MyTeslaMate App

Signal Name	Description	Condition	Impact	Important
SSFAM_a120_DI_DRIVE_MIA	One or more of the messages the vehicle controller receives periodically from the drive interface (DI) electronic control unit (ECU) is not received while the vehicle is in Drive, indicating the DI ECU may be unavailable (MIA).	One or more of the expected messages from the DI ECU is not received while the vehicle is in Drive.	Vehicle speed and power may be limited.	No
SSFAM_a119_SCCM_MIA	One or more of the messages the vehicle controller receives periodically from the Steering Column Control Module (SCCM) is not received, indicating the SCCM may be unavailable (MIA).	One or more of the expected messages from the SCCM is not received.	Vehicle may be unable to shift between drive modes.	No
SSFAM_a118_VCLEFT1_MIA	One or more of the messages the vehicle controller receives periodically from the left vehicle controller (VCLEFT1) is not received, indicating the VCLEFT1 may be unavailable (MIA).	The vehicle controller does not receive one or more of the expected messages from the VCLEFT1 within the expected time frame.	Vehicle functions that depend on the VCLEFT1 may be unavailable or may not function as expected.	No
SSFAM_a117_VCRIGHT_MIA	One or more of the messages the vehicle controller receives periodically from the right vehicle controller (VCRIGHT) is not received, indicating the VCRIGHT may be unavailable (MIA).	The vehicle controller does not receive one or more of the expected messages from the VCRIGHT within the expected time frame.	Vehicle functions that depend on the VCRIGHT may be unavailable or may not function as expected.	No
SSFAM_a116_VCLEFT_MIA	One or more of the messages the vehicle controller receives periodically from the left vehicle controller (VCLEFT) is not received, indicating the VCLEFT may be unavailable (MIA).	The vehicle controller does not receive one or more of the expected messages from the VCLEFT within the expected time frame.	Vehicle functions that depend on the VCLEFT may be unavailable or may not function as expected.	No
SSFAM_a115_VCRIGHT1_MIA	One or more of the messages the vehicle controller receives periodically from the right vehicle controller (VCRIGHT1) is not received, indicating the VCRIGHT1 may be unavailable (MIA).	The vehicle controller does not receive one or more of the expected messages from the VCRIGHT1 within the expected time frame.	Vehicle functions that depend on the VCRIGHT1 may be unavailable or may not function as expected.	No
SSFAM_a208_startupSequenceFailed2	Power steering startup sequence is unsuccessful.	Monitor calibration check is unsuccessful, corresponding controller is not responding, or state timeout occurs.	The motor is disqualified and system health is degraded.	No
SSFAM_a114_ESP_MIA	One or more expected Controller Area Network (CAN) messages from the Electronic Stability Program (ESP) electronic control unit (ECU) was not received. Stability and traction control functions may be unavailable, or their performance may be affected.	An expected CAN message from the Electronic Stability Program (ESP) electronic control unit (ECU) has not been received within the expected timeout, or the message drop rate is too high while the ESP is CAN active.	Stability and traction control functions may be unavailable, or their performance may be affected.	No
SSFAM_a112_EPBL_MIA	One or more of the messages the vehicle controller receives periodically from the left Electronic Park Brake (EPBL) electronic control unit (ECU) is not received, indicating the EPBL ECU may be unavailable (MIA).	The vehicle controller does not receive one or more of the expected messages from the EPBL ECU within the expected time frame.	The parking brake may be unavailable or may not function as expected.	No
SSFAM_a111_EPBR_MIA	One or more of the messages the vehicle controller receives periodically from the right Electronic Park Brake (EPBR) electronic control unit (ECU) is not received, indicating the EPBR ECU may be unavailable (MIA).	The vehicle controller does not receive one or more of the expected messages from the EPBR ECU within the expected time frame.	The parking brake may be unavailable or may not function as expected.	No
SSFAM_a110_GTW_MIA	One or more expected Controller Area Network (CAN) messages from the vehicle gateway (GTW) was not received. Vehicle functions that depend on CAN messages from the GTW may be unavailable, or their performance may be affected.	An expected CAN message from the vehicle gateway (GTW) has not been received within the expected timeout, or the message drop rate is too high while the GTW is CAN active.	Vehicle functions that depend on CAN messages from the vehicle gateway (GTW) may be unavailable, or their performance may be affected.	No
SSFAM_a109_RCM_MIA	One or more of the messages the vehicle controller receives periodically from the Restraint Control Module (RCM) is not received, indicating the RCM may be unavailable (MIA).	The vehicle controller does not receive one or more of the expected messages from the RCM within the expected time frame.	Vehicle functions that depend on the RCM may be unavailable or may not function as expected.	No
SSFAM_a108_DIF_MIA	One or more of the messages the vehicle controller receives periodically from the front drive inverter (DIF) electronic control unit (ECU) is not received, indicating the DIF ECU may be unavailable (MIA).	One or more of the expected messages from the DIF ECU is not received.	Vehicle speed and power may be limited. Thermal management system features depending on DIF functionality may be limited or unavailable.	No
SSFAM_a100_CANbus_MIA	More than half of the Electronic Control Units (ECUs) on either the Left CAN (LC) or Right CAN (RC) bus are missing more than half their messages while the bus should be active.	If 50% or more of the ECUs the local ECUs listens to are MIA, and the local ECU receives from more than 3 ECUs on this bus. An ECU is MIA if more than 50% of its messages are MIA and that ECU is considered CAN active (see specific ECU's MIA alert for CAN active conditions).	Vehicle functionality may not operate as expected.	No
STITCH1_a041_Ref_1V5_Invalid	The 1V5 reference voltage reading is outside of the expected minimum and maximum thresholds.	The 1V5 reference voltage is outside of the expected minimum and maximum range for the given time interval.	STITCH will throw warning.	No
STITCH1_a038_LV_Current_Ctrl_Fail	A controller trip error has been detected due to Low Voltage (LV) current measurement and reference exceeding the expected difference threshold during steady state operation.	LV voltage current measurement and reference difference is above the expected threshold for the given time interval.	STITCH will halt operation due to LV current controller failure.	No
SSFAM_a163_calibrationFault	The steering monitor detected an error affecting its calibration	One or more modules not calibrated or calibration values do not match controller values	Loss of steering redundancy	No
SSFA_a126_PSFAInterfaceHashMismatch	Steering feedback actuator is experiencing an interface mismatch	Steering feedback actuator has incompatible software	Steering feedback actuator may not function as intended or may limit driving modes	No
SSFA_a173_thermalDerating	Steering system may be reducing power and functionality to prevent overheating, due to higher than nominal system temperature detected	When part of steering system is detected to be close to its overheating limit	Torque output may be reduced, and steering system may have reduced performance	No
SSFAM_a260_monitorTripDetected	A monitor trip has been detected, system will degrade	Any of the monitors on the given ECU has detected an issue	Steering system performance degraded, vehicle speed limited	No

