MyTeslaMate App

Signal Name	Description	Condition	Impact
VCFRONT_a156_louverBlockage	The vehicle controller detects the front louver, or active grill shutter (AGS), is reporting a blockage.	The front louver does not pass the calibration range check after 5 calibration cycles due to under-travel.	Cabin climate control system air conditioning may be limited or unavailable. Powertrain performance may be limited.
VCFRONT_a157_louverBreakage	The vehicle controller detects the front louver, or active grill shutter (AGS), is unable to calibrate and traveled farther than the expected range without reaching the end stop, indicating the front louver may be damaged.	The front louver does not pass the calibration range check after 5 calibration cycles due to over-travel.	Cabin climate control system air conditioning may be limited or unavailable. Powertrain performance may be limited.
VCFRONT_a162_compressorInhibitedContext	Refrigerant compressor operation is inhibited. Cabin cooling (air conditioning) will be disabled. Powertrain performance may be limited. Other alerts relevant to the specific condition should be present, including refrigDischg (refrigerant discharge), refrigSuct (refrigerant suction), exvMotor (chiller EXV motor), evapSolenoid (evaporator solenoid), or thmlFan (thermal fan) alerts.	A condition affecting refrigerant system hardware is detected, the refrigerant compressor has an internal condition affecting performance, or other abnormal refrigerant system conditions are detected.	Cabin cooling (air conditioning) will be disabled. Powertrain performance may be limited.
VCFRONT_a150_pumpChillerLowRPMCBang	The vehicle controller detects the chiller pump motor is unable to reach the target RPM, which may prevent the chiller pump from running as expected.	The chiller pump motor is unable to reach the target RPM.	Powertrain performance may be limited.
VCFRONT_a151_pumpPtLowRPMCBang	The vehicle controller detects the powertrain pump motor is unable to reach the target RPM, which may prevent the powertrain pump from running as expected.	The powertrain pump motor is unable to reach the target RPM.	Powertrain performance may be limited.
VCFRONT_a164_eFuseLckoutMissing	The front vehicle controller (VCFRONT) detects the voltage on the lockout circuit is not high enough when the right vehicle controller (VCRIGHT) reports the lockout circuit active, indicating the eFuse lockout is not successfully asserted.	VCFRONT detects the voltage on the lockout circuit is not measured at 5V over 2 seconds when VCRIGHT reports that the lockout circuit is active.	No functionality should be directly affected when eFuse lockout is missing. However, one or more eFuses may toggle between enabled / not enabled states if the VCFRONT is reset and its non-volatile random access memory (NVRAM) does not function as expected. Note: VCFRONT should not attempt to toggle eFuses via the enable line when lockout is asserted, even after a reset.
VCFRONT_a152_thmlFanLowRPMCBang	The vehicle controller detects the thermal fan motor is unable to reach the target RPM, which may prevent the thermal fan from running as expected.	The thermal fan motor is unable to reach the target RPM.	Cabin climate control system air conditioning may be limited or unavailable. Powertrain performance may be limited.
VCFRONT_a166_rightHCMMIA	One or more of the messages the vehicle controller receives periodically from the right headlamp controller is not received, indicating the right headlamp controller may be unavailable (MIA).	The vehicle controller does not receive one or more of the expected messages from the right headlamp controller within the expected time frame over the local interconnect network (LIN).	The right headlamp may be unavailable or may not function as expected.
VCFRONT_a143_pumpChillerICTransFault	The front vehicle controller (VCFRONT) detects the LV8907 integrated circuit on the chiller pump motor issued a circuit warning, which may prevent the chiller pump from running as expected.	The LV8907 integrated circuit on the on the chiller pump motor issues a circuit warning that prevents the motor controller from driving the motor.	Powertrain performance may be limited.
VCFRONT_a144_pumpPtICTransFault	The front vehicle controller (VCFRONT) detects the LV8907 integrated circuit on the powertrain pump motor issued a circuit warning, which may prevent the powertrain pump from running as expected.	The LV8907 integrated circuit on the on the powertrain pump motor issues a circuit warning that prevents the motor controller from driving the motor.	Powertrain performance may be limited.
VCFRONT_a145_thmlFanICTransFault	The vehicle controller detects the LV8907 integrated circuit on the thermal fan motor issued a circuit warning, which may prevent the thermal fan from running as expected.	The LV8907 integrated circuit on the thermal fan motor issues a circuit warning that prevents the motor controller from driving the motor.	Cabin climate control system air conditioning may be limited or unavailable. Powertrain performance may be limited.
VCFRONT_a143_pumpBatICTransFault	The vehicle controller detects the LV8907 integrated circuit on the battery pump motor issued a circuit warning, which may prevent the battery pump from running as expected.	The LV8907 integrated circuit on the on the battery pump motor issues a circuit warning that prevents the motor controller from driving the motor.	Powertrain performance may be limited.
VCFRONT_a140_coolantTempPtSns	The front vehicle controller (VCFRONT) detects the powertrain coolant loop inlet temperature sensor is experiencing an electrical condition (short or disconnect).	The powertrain coolant loop inlet temperature sensor reads a power rail or ground reference voltage.	Powertrain performance may be limited.
VCFRONT_a141_coolantTempBatSns	The front vehicle controller (VCFRONT) detects the battery coolant loop inlet temperature sensor is experiencing an electrical condition (short or disconnect).	The battery coolant loop inlet temperature sensor reads a power rail or ground reference voltage.	Powertrain performance may be limited.
VCFRONT_a142_exvMotorFault	The front vehicle controller (VCFRONT) detects the chiller electronic expansion valve (EXV) motor driver is experiencing an electrical condition (short or disconnect).	The chiller EXV motor driver is experiencing an electrical condition (short or disconnect).	Cabin climate control system air conditioning may be limited or unavailable. Powertrain performance may be limited.
VCFRONT_a146_pumpBatSoftStall	The vehicle controller detects the battery pump motor is unable to reach the target RPM, which may prevent the battery pump from running as expected.	The battery pump motor is unable to reach the target RPM.	Powertrain performance may be limited.
VCFRONT_a136_refrigDischTempSns	The front vehicle controller (VCFRONT) detects the refrigerant discharge temperature sensor is experiencing an electrical condition (short or disconnect).	The refrigerant discharge temperature sensor reads a power rail or ground reference voltage.	Cabin climate control system air conditioning may be limited or unavailable. Powertrain performance may be limited.
VCFRONT_a135_coolantLevelLow	The front vehicle controller (VCFRONT) detects the coolant level sensor is reporting a low coolant level or is experiencing an electrical condition (short or disconnect).	The coolant level sensor reports low coolant or is experiencing an electrical condition (short or disconnect).	Cabin climate control system air conditioning may be limited or unavailable. Powertrain performance may be limited.
VCFRONT_a137_refrigDischPresSns	The front vehicle controller (VCFRONT) detects the refrigerant discharge pressure sensor is experiencing an electrical condition (short or disconnect).	The refrigerant discharge pressure sensor reads a power rail or ground reference voltage.	Cabin climate control system air conditioning may be limited or unavailable. Powertrain performance may be limited.
VCFRONT_a133_espEFuseTrip	The front vehicle controller (VCFRONT) has opened the low voltage (LV) power feed circuit (eFuse) to the electronic stability control (ESP), interrupting power supply to the ESP.	VCFRONT detects the eFuse circuit gating low voltage (LV) power feed to ESP as open (tripped).	Vehicle stability control may be limited.

