004VFR

      Check the connection condition of the oil pump motor controller connector.

      Click here

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

      Tech Tips

      When connecting the connector, connect it with the lock levers raised. Rotate each lock lever downward and make sure that the connector is securely connected. When a lock lever is fully lowered, a click will be heard as its claw engages. After the click is heard, pull up on the connector to confirm that it is securely connected.

      Result
      Proceed to
      OK
      NG

    NG

    CONNECT SECURELY

    OK

  8. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU ASSEMBLY CONNECTOR)

    Result
    Proceed to
    OK
    NG

    1. B004W01C01
      *A for LHD
      *B for RHD

      Check the connector connections and contact pressure of the relevant terminals for the hybrid vehicle control ECU assembly connectors.

      Click here

      OK
      The connectors are connected securely and there are no contact pressure problems.
      Result
      Proceed to
      OK
      NG

    NG

    CONNECT SECURELY

    OK

  9. CHECK OIL PUMP MOTOR CONTROLLER


    1. B004Y7BC29
      *a

      Front view of wire harness connector

      (to Oil Pump Motor Controller)

      Disconnect the A80 oil pump motor controller connector.

    2. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection 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.

    4. Turn the power switch off.

    5. Reconnect the A80 oil pump motor controller connector.

      Result
      Proceed to
      OK
      NG

    NG

    CHECK ENGINE ROOM FUSIBLE LINK (OIL PMP) Click here

    OK

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


    1. B004WXMC30
      *a

      Rear view of wire harness connector

      (to Hybrid Vehicle Control ECU Assembly)
      *b

      Front view of wire harness connector

      (to Oil Pump Motor Controller)

      Disconnect the A76 hybrid vehicle control ECU assembly connector.

    2. Disconnect the A80 oil pump motor controller connector.

    3. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A76-34 (TPST) - Body ground Power switch on (IG) Below 1 V

      Note

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

    5. Turn the power switch off.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A76-34 (TPST) - A80-7 (OPST) Power switch off Below 1 Ω
      A76-34 (TPST) or A80-7 (OPST) - Other terminals Power switch off 10 kΩ or higher

    7. Reconnect the A80 oil pump motor controller connector.

    8. Reconnect the A76 hybrid vehicle control ECU assembly connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  11. CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY


    1. B004U4TC30
      *a

      Component with harness connected

      (Hybrid Vehicle Control ECU Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A76-34 (TPST) - G92-4 (+B1) Power switch off 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here

    OK

  12. CHECK IF PART IS CORRECTLY GROUNDED


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Oil pump motor controller - Body ground Power switch off Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE OIL PUMP MOTOR CONTROLLER for 2WD: REPLACE OIL PUMP MOTOR CONTROLLER Click here
    REPLACE OIL PUMP MOTOR CONTROLLER for AWD: REPLACE OIL PUMP MOTOR CONTROLLER Click here

    NG

    REPAIR OR REPLACE OIL PUMP MOTOR CONTROLLER BRACKET

  13. CHECK ENGINE ROOM FUSIBLE LINK (OIL PMP)


    1. B004R9MC02
      *1 No. 1 Engine Room Relay Block
      *2 Fusible Link (OIL PMP)

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

      OK
      There is no open circuit in the fusible link (OIL PMP).
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE ENGINE ROOM FUSIBLE LINK (OIL PMP)

    OK

  14. CHECK HARNESS AND CONNECTOR


    1. B004V3NC02
      *1 No. 1 Engine Room Relay Block
      *2 OIL PMP Relay

      Remove the OIL PMP relay from the No. 1 engine room relay block.

    2. B004UXVC06
      *1 No. 1 Engine Room Relay Block
      *2 OIL PMP Relay
      *a

      Front view of wire harness connector

      (to Oil Pump Motor Controller)

      Disconnect the A80 oil pump motor controller connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      5 - A80-5 (+B) Power switch off Below 1 Ω
      2 - Body ground Power switch off Below 1 Ω
      5 - Body ground Power switch off 10 kΩ or higher

    4. Install the OIL PMP relay.

    5. Reconnect the A80 oil pump motor controller connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  15. INSPECT RELAY (OIL PMP)


    1. B004V3NC02
      *1 No. 1 Engine Room Relay Block
      *2 OIL PMP Relay

      Remove the OIL PMP relay from the No. 1 engine room relay block.