SSFAM_a120_DI_DRIVE_MIA

One or more of the messages the vehicle controller receives periodically from the drive interface (DI) electronic control unit (ECU) is not received while the vehicle is in Drive, indicating the DI ECU may be unavailable (MIA).

One or more of the expected messages from the DI ECU is not received while the vehicle is in Drive.

Vehicle speed and power may be limited.

No

SSFAM_a119_SCCM_MIA

One or more of the messages the vehicle controller receives periodically from the Steering Column Control Module (SCCM) is not received, indicating the SCCM may be unavailable (MIA).

One or more of the expected messages from the SCCM is not received.

Vehicle may be unable to shift between drive modes.

No

SSFAM_a118_VCLEFT1_MIA

One or more of the messages the vehicle controller receives periodically from the left vehicle controller (VCLEFT1) is not received, indicating the VCLEFT1 may be unavailable (MIA).

The vehicle controller does not receive one or more of the expected messages from the VCLEFT1 within the expected time frame.

Vehicle functions that depend on the VCLEFT1 may be unavailable or may not function as expected.

No

SSFAM_a117_VCRIGHT_MIA

One or more of the messages the vehicle controller receives periodically from the right vehicle controller (VCRIGHT) is not received, indicating the VCRIGHT may be unavailable (MIA).

The vehicle controller does not receive one or more of the expected messages from the VCRIGHT within the expected time frame.

Vehicle functions that depend on the VCRIGHT may be unavailable or may not function as expected.

No

SSFAM_a116_VCLEFT_MIA

One or more of the messages the vehicle controller receives periodically from the left vehicle controller (VCLEFT) is not received, indicating the VCLEFT may be unavailable (MIA).

The vehicle controller does not receive one or more of the expected messages from the VCLEFT within the expected time frame.

Vehicle functions that depend on the VCLEFT may be unavailable or may not function as expected.

No

SSFAM_a115_VCRIGHT1_MIA

One or more of the messages the vehicle controller receives periodically from the right vehicle controller (VCRIGHT1) is not received, indicating the VCRIGHT1 may be unavailable (MIA).

The vehicle controller does not receive one or more of the expected messages from the VCRIGHT1 within the expected time frame.

Vehicle functions that depend on the VCRIGHT1 may be unavailable or may not function as expected.

