Alerts
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| Signal Name | Description | Condition | Impact |
|---|---|---|---|
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This alert is reported by the DCVoltageMonitor_T222 (DCVM) component when underVoltage is detected.
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EPAS has detected supply undervoltage (less than 9v [Calibratable]).
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Assist is disabled.
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This alert is reported by the DCVoltageMonitor_T222 (DCVM) component when overVoltage is detected.
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EPAS has detected supply overvoltage (higher than 18v [calibratable]).
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Assist is disabled.
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This alert is reported when the PM_STATE2 message is absent.
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PM_state2 message not received by EPAS.
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No impact - PM_state2 message is not used by EPAS.
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VCFRONT_LVPowerState message not received.
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VCFRONT_LVPowerState message is not received by EPAS
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Leads to Loss of EPS at init
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Invalid VCFRONT_LVPowerStateChecksum value received.
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Unexpected VCFRONT_LVPowerStateChecksum received
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Leads to Loss of EPS at init
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Invalid VCFRONT_LVPowerStateCounter value received.
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VCFRONT_LVPowerStateCounter is not incrementing correctly
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Leads to Loss of EPS at init
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The Electric Power Assist Steering (EPAS) electronic control unit (ECU) is not receiving the expected controller area network (CAN) messages from the Gateway (GTW) on the CAN bus.
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The Electronic Power Assist Steering (EPAS) ECU does not receive the expected CAN messages from the Gateway on the CAN bus.
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Steering assist may be reduced or may not function as expected.
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Invalid UI_chassisControlChecksum value received.
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Unexpected UI_chassisControlChecksum value received
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Reduced steering assist
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Invalid UI_chassisControlCounter value received.
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UI_chassisControlCounter is not incrementing correctly
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Reduced steering assist
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SCCM_steeringAngleSensor message not received.
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SCCM_steeringAngleSensor message is not received by EPAS
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Reduced steering assist and SASQF = UNDEFINABLE_ACCURACY
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Invalid SCCM_steeringAngleSensorCrc value received.
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Unexpected SCCM_steeringAngleSensorCrc value received by EPAS
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Reduced steering assist and SASQF = UNDEFINABLE_ACCURACY
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Invalid SCCM_steeringAngleSensorCounter value received.
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SCCM_steeringAngleSensorCounter is not incrementing correctly
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Reduced steering assist and SASQF = UNDEFINABLE_ACCURACY
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The Electric Power Assist Steering (EPAS) electronic control unit (ECU) is not receiving the expected controller area network (CAN) messages from the Restraint Control Module (RCM) on the CAN bus.
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The Electronic Power Assist Steering (EPAS) ECU does not receive the expected CAN messages from the RCM on the CAN bus.
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Steering assist may be reduced or may not function as expected. Since External Angle Control (EAC) requests may be rejected, Autopilot features may be unavailable or may not function as expected.
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This alert is reported when the Actuator Manager (AM) NvM Health status may be corrupted.
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If the FET short diagnostic's previous test execution status s not readable from the NvM.
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No impact
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This alert is reported by the OnlineStackUsageMonitor_R12 (OSUM) componen twhen context switch area usage on core 0 is almost full.
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EPAS memory usage monitor detected high consumption warning (context switch area on Core0).
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No impact
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This alert is reported by the ExceptionHandler_TC3x (EXHA) component when there is a SPB bus violation.
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EPAS application component ExceptionHandler detected exception (SPB bus violation).
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EPAS reset
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This alert is reported by MCUSafetyStartupChecks_TC3x (MCUSSC) component when the flashed SW is incorrect or flash memory failure.
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EPAS has detected flashed SW data integrity failure (ECC) but the number of faults didn't reached the tolerated limits.
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EPAS reset. If reset more than 6 then EPAS fallback to bootloader.
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This alert is reported by MCUSafetyStartupChecks_TC3x (MCUSSC) component when the memory Built-In-SelfTest failed, errors in the critical memory units. MCU failure.
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EPAS memory BIST found any errors in critical memory units (CPU0, CPU1, DMA).
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EPAS reset. If reset more than 6 then EPAS fallback to bootloader.
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This alert is reported by the PhaseCurrentProvider_R12 (PCP) component if both primary and secondary current measurement channels are in saturation state and the debounce counter reaches its limit. If both current measurement channels are saturated, we assume that there is a shorted FET in the bridge. This diagnostic signals it.
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EPAS bridge FET short failure. Primary and secondary current measurement channels are in saturation state for longer than a tolerated time.
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EPAS full loss of assist
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This alert is reported by the ExceptionHandler_TC3x (EXCH) component when exception with reset before the previous similar error was reported. The alert is reported after reset if several exceptions in ASIL D partition were caught before reset.
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EPAS application component ExceptionHandler detected additional exceptions in ASIL D partition after a reset.
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EPAS reset
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