MyTeslaMate App

Signal Name	Description	Condition	Impact
EPAS3S_a125_trqSensTrimOutRange	Torque sensor zero point calibration out of range	Motor Angle trim service not performed or incorrect value stored	Reduced steering assist, EAC inhibited, SASQF = UNDEFINABLE_ACCURACY
EPAS3S_a124_tempSensStuckInRange	ECU temperature sensor signal stuck in range	ECU temperature sensor signal stuck in range	Reduced steering assist
EPAS3S_a123_combEcu2StatFail	EPAS3S_status message not received on internal private bus nor vehicle bus	EPAS3S_status message not received on private bus nor vehicle bus	Reduced steering assist and EAC inhibited
EPAS3S_a122_olpActive	Overload protection active	Due to sustained torque, output torque is limited	Reduced steering assist and EAC inhibited
EPAS3S_a121_pvtEcuStatCrcError	Invalid EPAS3P/S_statusCrc value received on internal private bus	Unexpected EPAS3P/S_statusCrc value received on internal private bus	Incorrect EPS status on bus
EPAS3S_a127_apsCntError	Invalid APS_eacMonitorCounter value received	APS_eacMonitorCounter not incrementing correctly	External Angle Controller inhibited
EPAS3S_a140_difCsError	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.	The EPAS3S ECU receives invalid CAN messages from the DIF ECU on the Chassis CAN bus.	Steering assist may be reduced or may not function as expected.
EPAS3S_a139_difCntError	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.	The EPAS3S ECU receives invalid CAN messages from the DIF ECU on the Chassis CAN bus.	Steering assist may be reduced or may not function as expected.
EPAS3S_a138_difMia	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.	The EPAS3S ECU does not receive the expected messages from the DIF ECU on the Chassis CAN bus.	Steering assist may be reduced or may not function as expected.
EPAS3S_a120_pvtEcuStatCntError	The electric power assist steering (EPAS) internal private bus is receiving an unexpected status counter value, resulting in the chassis bus electric power assist steering (EPAS3S) Electronic Control Unit (ECU) to lose functionality.	The status counter does not increment as expected.	The power steering function is operational, but steering assist will likely be reduced. A customer facing alert describing a reduced level of assist for power steering may be present. Autopilot may be disabled in some cases.
EPAS3S_a117_ecuStatCrcError	The Electronic Power Assist Steering (EPAS) electronic control unit (ECU) receives invalid controller area network (CAN) messages from the car computer on the CAN bus.	The Electronic Power Assist Steering (EPAS) ECU receives invalid CAN messages from the car computer on the CAN bus.	Steering assist may be reduced or may not function as expected.
EPAS3S_a115_ecuStatMia	EPAS3P/S_status message not received	EPAS3P/S_status message is not received by EPAS	Incorrect EPS status on bus
EPAS3S_a114_gtwConfigMia	GTW_carConfig message not received	GTW_carConfig message is not received by EPAS	Reduced steering assist
EPAS3S_a113_sasStatusError	Invalid SCCM_steeringAngleSensorStatus value received	Invalid SCCM_steeringAngleSensorStatus value received by EPAS	Reduced steering assist and SASQF = UNDEFINABLE_ACCURACY
EPAS3S_a112_sasCsError	Invalid SCCM_steeringAngleSensorCrc value received	Unexpected SCCM_steeringAngleSensorCrc value received by EPAS	Reduced steering assist and SASQF = UNDEFINABLE_ACCURACY
EPAS3S_a128_apsCsError	Invalid APS_eacMonitorChecksum value received	Unexpected APS_eacMonitorChecksum value received by EPAS	External Angle Controller inhibited
EPAS3S_a107_uiTuneReqMia	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.	The Electronic Power Assist Steering (EPAS) ECU does not receive the expected CAN messages from the Gateway on the CAN bus.	Steering assist may be reduced or may not function as expected.
EPAS3S_a100_diMia	The electric power assist steering (EPAS) Electronic Control Unit (ECU) is not receiving the drive inverter torque message, which may be the result of controller area network (CAN) bus issues.	The electric power assist steering (EPAS) Electronic Control Unit (ECU) does not receive the drive inverter torque message.	External Angle Controller is inhibited.
EPAS3S_a099_yawRateStatus	The Electronic Power Assist Steering (EPAS) electronic control unit (ECU) receives invalid controller area network (CAN) messages from the Restraint Control Module (RCM) on the CAN bus.	The Electronic Power Assist Steering (EPAS) ECU receives invalid CAN messages from the RCM on the CAN bus.	Steering assist may be reduced or may not function as expected.
EPAS3S_a098_rcmCsError	The Electronic Power Assist Steering (EPAS) electronic control unit (ECU) receives invalid controller area network (CAN) messages from the Restraint Control Module (RCM) on the CAN bus.	The Electronic Power Assist Steering (EPAS) ECU receives invalid CAN messages from the RCM on the CAN bus.	Steering assist may be reduced or may not function as expected.

