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Read or Write HV Battery Serial Number

Gen3/tasks/PROC_HVC_X_READ-WRITE-PACK-SERIAL-NUMBER

What this task does

This routine provides the ability to read or write the HV battery serial number from/to the High Voltage Controller (HVC).

Vehicle compatibility

Select your vehicle’s hardware to see task details, requirements, and inputs. Availability is confirmed after connection.

Model 3 / Y AMD
Vehicle coverage
2024+ Model 3, 2025+ Model Y, Model Y, Pre-2024 Model 3
Supported connection
Local connection
Vehicle state
Stationary · Neutral; Stationary · Parked
Gateway diagnostic level
Park, Factory, DiagLinkActive, Service

Procedure notes

Entering an incorrect serial number will result in inaccurate displayed range values. Pack contactors will open and then close shortly after.

Task inputs (2)

Operation

OPERATION · String

Select wether to read or write the HV battery serial number.

Default: READ

Options: READ, WRITE

Serial Number

SERIAL_NUMBER · String

Enter the HV battery serial number, if write operation selected.

Default: Not specified

Model 3 / Y Intel
Vehicle coverage
Model Y, Pre-2024 Model 3
Supported connection
Local connection
Vehicle state
Stationary · Neutral; Stationary · Parked
Gateway diagnostic level
Park, Factory, DiagLinkActive, Service

Procedure notes

Entering an incorrect serial number will result in inaccurate displayed range values. Pack contactors will open and then close shortly after.

Task inputs (2)

Operation

OPERATION · String

Select wether to read or write the HV battery serial number.

Default: READ

Options: READ, WRITE

Serial Number

SERIAL_NUMBER · String

Enter the HV battery serial number, if write operation selected.

Default: Not specified

Model S / X (2021+) AMD
Vehicle coverage
2021+ Model S, 2021+ Model X
Supported connection
Local connection
Vehicle state
Stationary · Neutral; Stationary · Parked
Gateway diagnostic level
Park, Factory, DiagLinkActive, Service

Procedure notes

Entering an incorrect serial number will result in inaccurate displayed range values. Pack contactors will open and then close shortly after.

Task inputs (2)

Operation

OPERATION · String

Select wether to read or write the HV battery serial number.

Default: READ

Options: READ, WRITE

Serial Number

SERIAL_NUMBER · String

Enter the HV battery serial number, if write operation selected.

Default: Not specified

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Service procedures

After HV Battery Replacement

Before running this routine, a Controller Area Network (CAN) Electronic Control Unit (ECU) redeploy needs to pass. After a High Voltage (HV) Battery replacement, this routine runs all required tasks.

PROC_HVC_X_PACK-REPLACEMENT

Model 3 / Y Model S / X (2021+)
Service procedures

Clear HVC Battery Coolant Flood Alert

Clears the HVC battery coolant flood alert, BMS_a124_Battery_Coolant_Flood, if set. This routine shall only be executed after repairing the HV battery isolation issue.

PROC_HVC_X_CLEAR-BATTERY-COOLANT-FLOOD-ALERT

Model 3 / Y Model S / X (2021+)
Service procedures

Clear HVC Internal Isolation Alert

Clears the HVC internal isolation alert, BMS_a123_SW_Internal_Isolation, if set. This routine shall only be executed after repairing the HV battery isolation issue.

PROC_HVC_X_CLEAR-INTERNAL-ISOLATION-ALERT

Model 3 / Y Model S / X (2021+)
Service procedures

Clear HVC Isolation Condition

Clears the High Voltage Controller (HVC) isolation counters and alerts BMS_a027_SW_Repeated_Isolation_Failure_In_Drive, BMS_a172_SW_Isolation_Failure_In_Drive_Warning, BMS_a123_SW_Internal_Isolation, and BMS_a124_Battery_Coolant_Flood, if set. This routine shall only be executed after repairing a HV system component for loss of isolation.

PROC_HVC_X_CLEAR-ISOLATION-CONDITION

Model 3 / Y Model S / X (2021+)