Alerts
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| Signal Name | Description | Condition | Impact |
|---|---|---|---|
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Electronic Power Assist Steering (EPAS) digital current sensor (DCS) register CREGx or CTUBx voltage less than expected
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Internal digital current sensor (DCS) CBoot flag is set
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This alert is primarily informational and is used for logging purposes. No expected impact on vehicle functionality.
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x19 is a diagnostic overview register, registers 1A to 1E provides additional granularity for EPAS digital current sensor (DCS) fault concerns
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Any bit is set from the EPAS DCS x19 register
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This alert is primarily informational and is used for logging purposes. No expected impact on vehicle functionality.
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Electric Power Assisted Steering (EPAS) reports unexpected error between internal angle sensor and steering column control module (SCCM) angle sensor.
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The steering system detects divergence between its internal angle sensor and external angle sensor greater than 30 degrees.
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Angle measurement divergence could indicate steering system belt slip or other mechanical failure.
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This alert is reported by the ADCDriverCD_TC3x component when Analog-Digital Converter (ADC) calibration cannot be started, timeout reached. MCU failure.
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EPAS uC peripheral ADC self calibration timeout at startup.
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EPAS full loss of assist. EPAS ADC is considered inoperable.
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This alert is reported by the ADCDriverCD_TC3x component when Analog-Digital Converter (ADC) multiplexer testing failed, the root cause also can be reference problems or short-to-GND/short-to-supply type pin errors.
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Measured REF voltage or Measured GND voltage are out of range.
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EPAS full loss of assist.
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This alert is reported by the ParameterSelectorProvider_R12 (PSP) component when Powerpack (PWP), Common (COM), or ECU parameter selection is not successful.
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EPAS ECU PowerPack (PWP) ID is not compatible with the given software due to ECU parameter set.
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EPAS full loss of assist.
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This alert is reported by the StartupCauseProvider_R12 (SCP) component in case, at least one of the possible reset causes is not available after the provision time has elapsed.
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EPAS has incomplete list of reset causes at startup.
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EPAS has lost info about reset causes.
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This alert is reported by the StartupCauseProvider_R12 (SCP) component when all received causes are unknown startup causes and the determined startup cause is UNKNOWN.
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EPAS detected unknown startup cause at startup.
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EPAS full loss of assist. EPAS is unable to establish why the SW has been started.
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This alert is reported by the SwResetHandler_R12 (SWRH) component when there is a RAM failure: the stored error is not visible OR SW systematic failure: error not stored or not handled.
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EPAS could not retrieve the reset reason store error in RAM.
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EPAS full loss of assist. EPAS is unable to establish why the SW has been started.
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This alert is reported by the TemperatureSensorMCUCore_TC3x (TSMC) component when there is a MCU internal failure (temperature sensor or other failure which generates uneven heating of the MCU).
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EPAS uC core and power supply temperatures exceed tolerated difference.
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EPAS full loss of assist.
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This alert is reported by the MCUSafetyStartupChecks_TC3x (MCUSSC) component when there is a MCU failure. Logic built-in self-test failed.
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EPAS Microcontroller built-in self tests (BIST) that the SW runs after reset failed for 3 consecutive times.
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EPAS full loss of assist.
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This alert is reported by the SoftwareVersionChecker_R12 (SVC) component when the primary and secondary side SW version is different, reflashing is needed.
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EPAS primary and secondary side SW versions are incompatible.
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EPAS full loss of assist.
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This alert is reported by the MCUSafetyStartupChecks_TC3x (MCUSSC) component when there is a MCU internal failure (The Secondary Monitor and Standby SMU Built in Self Test failed).
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EPAS microcontroller (MON)BIST failed (SecondaryMonitor versus Standby SMU) at startup.
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EPAS full loss of assist.
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This alert is reported by the MCUSafetyStartupChecks_TC3x (MCUSSC) component when there is a MCU internal failure. (Memory Built-In-SelfTest failed).
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EPAS microcontroller memory (M)BIST failed at startup.
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EPAS full loss of assist.
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Motor position sensor 1 logic error
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Motor position sensor 1 logic error
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Reduced steering assist
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One or more expected Controller Area Network (CAN) messages from the vehicle security controller (VCSEC) electronic control unit (ECU) was not received
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One or more CAN messages from the VCSEC ECU is not received as expected
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The VCSEC to Electronic Power-Assisted Steering (EPAS) interface is interrupted. Tire-based steering tuning may be affected
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EPAS3P/S_status message not received on internal private bus
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EPAS3P/S_status message is not received on internal private bus
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Incorrect EPS status on bus
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Internal private bus off
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CAN transmit error counter is above 255
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Incorrect EPS status on bus
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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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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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