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Service procedures 2026 firmware

Force HVIL Current Source On

Gen3/tasks/PROC_HVP_X_FORCE-HVIL-ON

What this task does

Forces the High Voltage Processor (HVP) High Voltage Interlock Loop (HVIL) current source to be on for the specified duration in seconds. When the routine completes, the HVIL current source is no longer being forced on. To end the routine early, perform a Gateway (GTW) reboot through scroll wheel reset."

Vehicle & firmware coverage

Open a version to see its description, requirements, and input definitions. Hardware configuration and live vehicle checks also determine availability.

Model 3 / Y AMD · Firmware 2026.32.3
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
Service, Factory, DiagLinkActive

Task inputs (1)

Time in Seconds to Force HVIL ON

seconds · Int

The number of seconds to force the HVIL ON.

Firmware default: 60

Model 3 / Y Intel · Firmware 2026.32.7
Vehicle coverage
Model Y, Pre-2024 Model 3
Supported connection
Local connection
Vehicle state
Stationary · Neutral; Stationary · Parked
Gateway diagnostic level
Service, Factory, DiagLinkActive

Task inputs (1)

Time in Seconds to Force HVIL ON

seconds · Int

The number of seconds to force the HVIL ON.

Firmware default: 60

Model S / X (2021+) AMD · Firmware 2026.20.6.1
Vehicle coverage
2021+ Model S, 2021+ Model X
Supported connection
Local connection
Vehicle state
Stationary · Neutral; Stationary · Parked
Gateway diagnostic level
Service, Factory, DiagLinkActive

Task inputs (1)

Time in Seconds to Force HVIL ON

seconds · Int

The number of seconds to force the HVIL ON.

Firmware default: 60

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Self-tests

Charge Port Interlock Loop (CPIL) Self Test

This routine tests the Charge Port Interlock Loop (CPIL) is working properly, ensuring the charge port HV connection at the HV battery is made.

TEST-SELF_HVP_X_CP-INTERLOCK

Model 3 / Y
Self-tests

HVP and PCS Enable Line Interface Test

Diagnoses an issue between the High Voltage Processor (HVP) and Power Conversion System (PCS). Enables wiring interface by toggling the DCDC, CHG, and PCS enable lines between the HVP and PCS. If the PCS, HVP, and/or Battery Management System (BMS) are absent, all three lines will report a failure.

TEST-SELF_HVP_X_PCS-INTERFACE

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

HVP CAN Communication Test

This routine will test if the High Voltage Processor (HVP) is communicating over CAN. Note that if the High Voltage Battery Management System (HVBMS) is MIA, this routine may falsely fail since the HVBMS forwards all HVS components status' to the Gateway.

PING-TP_HVP

Model 3 / Y Model S / X (2021+)
Self-tests

HVP Charge Port Interface Test

This routine performs a self test of the HVP charge port (CP) interface.

TEST-SELF_HVP_X_CP-INTERFACE

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