VCFRONT_a156_louverBlockage

The vehicle controller detects the front louver, or active grill shutter (AGS), is reporting a blockage.

The front louver does not pass the calibration range check after 5 calibration cycles due to under-travel.

Cabin climate control system air conditioning may be limited or unavailable. Powertrain performance may be limited.

VCFRONT_a157_louverBreakage

The vehicle controller detects the front louver, or active grill shutter (AGS), is unable to calibrate and traveled farther than the expected range without reaching the end stop, indicating the front louver may be damaged.

The front louver does not pass the calibration range check after 5 calibration cycles due to over-travel.

Cabin climate control system air conditioning may be limited or unavailable. Powertrain performance may be limited.

VCFRONT_a162_compressorInhibitedContext

Refrigerant compressor operation is inhibited. Cabin cooling (air conditioning) will be disabled. Powertrain performance may be limited. Other alerts relevant to the specific condition should be present, including refrigDischg (refrigerant discharge), refrigSuct (refrigerant suction), exvMotor (chiller EXV motor), evapSolenoid (evaporator solenoid), or thmlFan (thermal fan) alerts.

A condition affecting refrigerant system hardware is detected, the refrigerant compressor has an internal condition affecting performance, or other abnormal refrigerant system conditions are detected.

Cabin cooling (air conditioning) will be disabled. Powertrain performance may be limited.

VCFRONT_a150_pumpChillerLowRPMCBang

The vehicle controller detects the chiller pump motor is unable to reach the target RPM, which may prevent the chiller pump from running as expected.

The chiller pump motor is unable to reach the target RPM.

Powertrain performance may be limited.

