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Home >> Lexus >> 2010 >> LS 600hL >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Hybrid Vehicle Control (Diagnostic Codes (P2120-152 - U0424-537) & Circuit Tests) >> Hybrid Control System >> DTC P2797-881: Auxiliary Transmission Fluid Pump Control Performance >> Procedure

DTC P2797-881: 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

      Result Proceed to
      P2797-881 only is output. A
      Any of the following DTCs are also output. B
      DTC No. Relevant Diagnosis
      P2797-865, 888, 889, 890, 895 Auxiliary Transmission Fluid Pump Control Performance
      P2798-858 Auxiliary Transmission Fluid Pump Control Circuit Low
      P2799-859 Auxiliary Transmission Fluid Pump Control Circuit High
      P3154-896 Transmission Oil Pump Motor Driver Temperature 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 → See step   14 

    A: Go to next step 

  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 cannot be pulled out.

    1. Check the connections of the oil pump motor controller connectors.
      Fig 1: Locating Oil Pump Motor Controller Connectors
      GTY147641Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK

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

      HINT: 

      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: Go to next step 

  3. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR) 
    1. 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: Go to next step 

  4. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - OIL PUMP MOTOR CONTROLLER) 
    1. Turn the power switch off.
      Fig 2: Identifying A74 And A78 Terminal Connectors
      GTY262630Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect connector A74 from the hybrid vehicle control ECU.
    3. Disconnect connector A78 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
      A74-32 (OPM1) - Body ground Power switch on (IG) Below 1 V
      A74-33 (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
      A74-32 (OPM1) - A78-6 (SI) Power switch off Below 1 Ω
      A74-33 (OPST) - A78-7 (OPST) Power switch off Below 1 Ω

      Standard resistance (Check for short)

      Tester Connection Switch Condition Specified Condition
      A74-32 (OPM1) - Body ground and other terminals Power switch off 10 kΩ or higher
      A74-33 (OPST) - Body ground and other terminals Power switch off 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  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.
      Fig 3: Identifying Fusible Link (Oil Pump)
      GTY148116Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK

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

    NG → REPLACE FUSIBLE LINK BLOCK ASSEMBLY 

    OK: Go to next step 

  6. CHECK RELAY (OIL PMP) 
    1. Remove the OIL PMP relay from the engine room No. 5 relay block.
      Fig 4: Identifying OIL PMP Relay
      GTY147642Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.
      Fig 5: Inspecting Oil Pump Relay
      GTY135566Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      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 → See step   16 

    OK: Go to next step 

  7. CHECK OIL WITH MOTOR PUMP ASSEMBLY. Refer to  PROCEDURE - Step 9 

    NG → See step   15 

    OK: Go to next step 

  8. CHECK OIL PUMP MOTOR CONTROLLER (VOLTAGE) 
    1. Install the OIL PMP relay to the engine room No. 5 relay block.
      Fig 6: Identifying OIL PMP Relay
      GTY147642Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect connector A78 from the oil pump motor controller.
      Fig 7: Identifying A78 Connector Terminals
      GTY147192Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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
      A78-5 (+B) - Body ground Power switch on (IG) 11 to 14 V
    5. Turn the power switch off.
      Fig 8: Identifying OIL PMP Relay And A78 Terminal Connector
      GTY139331Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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 - A78-5 (+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. Disconnect connector A74 from the hybrid vehicle control ECU.
      Fig 9: Identifying A74 Terminal Connector And OIL PMP Relay
      GTY128198Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    9. Measure the resistance according to the value(s) in the table below.

      Standard resistance (Check for open)

      Tester Connection Switch Condition Specified Condition
      A74-24 (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
      A74-24 (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: Go to next step 

  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: Go to next step 

  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 Target Revolution, 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.

      OK

      "OPM Target Revolution" and "OPM Revolution" values are almost equal.

      Active Test Data List
      Oil Pump OPM Target Revolution OPM Revolution
      500 500 500
      1000 1000 1000

    NG → See step   15 

    OK: Go to next step 

  11. CHECK FOR INTERMITTENT PROBLEMS 
    1. Check for intermittent problems. Refer to CHECK FOR INTERMITTENT PROBLEMS .

    NG → REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA 

    OK: Go to next step 

  12. CHECK FOR FLUID LEAKS 
    1. Check for fluid leaks from the hybrid vehicle transmission assembly.

      OK

      There are no fluid leaks.

    NG → See step   17 

    OK → See step   13 

  13. REPLACE HYBRID VEHICLE CONTROL ECU. Refer to  COMPONENTS 
  14. GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART 
  15. REPLACE OIL WITH MOTOR PUMP ASSEMBLY. Refer to  COMPONENTS 
  16. REPLACE RELAY (OIL PMP). Refer to  COMPONENTS 
  17. REPAIR OR REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY. Refer to  COMPONENTS 
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