Alerts
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| Signal Name | Description | Condition | Impact |
|---|---|---|---|
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Electronic Parking Brake's learned configuration does not match the reported config from the gateway
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Electronic Parking Brake HW type does not match HW type reported by gateway and 5 seconds have passed since gateway booted up
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Hardware does not match current configuration, parking brake function may be degraded
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EPB's brake HW config is not compatible remote EPB's brake HW config
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Remote EPB is present and local EPB has learnt brake HW config but is not compatible with remote brake HW config
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Remote and local EPB brake HW config is incompatible, parking brake function may be degraded
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DI requested unpark but PM didn't allow it
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DI requests unpark and PM doesn't allow it within 40ms or is MIA
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Fault or error occurred on the DI
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If vehicle reaches 8.8kph, EPB will park
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Vehicle speed of 8.8kph in free roll Mode
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EPB is applied.
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will prevent EPB from parking when the driver leaves
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EPB enters Free Roll Mode from UI request
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Car will be free rolling
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Electronic Parking Brake was attempting to dynamic park, Controlled Deceleration for Parking Brake is unavailable, and speed crossed above 8.8kph
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EPB_unitStatus == EPB_STATUS_DYNAMIC_PARKING, and speed crosses above 8.8kph or acceleration is above 5mph/s
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Car interrupted parking due to travelling at speed, Electronic Parking Brake not applied
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Electronic Parking Brake is performing dynamic apply
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ESM_stateRequest == ESM_DYNAMIC
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Unable to perform Controlled Deceleration for Parking Brake due to Stability Control failing or unavailable
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Stability Control has begun Controlled Deceleration for Parking Brake
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ESM_state == ESM_DYNAMIC_EXTERNAL
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Stability Control is actuating, Electronic Parking Brake may be idle faulted
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Non-nominal termination of dynamic park
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ESM_stateRequest transitions from ESM_DYNAMIC_PARK to any other state, while qualified speed > 0.8kph
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Electronic Parking Brake not applied, car may be free rolling, Stability Control may have failed or is unavailable
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Stability Control reports Controlled Deceleration for Parking Brake is not available when car is in DRIVE
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(ESP_cdpStatus == CDP_IS_NOT_AVAILABLE or VCLEFT/VCRIGHT_okayToRequestCDP == EPB_EXTERNAL_APPLY_INVALID) when VCFRONT_vehiclePowerState == VEHICLE_POWER_STATE_DRIVE
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Electronic Parking Brake Monitor and/or Stability Control are faulted, Controlled Deceleration for Parking Brake cannot be performed
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One Electronic Parking Brake (EPB) not applied, and road grade is too steep to secure vehicle with only one EPB
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Only one Electronic Parking Brake (EPB) applied and grade too steep for one EPB to hold the vehicle
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Car may not be secured by Electronic Parking Brake on current road grade, may be free rolling
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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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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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Customer facing alert for Electronic Parking Brake issues which occur when caliper is not moving
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Electronic Parking Brake has idle fault, or CSM_RQST_INVALID/CSM_RQST_NONE during retry or fault
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Electronic Parking Brake caliper motor may be disconnected (idle fault), or no csm requests during retry/fault
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Motor negative lead voltage is higher than expected while active
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The negative lead voltage measurement is higher than expected. This could be higher than 0.1 voltages if motor is driven in apply direction, or higher than estimated PWM voltage if driven in the release direction.
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Caliper motor or harness may be damaged
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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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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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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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Motor current was lower than expected
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Motor current measurement, with calibration offset subtracted, was lower than 0.25 amps
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Caliper could be disconnected or the harness is damaged.
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More than half of the ECUs on a either the VEH or PARTY bus are missing more than half their messages while the bus should be active
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If 50% or more of the ECUs the local ECUs listens to are MIA, and the local ECU receives from more than 3 ECUs on this bus. An ECU is MIA if more than 50% of its messages are MIA and that ECU is considered CAN active (see specific ECU's MIA alert for CAN active conditions).
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Vehicle functionality may be degraded.
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