DSD Information System
Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 115 (Hybrid Control System (AWD) - Diagnostic Codes (3 Of 6)) >> HYBRID CONTROL SYSTEM (for AWD) >> DTC P0AA6-49: Hybrid/EV Battery Voltage System Isolation Internal Electronic Failure; DTC P1C7C-49: Hybrid/EV Battery Voltage System Isolation (A/C Area) Internal Electronic Failure; DTC P1C7D-49: Hybrid/EV Battery Voltage System Isolation (Hybrid/EV Battery Area) Internal Electronic Failure; DTC P1C7E-49: Hybrid/EV Battery Voltage System Isolation (Transaxle Area) Internal Electronic Failure; DTC P1C7F-49: Hybrid/EV Battery Voltage System Isolation (Direct Current Area) Internal Electronic Failure; DTC P1C80-49: Hybrid/EV Battery Voltage System Isolation (Rear Motor Area) Internal Electronic Failure [12/2019 - 11/2023] >> Confirmation Driving Pattern

Confirmation Driving Pattern

WARNING: This page is about a different variant/trim than selected.
  1. CONFIRMATION AFTER REPLACING PARTS 

    HINT: 

    After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure. (Do not turn the ignition switch off (READY off) during this inspection.)

    Refer to UTILITY [12/2019 - 11/2023]

    1. Connect the GTS to the DLC3.
    2. Turn the ignition switch to ON and turn the GTS on.
    3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
    4. Turn the ignition switch off and wait for 2 minutes or more.
    5. Apply the parking brake and secure the wheels using chocks.
      NOTE:

      Perform this test with the AUTO function (shift-linked function) of the electric parking brake system off.

      HINT: 

      When the parking brake indicator (red) is illuminated after the electric parking brake switch assembly has been pulled to the lock side, the maximum amount of braking force is applied if the electric parking brake switch assembly is pulled to the lock side one more time.

    6. When the vehicle is stationary, turn the ignition switch to ON (READY) with shift lever in P and wait for 1 minute or more.
    7. Turn the air conditioning system on (MAX COLD, blower speed HI).
    8. While depressing the brake pedal without depressing the accelerator pedal, move the shift lever to D and wait for 5 minutes.

      - If step A is performed within the same trip after DTC P0AA6-49 is stored, the parts with insufficient insulation resistance will be determined and a DTC (P1C7C-49, P1C7D-49, P1C7E-49, P1C7F-49 or P1C80-49) will be stored.

      - If no DTCs are output, proceed to the next step.

    9. Drive the vehicle for approximately 5 minutes referring to the following freeze frame data items: "Vehicle Speed", "Shift Position", "Accelerator Position", "Engine Speed", "Coolant Temperature", "Master Cylinder Control Torque", "Inverter Coolant Water Temperature", "Generator Inverter Calculated Temperature" and "Motor Inverter Temperature" (If the freeze frame data item "Vehicle Speed" is 10 km/h (6 mph) or less, drive the vehicle at 10 km/h (6 mph) or more.)

      - If step A is performed within the same trip after DTC P0AA6-49 is stored, the parts with insufficient insulation resistance will be determined and a DTC (P1C7C-49, P1C7D-49, P1C7E-49, P1C7F-49 or P1C80-49) will be stored.

      - If DTC P0AA6-49 is output, complete Step A immediately as quickly as possible.

    10. Wait for 1 minute or more with the vehicle stopped, the ignition switch ON (READY), shift lever in P and the air conditioning system on (Lo/COOL MAX, blower speed HI), then turn the ignition switch off and wait for 2 minutes or more. (Step A)
    11. Turn the ignition switch to ON and turn the GTS on.
    12. Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.
    13. Check the DTC judgment result.

      HINT: 

      • If the judgment result shows NORMAL, the system is normal.
      • If the judgment result shows ABNORMAL, the system has a malfunction.
      • If the judgment result shows INCOMPLETE, perform driving pattern again.
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