Alerts
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| Signal Name | Description | Condition | Impact | Important |
|---|---|---|---|---|
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Customer facing alert issued when Electronic Parking Brake is applied at higher than 5mph
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Entry to states ESM_DYNAMIC, ESM_DYNAMIC_EXTERNAL, ESM_DYNAMIC_PENDING
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User facing notification that informs Electronic Parking Brake is dynamically applying
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No
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Vehicle attempted a power state transition which the Electronic Parking Brake did not agree with.
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VCFRONT and EPB vehicle power states are not the same
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A controller may be stuck in the wrong power state. Could block sleep or other functions
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No
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Left and right headlamps report simultaneous matrix manager, LED, High Side Driver (HSD), or Boolean status errors indicating a condition affecting functionality of both headlamps.
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For both headlamps, the SSL100 pixel matrix detects non-functional pixels or has communication issues, or the voltage measured across the Lowbeam Prefield, DRL segments, or Turn LEDs (Model S only) is out of range, or the LED drivers in the ECU have reported status flags, or certain values programmed in the SSL100 EEPROM are out of range, or the fan current is out of range.
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Certain light functions or the headlamp fan may be degraded or disabled for both headlamps.
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No
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One or more of the messages the vehicle controller receives periodically from the rear left door controller (VCDOORRL) is not received, indicating the VCDOORRL may be unavailable (MIA).
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The vehicle controller does not receive one or more of the expected messages from the VCDOORRL within the expected time frame.
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Vehicle functions that depend on the VCDOORRL may be unavailable or may not function as expected.
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No
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Road grade is too steep to secure with Park Brake
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Attempt to engage parking brake when the vehicle is stopped on too steep a road grade for Electronic Parking Brake to secure the vehicle
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Car may not be secured by Electronic Parking Brake on the current road grade, may be free rolling
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No
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User facing to warn that Electronic Parking Brake is in service mode and many Electronic Parking Brake features are disabled
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EPB_unitStatus == SERVICE or SERVICE_RELEASING.
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Electronic Parking Brake will not automatically apply.
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No
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Limp mode activated
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Any critical ECU requests limp
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Vehicle will eventually apply brakes to bring vehicle to stop
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No
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One or more of the expected CAN messages from the Etherloop Generalized Gateway Right (Core 3) were not received, indicating the EGGRIGHT3 ECU may be unavailable (MIA).
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The local ECU does not receive one or more of the expected messages from the EGGRIGHT3 within the expected time frame.
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Vehicle functions that depend on the EGGRIGHT3 may be unavailable or may not function as expected.
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No
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One or more of the messages the vehicle controller receives periodically from the front drive inverter (DIF) electronic control unit (ECU) is not received, indicating the DIF ECU may be unavailable (MIA).
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One or more of the expected messages from the DIF ECU is not received.
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Vehicle speed and power may be limited. Thermal management system features depending on DIF functionality may be limited or unavailable.
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No
|
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EPB is commanding the brakes to bring the vehicle to a stop
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A critical ECU commands actice decel or vehicle is limp for 5 mins
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Vehicle will decelerate
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No
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Motor negative lead voltage is greater than 6.0 volts while inactive
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The Electronic Parking Brake motor is idle, and the negative lead voltage measurement is higher than 6.0 volts.
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Caliper motor or harness may be damaged
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No
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Motor positive lead voltage is greater than 6.0 volts while inactive
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The Electronic Parking Brake motor is idle, and the positive lead voltage measurement is higher than 6.0 volts.
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Caliper motor or harness may be damaged
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No
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The Electronic Parking Brake or Electronic Parking Brake Monitor took longer than expected to save caliper state in non-volatile memory.
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Caliper state saved to Electronic Parking Brake and Electronic Parking Brake Monitor mismatched for more than 500ms
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Non-volatile memory error due to Electronic Parking Brake and Electronic Parking Brake Monitor mismatch
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No
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The Electronic Parking Brake and Electronic Parking Brake Monitor took longer than expected to save caliper state in non-volatile memory.
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Caliper state saved to Electronic Parking Brake and Electronic Parking Brake Monitor mismatched
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Non-volatile memory error due to Electronic Parking Brake and Electronic Parking Brake Monitor mismatch
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No
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Motor current was higher than expected.
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Motor current measurement, with calibration offset subtracted, was higher than 17 amps.
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Caliper motor or harness may be damaged
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No
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The 0 drive offset current captured as calibration was higher than expected.
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The calibration offset current measured when motor is not being driven was higher than 3.0 amps
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Caliper, Electronic Parking Brake controller, or harness could be damaged. Components may be damaged by high temperatures
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No
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The caliper may be disconnected.
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The Electronic Parking Brake motor is idle, and the positive and negative lead's voltage measurement are more than 0.25V different
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Electronic Parking Brake may not be able to apply or release
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No
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One or more of the messages the vehicle controller receives periodically from the front drive inverter (DIF) electronic control unit (ECU) is not received, indicating the DIF ECU may be unavailable (MIA).
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One or more of the expected messages from the DIF ECU is not received.
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Vehicle speed and power may be limited. Thermal management system features depending on DIF functionality may be limited or unavailable.
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No
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Motor negative lead voltage measurement is less than 0.5 volts while inactive
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The Electronic Parking Brake motor is idle, and the negative lead voltage measurement is lower than 0.5 volts.
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Caliper motor or harness may be damaged
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No
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One or more of the messages the vehicle controller receives periodically from the Steering Column Control Module (SCCM) is not received, indicating the SCCM may be unavailable (MIA).
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One or more of the expected messages from the SCCM is not received.
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Vehicle may be unable to shift between drive modes.
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No
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