EPAS3S_a125_trqSensTrimOutRange

Torque sensor zero point calibration out of range

Motor Angle trim service not performed or incorrect value stored

Reduced steering assist, EAC inhibited, SASQF = UNDEFINABLE_ACCURACY

EPAS3S_a124_tempSensStuckInRange

ECU temperature sensor signal stuck in range

Reduced steering assist

EPAS3S_a123_combEcu2StatFail

EPAS3S_status message not received on internal private bus nor vehicle bus

EPAS3S_status message not received on private bus nor vehicle bus

Reduced steering assist and EAC inhibited

EPAS3S_a122_olpActive

Overload protection active

Due to sustained torque, output torque is limited

Reduced steering assist and EAC inhibited

EPAS3S_a121_pvtEcuStatCrcError

Invalid EPAS3P/S_statusCrc value received on internal private bus

Unexpected EPAS3P/S_statusCrc value received on internal private bus

Incorrect EPS status on bus

EPAS3S_a127_apsCntError

Invalid APS_eacMonitorCounter value received

APS_eacMonitorCounter not incrementing correctly

External Angle Controller inhibited

EPAS3S_a140_difCsError

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.

The EPAS3S ECU receives invalid CAN messages from the DIF ECU on the Chassis CAN bus.

Steering assist may be reduced or may not function as expected.

EPAS3S_a139_difCntError

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.

The EPAS3S ECU receives invalid CAN messages from the DIF ECU on the Chassis CAN bus.

Steering assist may be reduced or may not function as expected.

EPAS3S_a138_difMia

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.

The EPAS3S ECU does not receive the expected messages from the DIF ECU on the Chassis CAN bus.

Steering assist may be reduced or may not function as expected.

EPAS3S_a120_pvtEcuStatCntError

The electric power assist steering (EPAS) internal private bus is receiving an unexpected status counter value, resulting in the chassis bus electric power assist steering (EPAS3S) Electronic Control Unit (ECU) to lose functionality.

The status counter does not increment as expected.

The power steering function is operational, but steering assist will likely be reduced. A customer facing alert describing a reduced level of assist for power steering may be present. Autopilot may be disabled in some cases.

EPAS3S_a117_ecuStatCrcError

The Electronic Power Assist Steering (EPAS) electronic control unit (ECU) receives invalid controller area network (CAN) messages from the car computer on the CAN bus.

The Electronic Power Assist Steering (EPAS) ECU receives invalid CAN messages from the car computer on the CAN bus.

Steering assist may be reduced or may not function as expected.

EPAS3S_a115_ecuStatMia

EPAS3P/S_status message not received

EPAS3P/S_status message is not received by EPAS

Incorrect EPS status on bus

EPAS3S_a114_gtwConfigMia

GTW_carConfig message not received

GTW_carConfig message is not received by EPAS

Reduced steering assist

EPAS3S_a113_sasStatusError

Invalid SCCM_steeringAngleSensorStatus value received

Invalid SCCM_steeringAngleSensorStatus value received by EPAS

Reduced steering assist and SASQF = UNDEFINABLE_ACCURACY

EPAS3S_a112_sasCsError

Invalid SCCM_steeringAngleSensorCrc value received

Unexpected SCCM_steeringAngleSensorCrc value received by EPAS

Reduced steering assist and SASQF = UNDEFINABLE_ACCURACY

EPAS3S_a128_apsCsError

Invalid APS_eacMonitorChecksum value received

Unexpected APS_eacMonitorChecksum value received by EPAS

External Angle Controller inhibited

EPAS3S_a107_uiTuneReqMia

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.

The Electronic Power Assist Steering (EPAS) ECU does not receive the expected CAN messages from the Gateway on the CAN bus.

Steering assist may be reduced or may not function as expected.

EPAS3S_a100_diMia

The electric power assist steering (EPAS) Electronic Control Unit (ECU) is not receiving the drive inverter torque message, which may be the result of controller area network (CAN) bus issues.

The electric power assist steering (EPAS) Electronic Control Unit (ECU) does not receive the drive inverter torque message.

External Angle Controller is inhibited.

EPAS3S_a099_yawRateStatus

The Electronic Power Assist Steering (EPAS) electronic control unit (ECU) receives invalid controller area network (CAN) messages from the Restraint Control Module (RCM) on the CAN bus.

The Electronic Power Assist Steering (EPAS) ECU receives invalid CAN messages from the RCM on the CAN bus.

Steering assist may be reduced or may not function as expected.

EPAS3S_a098_rcmCsError

The Electronic Power Assist Steering (EPAS) electronic control unit (ECU) receives invalid controller area network (CAN) messages from the Restraint Control Module (RCM) on the CAN bus.

The Electronic Power Assist Steering (EPAS) ECU receives invalid CAN messages from the RCM on the CAN bus.

Steering assist may be reduced or may not function as expected.

Alerts

Alerts