Alerts
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| Signal Name | Description | Condition | Impact |
|---|---|---|---|
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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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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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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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Significant main current sensor path offset detected.
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Electronic Power Assist Steering (EPAS) detected a significant offset in calculated main current sensor path output
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Steering feel potentially compromised
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Current sensor in backup measurement mode.
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Current sensor switched to backup measurement due to low printed circuit board (PCB) temperature & serial number
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Electronic Power Assist Steering (EPAS) current sense module in backup measurement mode
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Electronic Power Assist Steering (EPAS) maximum vehicle speed assist applied.
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DI vehicle speed QF degraded below acceptable state
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Electronic Power Assist Steering (EPAS) assist at max vehicle speed level
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Electronic Power Assist Steering (EPAS) transition to DI vehicle speed source.
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ESP_wheelRotation missing or degraded ESP_wheelSpeedQF or degraded DI_speed backup vehicle speed message
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Electronic Power Assist Steering (EPAS) is in reduced assist state, EAC is inhibited
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Invalid DI_speedChecksum value received.
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Unexpected DI_speedChecksum value received by EPAS
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Electronic Power Assist Steering (EPAS) will use V_max reduced assist level if invalid DI_speed message received
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Invalid DI_speedCounter value received.
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DI_speedCounter is not incrementing correctly
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Electronic Power Assist Steering (EPAS) will use V_max reduced assist level if invalid DI_speed message received
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DI_speed - backup vehicle speed - message not received.
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Electronic Power Assist Steering (EPAS) does not receive DI_speed on CAN as expected
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The power steering is operational but the level of assist is decreased and External Angle Controller is inhibited.
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Controller Area Network (CAN) messages received from the vehicle security controller (VCSEC) electronic control unit (ECU) has an invalid checksum value, indicating an error in data integrity has been detected.
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CAN message received from the VCSEC ECU has an invalid checksum value.
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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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Controller Area Network (CAN) message received from the vehicle security controller (VCSEC) electronic control unit (ECU) has an invalid counter value, indicating an error in data integrity has been detected.
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CAN message counter received from the VCSEC ECU does not increment 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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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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The secondary Electronic Power Assist Steering (EPAS3S) electronic control unit (ECU) receives invalid controller area network (CAN) messages from the front drive inverter (DIF) ECU on the Chassis CAN bus.
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The EPAS3S ECU receives invalid CAN messages from the DIF ECU on the Chassis CAN bus.
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Steering assist may be reduced or may not function as expected.
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The secondary Electronic Power Assist Steering (EPAS3S) electronic control unit (ECU) receives invalid controller area network (CAN) messages from the front drive inverter (DIF) ECU on the Chassis CAN bus.
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The EPAS3S ECU receives invalid CAN messages from the DIF ECU on the Chassis CAN bus.
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Steering assist may be reduced or may not function as expected.
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The secondary Electric Power Assist Steering (EPAS3S) electronic control unit (ECU) is not receiving the expected messages from the front drive inverter (DIF) ECU on the Chassis controller area network (CAN) bus.
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The EPAS3S ECU does not receive the expected messages from the DIF ECU on the Chassis CAN bus.
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Steering assist may be reduced or may not function as expected.
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Phase PWM feedback control error.
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Phase PWM feedback control error
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Reduced steering assist
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EPAS3P_status message not received on internal private bus nor vehicle bus.
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EPAS3P_status message not received on internal private bus nor vehicle bus
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Incorrect EPS status on bus
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Invalid APS_eacMonitorChecksum value received.
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Unexpected APS_eacMonitorChecksum value received by EPAS
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External Angle Controller inhibited
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Invalid APS_eacMonitorCounter value received.
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APS_eacMonitorCounter not incrementing correctly
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External Angle Controller inhibited
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