    2. B004RGNC04
      *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 not applied between terminals 1 and 2 10 kΩ or higher
      Auxiliary battery voltage applied between terminals 1 and 2 Below 1 Ω

    3. Install the OIL PMP relay.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE RELAY (OIL PMP)

    OK

  16. CHECK HARNESS AND CONNECTOR (AUXILIARY BATTEERY - NO. 1 ENGINE ROOM RELAY BLOCK)


    1. B004RYYC02
      *1 No. 1 Engine Room Relay Block
      *2 OIL PMP Relay

      Remove the OIL PMP relay from the No. 1 engine room relay block.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      3 - Body ground Power switch off 11 to 14 V

    3. Install the OIL PMP relay.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  17. CHECK HARNESS AND CONNECTOR


    1. B004RYYC02
      *1 No. 1 Engine Room Relay Block
      *2 OIL PMP Relay

      Remove the OIL PMP relay from the No. 1 engine room relay block.

    2. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      1 - Body ground Power switch on (IG) 11 to 14 V

    4. Power switch off

    5. Install the OIL PMP relay.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here

    NG

  18. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - NO. 1 ENGINE ROOM RELAY BLOCK)


    1. Remove the OIL PMP relay from the No. 1 engine room relay block.

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

      B004ULQC07
      *1 No. 1 Engine Room Relay Block *2 OIL PMP Relay
      *a

      Rear view of wire harness connector

      (to Hybrid Vehicle Control ECU Assembly)

      		 - -

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - A76-1 (TPM2) Power switch off Below 1 Ω
      1 or A76-1 (TPM2) - Body ground Power switch off 10 kΩ or higher

    4. Reconnect the A76 hybrid vehicle control ECU assembly connector.

    5. Install the OIL PMP relay.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  19. CHECK FREEZE FRAME DATA


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.


      Powertrain > Hybrid Control > Trouble Codes

    4. Read the freeze frame data (auxiliary battery voltage) of DTC P0C2B31.

      OK
      Auxiliary battery voltage is 10 V or higher.

    5. Turn the power switch off.

      Result
      Proceed to
      OK
      NG

    NG

    CHECK AUXILIARY BATTERY Click here

    OK

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

    Result
    Proceed to
    OK
    NG

    Note

    Before disconnecting the connector, confirm that it is properly connected by checking that the claws of the lock levers are engaged and that the connector cannot be pulled off.


    1. B004VFR

      Check the connection condition of the oil pump motor controller connector.

      Click here

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

      Tech Tips

      When connecting the connector, connect it with the lock levers raised. Rotate each lock lever downward and make sure that the connector is securely connected. When a lock lever is fully lowered, a click will be heard as its claw engages. After the click is heard, pull up on the connector to confirm that it is securely connected.

      Result
      Proceed to
      OK
      NG

    NG

    CONNECT SECURELY

    OK

  21. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU ASSEMBLY CONNECTOR)

    Result
    Proceed to
    OK
    NG

    1. B004W01C01
      *A for LHD
      *B for RHD

      Check the connector connections and contact pressure of the relevant terminals for the hybrid vehicle control ECU assembly connectors.

      Click here

      OK
      The connectors are connected securely and there are no contact pressure problems.
      Result
      Proceed to
      OK
      NG

    NG

    CONNECT SECURELY

    OK

  22. CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY


    1. Turn the power switch on (IG).

    2. B004U4TC31
      *a

      Component with harness connected

      (Hybrid Vehicle Control ECU Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      G92-4 (+B1) - Body ground Power switch on (IG) 11 to 14 V

    3. Turn the power switch off.

      Result
      Proceed to
      OK
      NG

    NG

    CHECK ECU POWER SOURCE CIRCUIT Click here

    OK

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


    1. B004WXMC30
      *a

      Rear view of wire harness connector

      (to Hybrid Vehicle Control ECU Assembly)
      *b

      Front view of wire harness connector

      (to Oil Pump Motor Controller)

      Disconnect the A76 hybrid vehicle control ECU assembly connector.

    2. Disconnect the A80 oil pump motor controller connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A76-34 (TPST) - A80-7 (OPST) IG OFF Below 1 Ω
      A76-34 (TPST) or A80-7 (OPST) - Body ground and other terminals IG OFF 10 kΩ or higher

    4. Reconnect the A80 oil pump motor controller connector.

    5. Reconnect the A76 hybrid vehicle control ECU assembly connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  24. CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY (CHECK VOLTAGE)


    1. B004Y7BC28
      *a

      Front view of wire harness connector

      (to Oil Pump Motor Controller)

      Disconnect the A80 oil pump motor controller connector.

    2. Turn the power switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A80-7 (OPST) - 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.

    4. Turn the power switch off.

    5. Reconnect the A80 oil pump motor controller connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE OIL PUMP MOTOR CONTROLLER for 2WD: REPLACE OIL PUMP MOTOR CONTROLLER Click here
    REPLACE OIL PUMP MOTOR CONTROLLER for AWD: REPLACE OIL PUMP MOTOR CONTROLLER Click here

    NG

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here