Alerts
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| Signal Name | Description | Condition | Impact | Important |
|---|---|---|---|---|
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Torque sensor 2 signal not received
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Torque Sensor 2 signal not received by EPAS
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Steering assist reduced and EAC inhibited
|
No
|
|
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Torque sensor 1 EEPROM errror
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Torque sensor 1 observed failure with the linearity calibrations
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Steering assist reduced and EAC inhibited
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No
|
|
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Torque sensor 1 supply voltage error
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Torque sensor 1 observed failure with the voltage supply
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Steering assist reduced and EAC inhibited
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No
|
|
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Torque sensor 1 signal invalid
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Invalid Torque sensor 1 signal received by EPAS
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Steering assist reduced and EAC inhibited
|
No
|
|
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Torque sensor 1 signal not received
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Torque Sensor 1 signal not received by EPAS
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Steering assist reduced and EAC inhibited
|
No
|
|
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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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No
|
|
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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.
|
No
|
|
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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.
|
No
|
|
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Electric Power Assisted Steering (EPAS) reports its secondary Electronic Control Unit (ECU) activated External Angle Control (EAC).
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The EPAS secondary ECU activates EAC due to a condition affecting the primary ECU.
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Backup EAC is active due to a detected condition on the primary steering ECU.
|
No
|
|
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Electric Power Assisted Steering (EPAS) reports that power steering is unavailable for the remainder of the current power cycle.
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EPAS monitor detects a condition affecting EPAS and disables power steering.
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Power steering is unavailable for the remainder of the current drive cycle.
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No
|
|
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Gate drive SPI communication error
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Gate drive SPI communication errors
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Reduced steering assist
|
No
|
|
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Motor position temperature sensor 2 error
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Motor position temperature sensor 2 error
|
Reduced steering assist
|
No
|
|
|
This alert is reported by the MCUSafetyStartupChecks_TC3x (MCUSSC) component when there is a MCU internal failure. (Memory Built-In-SelfTest failed).
|
EPAS microcontroller memory (M)BIST failed at startup.
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EPAS full loss of assist.
|
No
|
|
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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).
|
EPAS microcontroller (MON)BIST failed (SecondaryMonitor versus Standby SMU) at startup.
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EPAS full loss of assist.
|
No
|
|
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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.
|
No
|
|
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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.
|
No
|
|
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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.
|
No
|
|
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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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No
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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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No
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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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No
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