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Home >> Toyota >> 2019 >> Prius Prime Advanced >> Repair and Diagnosis (Single Page) >> Hybrid/Electric Powertrain >> Battery Management Systems >> Hybrid Battery System - Diagnostic Codes (4 Of 5) >> Hybrid Battery System >> DTC P1AC4-13: Hybrid/EV Battery Stack 1 Current Interrupt Device Circuit Open; DTC P1AC5-13: Hybrid/EV Battery Stack 2 Current Interrupt Device Circuit Open; DTC P1AC6-13: Hybrid/EV Battery Stack 3 Current Interrupt Device Circuit Open; DTC P1AC7-13: Hybrid/EV Battery Stack 4 Current Interrupt Device Circuit Open; DTC P1AC8-13: Hybrid/EV Battery Stack 5 Current Interrupt Device Circuit Open [09/2016 - ] >> Caution / Notice / Hint
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Caution / Notice / Hint

WARNING:
  • Before the following operations are conducted, take precautions to prevent electric shock by turning the power switch off, wearing insulated gloves, and removing the service plug grip from HV battery.
    Fig 1: Wear Insulated Gloves
    GTY588386Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • Inspecting the high-voltage system
    • Disconnecting the low voltage connector of the inverter with converter assembly
    • Disconnecting the low voltage connector of the HV battery
    • Disconnecting the low voltage connector of the electric vehicle charger assembly
  • To prevent electric shock, make sure to remove the service plug grip to cut off the high voltage circuit before servicing the vehicle.
    Fig 2: Do Not Service The Vehicle Before Cutting Of The High-Voltage Circuit
    GTY687067Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  • After removing the service plug grip from the HV battery, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
    Fig 3: Do Not Leave Service Plug Grip Accessible To Other Technicians
    GTY703958Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  • After removing the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.

    Refer to PRECAUTION [09/2016 - 07/2020] , or refer to PRECAUTION [07/2020 - ]

    Fig 4: Do Not Service Vehicle Without Waiting At Least 10 Minutes To Discharge The High-Voltage Capacitor
    GTY698433Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a Without waiting for 10 minutes

    HINT: 

    Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly and the electric vehicle charger assembly.

  • When disposing of an HV battery, make sure to return it through an authorized collection agent who is capable of handling it safely. If the HV battery is returned via the manufacturer specified route, it will be returned properly and in a safe manner by an authorized collection agent.
    Fig 5: Do Not Service Vehicle Without Returning HV Battery Through An Authorized Collection Agent
    GTY724560Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a Dealer
    *b Battery Collection Agent
    • Accidents such as electric shock may result if the HV battery is disposed of improperly or abandoned. Therefore, make sure to return all HV batteries through an authorized collection agent.
  • Before returning the HV battery, make sure to perform a recovery inspection.

    Refer to RECOVERY INSPECTION [09/2016 - ]

  • Before returning the HV supply stack sub-assembly, make sure to perform a recovery inspection.

    Refer to RECOVERY INSPECTION [09/2016 - ]

  • Make a note of the output DTCs as some of them may be necessary for recovery inspection of the HV battery and HV supply stack sub-assemblies.
  • After removing the HV battery, keep it away from water. Exposure to water may cause the HV battery to produce heat, resulting in a fire.
    Fig 6: Do Not Expose HV Battery To Moisture
    GTY734750Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NOTE:
  • After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

    Refer to PRECAUTION [09/2016 - 01/2018] , or refer to PRECAUTION [01/2018 - 05/2019] , or refer to PRECAUTION [05/2019 - ]

  • Do not turn the power switch on (READY) until the repair is completed.