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Home >> Toyota >> 2019 >> Highlander LE Plus, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 111 (SFI System (2GR-FXS) - Diagnostic Codes - (Hybrid) (3 Of 4)) >> SFI System >> DTC P0088: Fuel Rail / System Pressure - Too High [11/2016 - ] >> Procedure

DTC P0088: Fuel Rail / System Pressure - Too High [11/2016 - ]: Procedure

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  1. CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0088) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG) and turn the Techstream on.
    3. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
    4. Read the DTCs.

      Powertrain > Engine and ECT > Trouble Codes 

      Result

      Result Proceed to
      DTC P0088 is output A
      DTC P0088 and other DTCs are output B

      HINT: 

      If any DTCs other than P0088 are output, troubleshoot those DTCs first.

    Result: 

    B 

    GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [11/2016 - 10/2017]  or  DIAGNOSTIC TROUBLE CODE CHART [10/2017 - ] 

    Result: 

    A 

    See step  2

  2. CHECK FUEL PRESSURE SENSOR (FOR HIGH PRESSURE SIDE) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG) and turn the Techstream on.
    3. Put the engine in inspection mode (maintenance mode).

      Powertrain > Hybrid Control > Utility 

      Tester Display
      Inspection Mode
    4. Start the engine.
    5. Enter the following menus: Powertrain / Engine and ECT / Data List / Fuel Press.

      Powertrain > Engine and ECT > Data List 

      Tester Display
      Fuel Press
    6. According to the display on the Techstream, read the Data List while racing the engine.

      OK

      Fuel pressure fluctuates.

      Result

      Proceed to
      OK
      NG

      HINT: 

      Perform "Inspection After Repair" after replacing the fuel pressure sensor (for high pressure side).

      Refer to INITIALIZATION [11/2016 - ]

    Result: 

    NG 

    REPLACE FUEL DELIVERY PIPE WITH SENSOR ASSEMBLY LH (FUEL PRESSURE SENSOR (FOR HIGH PRESSURE SIDE)). Refer to  REMOVAL [11/2016 - ] 

    Result: 

    OK 

    See step  3

  3. REPLACE FUEL PUMP ASSEMBLY (FOR HIGH PRESSURE SIDE) 
    1. Replace the fuel pump assembly (for high pressure side).

      Refer to REMOVAL [11/2016 - ]

      HINT: 

      Perform "Inspection After Repair" after replacing the fuel pump assembly (for high pressure side).

      Refer to INITIALIZATION [11/2016 - ]

    NEXT 

    See step  4

  4. CHECK IF DTC OUTPUT RECURS (SEE IF DTC P0088 IS OUTPUT AGAIN) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Clear the DTCs.

      Powertrain > Engine and ECT > Clear DTCs 

    5. Turn the power switch off and wait at for least 30 seconds.
    6. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.
    7. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
    8. Read the DTCs.

      Powertrain > Engine and ECT > Trouble Codes 

      Result

      Result Proceed to
      DTC P0088 is output A
      DTCs are not output B

    Result: 

    A 

    REPLACE ECM. Refer to  REMOVAL [11/2016 - ] 

    Result: 

    B 

    END 

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