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Home >> Lexus >> 2009 >> GS 450h >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Hybrid Vehicle Control (Diagnostic Codes (P0AE6-225 - U0424-537)) >> Hybrid Control System >> DTC P2797-865: Auxiliary Transmission Fluid Pump Control Performance >> Procedure

DTC P2797-865: Auxiliary Transmission Fluid Pump Control Performance: Procedure

  1. CHECK DTC OUTPUT (HV) 
    1. Connect the Techstream 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

      DTC No. Relevant Diagnosis
      P2797-895 OPM driver circuit

    YES → GO TO DTC CHART 

    NO: Go to next step 

  2. CHECK FREEZE FRAME DATA 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
    4. Read output DTCs.
    5. Read the freeze frame data (auxiliary battery voltage) of P2797-865.

      Result

      +B is 10 V or more.

    NG → CHECK AUXILIARY BATTERY 

    OK: Go to next step 

  3. CLEAR DTC 
    1. Turn the power switch on (IG).
    2. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
    3. Read output DTCs.
    4. Read the freeze frame data.
    5. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
    6. Clear the DTCs.

    NEXT: Go to next step 

  4. CHECK DTC OUTPUT (HV) 
    1. Check if the DTC is output several seconds (approximately 3 seconds) after the power switch is turned on (IG) or the ST-on state occurs.

      Result

      Result Trouble Area Proceed to
      The DTC is output several seconds (approximately 3 seconds) after the power switch is turned on (IG). SIG signal circuit A
      The DTC is output several seconds (approximately 3 seconds) after the ST-on state occurs. Motor circuit B
      DTC is not detected - C

    C → CHECK FOR INTERMITTENT PROBLEMS 

    B → See step   11 

    A: Go to next step 

  5. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - OIL PUMP MOTOR CONTROLLER) 
    1. Turn the power switch off.
      Fig 1: Identifying A54 Hybrid Vehicle Control ECU And A55 Oil Pump Motor Controller Connectors
      GTY147193Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect connector A54 from the hybrid vehicle control ECU.
    3. Disconnect connector A55 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 Specified Condition
      OPM1 (A54-3) or SI (A55-6) - Body ground Below 1 V
      NOTE:

      Turning the power switch on (IG) with the hybrid vehicle control ECU connector 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

      Tester Connection Specified Condition
      OPM1 (A54-3) - SI (A55-6) Below 1 Ω
    8. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Specified Condition
      OPM1 (A54-3) - Body ground 10 kΩ or more

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  6. CHECK HYBRID VEHICLE CONTROL ECU 
    1. Connect the connector to the hybrid vehicle control ECU.
      Fig 2: Identifying A55 Oil Pump Motor Controller Connector
      GTY147195Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Specified Condition
      SI (A55-6) - Body ground 10 kΩ or more

    NG → See step   16 

    OK: Go to next step 

  7. CHECK OIL PUMP MOTOR CONTROLLER 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 3: Identifying A55 Oil Pump Motor Controller Connector
      GTY144061Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance

      Tester Connection Specified Condition
      SI (A55-6) - Body ground 5.4 to 6.0 kΩ

    NG → See step   13 

    OK: Go to next step 

  8. CHECK HYBRID VEHICLE CONTROL ECU 
    1. Turn the power switch on (IG).
    2. Measure the voltage according to the value(s) in the table below.
      Fig 4: Identifying A55 Oil Pump Motor Controller Connector
      GTY147195Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage

      Tester Connection Specified Condition
      SI (A55-6) - Body ground Below 1 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.

      HINT: 

      Perform this inspection with the hybrid vehicle control ECU connectors connected.

    NG → See step   16 

    OK: Go to next step 

  9. CHECK OIL PUMP MOTOR CONTROLLER 
    1. Turn the power switch off.
    2. Disconnect connector A54 from the hybrid vehicle control ECU.
    3. Connect the connector to the oil pump motor controller.
    4. Remove the OIL PMP relay from the engine room R/B No. 1.
    5. Apply battery voltage (12 V) directly to the 3 terminals of the relay block holder for the OIL PMP relay.
      Fig 5: Identifying OIL PMP Relay
      GTY124124Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Measure the voltage according to the value(s) in the table below.
      Fig 6: Identifying A54 Hybrid Vehicle Control ECU Connector
      GTY147196Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage

      Tester Connection Specified Condition
      OPM1 (A54-3) - Body ground 10 to 14 V

    NG → See step   17 

    OK: Go to next step 

  10. CHECK IF PART IS CORRECTLY GROUNDED 
    1. Turn the power switch off.
    2. Measure the resistance between the oil pump motor controller body and body ground.

      Standard resistance

      There is continuity.

    NG → See step   15 

    OK → See step   13 

  11. CHECK OIL WITH MOTOR PUMP ASSEMBLY 
    1. Disconnect connectors from the oil pump motor controller.
      Fig 7: Checking Hybrid Vehicle Transmission Assembly (Oil Pump Motor Controller)
      GTY145552Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Turn the power switch on (IG).
    3. Measure the voltage according to the value(s) in the table below.

      Standard voltage

      Tester Connection Specified Condition
      W - Body ground Below 1 V
      U - Body ground Below 1 V
      V - Body ground Below 1 V
      OHW - Body ground Below 1 V
      OHV - Body ground Below 1 V
      OHU - Body ground Below 1 V
      OIGH - Body ground Below 1 V
      OHG - Body ground Below 1 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. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Specified Condition
      W - U Below 1 Ω
      W - V Below 1 Ω
    6. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Specified Condition
      W - Body ground 10 kΩ or more
      U - Body ground 10 kΩ or more
      V - Body ground 10 kΩ or more
      OHW - Body ground 10 kΩ or more
      OHV - Body ground 10 kΩ or more
      OHU - Body ground 10 kΩ or more
      OIGH - Body ground 10 kΩ or more
      OHG - Body ground 10 kΩ or more

    NG → See step   14 

    OK: Go to next step 

  12. CHECK IF PART IS CORRECTLY GROUNDED 
    1. Measure the resistance between the oil pump motor controller body and body ground.

      Standard resistance

      There is continuity.

    NG → See step   15 

    OK → See step   17 

  13. REPLACE OIL PUMP MOTOR CONTROLLER. Refer to  COMPONENTS 
  14. REPLACE OIL WITH MOTOR PUMP ASSEMBLY. Refer to  COMPONENTS 
  15. REPAIR OR REPLACE OIL PUMP MOTOR CONTROLLER. Refer to  COMPONENTS 
  16. REPLACE HYBRID VEHICLE CONTROL ECU. Refer to  COMPONENTS 
  17. REPLACE OIL PUMP MOTOR CONTROLLER. Refer to  COMPONENTS 
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