No

SSFAM_a208_startupSequenceFailed2

Power steering startup sequence is unsuccessful.

Monitor calibration check is unsuccessful, corresponding controller is not responding, or state timeout occurs.

The motor is disqualified and system health is degraded.

No

SSFAM_a114_ESP_MIA

One or more expected Controller Area Network (CAN) messages from the Electronic Stability Program (ESP) electronic control unit (ECU) was not received. Stability and traction control functions may be unavailable, or their performance may be affected.

An expected CAN message from the Electronic Stability Program (ESP) electronic control unit (ECU) has not been received within the expected timeout, or the message drop rate is too high while the ESP is CAN active.

Stability and traction control functions may be unavailable, or their performance may be affected.

No

SSFAM_a112_EPBL_MIA

One or more of the messages the vehicle controller receives periodically from the left Electronic Park Brake (EPBL) electronic control unit (ECU) is not received, indicating the EPBL ECU may be unavailable (MIA).

The vehicle controller does not receive one or more of the expected messages from the EPBL ECU within the expected time frame.

The parking brake may be unavailable or may not function as expected.

No

SSFAM_a111_EPBR_MIA

One or more of the messages the vehicle controller receives periodically from the right Electronic Park Brake (EPBR) electronic control unit (ECU) is not received, indicating the EPBR ECU may be unavailable (MIA).

The vehicle controller does not receive one or more of the expected messages from the EPBR ECU within the expected time frame.

The parking brake may be unavailable or may not function as expected.

No

SSFAM_a110_GTW_MIA

One or more expected Controller Area Network (CAN) messages from the vehicle gateway (GTW) was not received. Vehicle functions that depend on CAN messages from the GTW may be unavailable, or their performance may be affected.

An expected CAN message from the vehicle gateway (GTW) has not been received within the expected timeout, or the message drop rate is too high while the GTW is CAN active.

Vehicle functions that depend on CAN messages from the vehicle gateway (GTW) may be unavailable, or their performance may be affected.

No

SSFAM_a109_RCM_MIA

One or more of the messages the vehicle controller receives periodically from the Restraint Control Module (RCM) is not received, indicating the RCM may be unavailable (MIA).

The vehicle controller does not receive one or more of the expected messages from the RCM within the expected time frame.

Vehicle functions that depend on the RCM may be unavailable or may not function as expected.

No

SSFAM_a108_DIF_MIA

One or more of the messages the vehicle controller receives periodically from the front drive inverter (DIF) electronic control unit (ECU) is not received, indicating the DIF ECU may be unavailable (MIA).

One or more of the expected messages from the DIF ECU is not received.

Vehicle speed and power may be limited. Thermal management system features depending on DIF functionality may be limited or unavailable.

No

SSFAM_a100_CANbus_MIA

More than half of the Electronic Control Units (ECUs) on either the Left CAN (LC) or Right CAN (RC) bus are missing more than half their messages while the bus should be active.

If 50% or more of the ECUs the local ECUs listens to are MIA, and the local ECU receives from more than 3 ECUs on this bus. An ECU is MIA if more than 50% of its messages are MIA and that ECU is considered CAN active (see specific ECU's MIA alert for CAN active conditions).

Vehicle functionality may not operate as expected.

No

STITCH1_a041_Ref_1V5_Invalid

The 1V5 reference voltage reading is outside of the expected minimum and maximum thresholds.

The 1V5 reference voltage is outside of the expected minimum and maximum range for the given time interval.

STITCH will throw warning.

No

STITCH1_a038_LV_Current_Ctrl_Fail

A controller trip error has been detected due to Low Voltage (LV) current measurement and reference exceeding the expected difference threshold during steady state operation.

LV voltage current measurement and reference difference is above the expected threshold for the given time interval.

STITCH will halt operation due to LV current controller failure.

No

SSFAM_a163_calibrationFault

The steering monitor detected an error affecting its calibration

One or more modules not calibrated or calibration values do not match controller values

Loss of steering redundancy

No

SSFA_a126_PSFAInterfaceHashMismatch

Steering feedback actuator is experiencing an interface mismatch

Steering feedback actuator has incompatible software

Steering feedback actuator may not function as intended or may limit driving modes

No

SSFA_a173_thermalDerating

Steering system may be reducing power and functionality to prevent overheating, due to higher than nominal system temperature detected

When part of steering system is detected to be close to its overheating limit

Torque output may be reduced, and steering system may have reduced performance

No

SSFAM_a260_monitorTripDetected

A monitor trip has been detected, system will degrade

Any of the monitors on the given ECU has detected an issue

Steering system performance degraded, vehicle speed limited

No

Alerts

Alerts