HYBRID CONTROL SYSTEM, Diagnostic DTC:P2797-881

DTC Code DTC Name
P2797-881 Auxiliary Transmission Fluid Pump Control Performance

DESCRIPTION

For a description of the oil pump motor, Click here.

DTC No. INF Code DTC Detection Condition Trouble Area
P2797 881 Difference between the oil pump rotation speed requested by the hybrid vehicle control ECU and the actual rotation speed exceeds a specified value constantly for a specified time.

  • Hybrid vehicle transmission assembly

  • Oil with motor pump assembly

  • Wire harness or connector

  • Hybrid vehicle control ECU

  • Fusible link block assembly

  • Relay (OIL PMP)

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK DTC OUTPUT (HV)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.

    4. Check if DTCs are output.

      Result
      Result Proceed to
      P2797-881 only is output. A
      Any of the following DTCs are also output. B
      DTC No. Relevant Diagnosis
      P0C29-865 Auxiliary Transmission Fluid Pump Driver Circuit Performance
      P0C2C-888, 889 Auxiliary Transmission Fluid Pump Control Module Feedback Signal Range / Performance
      P0C2D-858 Auxiliary Transmission Fluid Pump Control Module Feedback Signal Low
      P0C2E-859 Auxiliary Transmission Fluid Pump Control Module Feedback Signal High
      P3175-862 Transmission Oil Pump Motor Coil Temperature Sensor Circuit
      P3176-863 Transmission Oil Pump Motor Coil Temperature Sensor Circuit Low
      P3177-864 Transmission Oil Pump Motor Coil Temperature Sensor Circuit High

    B

    GO TO DTC CHART 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 HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - OIL PUMP MOTOR CONTROLLER)


    1. A01GX7LE25

      Turn the power switch off.

    2. 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
      A76-32 (OPM1) - Body ground Power switch on (IG) Below 1 V
      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
      A76-32 (OPM1) - A80-6 (SI) Power switch off Below 1 Ω
      A76-33 (OPST) - A80-7 (OPST) Power switch off Below 1 Ω
      Standard resistance (Check for short)
      Tester Connection Switch Condition Specified Condition
      A76-32 (OPM1) - Body ground and other terminals Power switch off 10 kΩ or higher
      A76-33 (OPST) - Body ground and other terminals Power switch off 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. 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

  6. CHECK RELAY (OIL PMP)


    1. A01GZJNE01

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

    2. 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

  7. CHECK OIL WITH MOTOR PUMP ASSEMBLY


    1. A01GZHDE04

      Disconnect the connectors 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
      W - Body ground Power switch on (IG) Below 1 V
      U - Body ground Power switch on (IG) Below 1 V
      V - Body ground Power switch on (IG) Below 1 V
      OHW - Body ground Power switch on (IG) Below 1 V
      OHV - Body ground Power switch on (IG) Below 1 V
      OHU - Body ground Power switch on (IG) Below 1 V
      OIGH - Body ground Power switch on (IG) Below 1 V
      OHG - Body ground Power switch on (IG) Below 1 V

      Note

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

    4. Turn the power switch off.

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

      Standard resistance (Check for open)
      Tester Connection Switch Condition Specified Condition
      W - U Power switch off Below 1 Ω
      W - V Power switch off Below 1 Ω
      Standard resistance (Check for short)
      Tester Connection Switch Condition Specified Condition
      W - Body ground Power switch off 10 kΩ or higher
      U - Body ground Power switch off 10 kΩ or higher
      V - Body ground Power switch off 10 kΩ or higher
      OHW - Body ground Power switch off 10 kΩ or higher
      OHV - Body ground Power switch off 10 kΩ or higher
      OHU - Body ground Power switch off 10 kΩ or higher
      OIGH - Body ground Power switch off 10 kΩ or higher
      OHG - Body ground Power switch off 10 kΩ or higher

    NG

    REPLACE OIL WITH MOTOR PUMP ASSEMBLY Click here

    OK

  8. CHECK OIL PUMP MOTOR CONTROLLER (VOLTAGE)


    1. A01GZJNE01

      Install the OIL PMP relay to the engine room No. 5 relay block.

    2. A01GYQIE07

      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
    5. A01GZ0TE02

      Turn the power switch off.

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

    7. 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
    8. A01GZ9VE02

      Disconnect connector A76 from the hybrid vehicle control ECU.

    9. 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

  9. CLEAR DTC


    1. Turn the power switch on (IG).

    2. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.

    3. Read and record the DTCs and freeze frame data.

    4. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.

    5. Clear DTCs and freeze frame data.


    NEXT

  10. SIMULATION TEST


    1. Select the following menu items: Powertrain / Hybrid Control / Active Test / Activate the Oil Pump (500rpm), Activate the Oil Pump (1000rpm).

    2. Select the following menu items: All Data / OPM Revolution.

    3. Perform the "Activate the Oil Pump (500rpm)" and "Activate the Oil Pump (1000rpm)" Active Tests.

      Note

      Make sure that the auxiliary battery is not discharged.

      Tech Tips

      Do not use the "OPM Target Revolution" as a reference during the Active Test.

      OK
      For both the "Activate the Oil Pump (500rpm)" and "Activate the Oil Pump (1000rpm)" Active Tests, the value of "OPM Revolution" is almost the same as the corresponding Active Test speed.
      Active Test Data List
      Activate the Oil Pump OPM Revolution
      500 500
      1000 1000

    NG

    REPLACE OIL WITH MOTOR PUMP ASSEMBLY Click here

    OK

  11. CHECK FOR INTERMITTENT PROBLEMS


    1. Check for intermittent problems Click here.


    NG

    REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

    OK

  12. CHECK FOR FLUID LEAKS


    1. Check for fluid leaks from the hybrid vehicle transmission assembly.

      OK
      There are no fluid leaks.

    NG

    REPAIR OR REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY Click here

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here