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Home >> Toyota >> 2022 >> Avalon XLE >> Repair and Diagnosis >> External Pages >> Different car >> Section 14 (Hybrid Control System (Nickel Metal Hydride) - Diagnostic Codes (P0AE1-P1C87)) >> HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY) >> DTC P1C86-79: Transmission (Input) Mechanical Linkage Failure [04/2018 - 08/2020] >> Procedure

DTC P1C86-79: Transmission (Input) Mechanical Linkage Failure [04/2018 - 08/2020]: Procedure

WARNING: This page is about a different car, the 2020 Toyota Avalon and 2019 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK DTC OUTPUT (HYBRID CONTROL) 
    1. Connect the Techstream 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. Check for DTCs.

      Result

      Result Proceed to
      P1C86-79 only is output, or DTCs except the ones in the table below are also output A
      Any of the following DTCs including pending DTCs are also output B
      Malfunction Content Relevant DTC
      Sensor and actuator circuit malfunction P1C87-79 Generator Mechanical Linkage Failure
      P1C88-79 Planetary Gear Mechanical Linkage Failure

      HINT: 

      P1C86-79 may be output as a result of the malfunction indicated by the DTCs above.

    5. Turn the power switch off.

    Result: 

    B 

    GO TO DTC CHART (HYBRID CONTROL SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [04/2018 - 08/2020] 

    Result: 

    A 

    See step  2

  2. CHECK CRANKSHAFT PULLEY REVOLUTION (P POSITION) 

    See step  1

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    See step  7

    Result: 

    OK 

    See step  3

  3. CLEAR DTC 

    See step  2

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  4

  4. CHECK ENGINE RACING 

    See step  3

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY. Refer to  REMOVAL [04/2018 - 08/2021] 

    Result: 

    OK 

    See step  5

  5. CHECK CREEP MOVEMENT 

    See step  4

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY. Refer to  REMOVAL [04/2018 - 08/2021] 

    Result: 

    OK 

    See step  6

  6. INSPECT ENGINE SPEED 

    See step  5

    Result

    Result Proceed to
    The absolute value of the difference is less than 500 rpm. A
    The absolute value of the difference is 500 rpm or more continuously for 1 second. B

    Result: 

    A 

    REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY. Refer to  REMOVAL [04/2018 - 08/2021] 

    Result: 

    B 

    REPLACE TRANSMISSION INPUT DAMPER ASSEMBLY. Refer to  REMOVAL [04/2018 - 08/2021] 

  7. CHECK CRANKSHAFT PULLEY REVOLUTION (N POSITION) 

    See step  6

    Result

    Proceed to
    OK
    NG

    Result: 

    OK 

    REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY. Refer to  REMOVAL [04/2018 - 08/2021] 

    Result: 

    NG 

    REPAIR OR REPLACE ENGINE