Lexus ES: Hybrid/EV Battery Control System Over Temperature (P30004B)

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
4. Turn the power switch off and wait for 2 minutes or more.
5. Turn the power switch on (IG) and turn the Techstream on.
6. Drive the vehicle for approximately 10 minutes according to the freeze frame data items "Vehicle Speed", "Hybrid/EV Battery Temperature 1 to 6", "Hybrid/EV Battery Cooling Fan Intake Air Temperature 1", "Ambient Temperature" and "Hybrid/EV Battery Current".
7. Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
8. 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 or N/A, perform driving pattern again.

CAUTION:

• 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.
  • 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
• To prevent electric shock, make sure to remove the service plug grip to cut off the high voltage circuit before servicing the vehicle.
• 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.
• 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.

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  *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.

• Make sure to insulate the high-voltage connectors and terminals of the HV battery with insulating tape after removing it.

  If the HV battery stored without insulating the connectors and terminals, electric shock or fire may result.

• 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.

  *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.

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

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• 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.

 Hybrid/EV Battery Control System Circuit Voltage Below Threshold (P300016)

 Hybrid/EV Battery Voltage High (P31B300)

 Extreme Hybrid/EV Battery Charging Current (P31B400)

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