VCFRONT_a151_pumpPtLowRPMCBang

The vehicle controller detects the powertrain pump motor is unable to reach the target RPM, which may prevent the powertrain pump from running as expected.

The powertrain pump motor is unable to reach the target RPM.

Powertrain performance may be limited.

VCFRONT_a164_eFuseLckoutMissing

The front vehicle controller (VCFRONT) detects the voltage on the lockout circuit is not high enough when the right vehicle controller (VCRIGHT) reports the lockout circuit active, indicating the eFuse lockout is not successfully asserted.

VCFRONT detects the voltage on the lockout circuit is not measured at 5V over 2 seconds when VCRIGHT reports that the lockout circuit is active.

No functionality should be directly affected when eFuse lockout is missing. However, one or more eFuses may toggle between enabled / not enabled states if the VCFRONT is reset and its non-volatile random access memory (NVRAM) does not function as expected. Note: VCFRONT should not attempt to toggle eFuses via the enable line when lockout is asserted, even after a reset.

VCFRONT_a152_thmlFanLowRPMCBang

The vehicle controller detects the thermal fan motor is unable to reach the target RPM, which may prevent the thermal fan from running as expected.

The thermal fan motor is unable to reach the target RPM.

Cabin climate control system air conditioning may be limited or unavailable. Powertrain performance may be limited.

VCFRONT_a166_rightHCMMIA

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

The vehicle controller does not receive one or more of the expected messages from the right headlamp controller within the expected time frame over the local interconnect network (LIN).

The right headlamp may be unavailable or may not function as expected.

VCFRONT_a143_pumpChillerICTransFault

The front vehicle controller (VCFRONT) detects the LV8907 integrated circuit on the chiller pump motor issued a circuit warning, which may prevent the chiller pump from running as expected.

The LV8907 integrated circuit on the on the chiller pump motor issues a circuit warning that prevents the motor controller from driving the motor.

Powertrain performance may be limited.

VCFRONT_a144_pumpPtICTransFault

The front vehicle controller (VCFRONT) detects the LV8907 integrated circuit on the powertrain pump motor issued a circuit warning, which may prevent the powertrain pump from running as expected.

The LV8907 integrated circuit on the on the powertrain pump motor issues a circuit warning that prevents the motor controller from driving the motor.

Powertrain performance may be limited.

VCFRONT_a145_thmlFanICTransFault

The vehicle controller detects the LV8907 integrated circuit on the thermal fan motor issued a circuit warning, which may prevent the thermal fan from running as expected.

The LV8907 integrated circuit on the thermal fan motor issues a circuit warning that prevents the motor controller from driving the motor.

Cabin climate control system air conditioning may be limited or unavailable. Powertrain performance may be limited.

VCFRONT_a143_pumpBatICTransFault

The vehicle controller detects the LV8907 integrated circuit on the battery pump motor issued a circuit warning, which may prevent the battery pump from running as expected.

The LV8907 integrated circuit on the on the battery pump motor issues a circuit warning that prevents the motor controller from driving the motor.

Powertrain performance may be limited.

VCFRONT_a140_coolantTempPtSns

The front vehicle controller (VCFRONT) detects the powertrain coolant loop inlet temperature sensor is experiencing an electrical condition (short or disconnect).

The powertrain coolant loop inlet temperature sensor reads a power rail or ground reference voltage.

Powertrain performance may be limited.

VCFRONT_a141_coolantTempBatSns

The front vehicle controller (VCFRONT) detects the battery coolant loop inlet temperature sensor is experiencing an electrical condition (short or disconnect).

The battery coolant loop inlet temperature sensor reads a power rail or ground reference voltage.

Powertrain performance may be limited.

VCFRONT_a142_exvMotorFault

The front vehicle controller (VCFRONT) detects the chiller electronic expansion valve (EXV) motor driver is experiencing an electrical condition (short or disconnect).

The chiller EXV motor driver is experiencing an electrical condition (short or disconnect).

Cabin climate control system air conditioning may be limited or unavailable. Powertrain performance may be limited.

VCFRONT_a146_pumpBatSoftStall

The vehicle controller detects the battery pump motor is unable to reach the target RPM, which may prevent the battery pump from running as expected.

The battery pump motor is unable to reach the target RPM.

Powertrain performance may be limited.

VCFRONT_a136_refrigDischTempSns

The front vehicle controller (VCFRONT) detects the refrigerant discharge temperature sensor is experiencing an electrical condition (short or disconnect).

The refrigerant discharge temperature sensor reads a power rail or ground reference voltage.

Cabin climate control system air conditioning may be limited or unavailable. Powertrain performance may be limited.

VCFRONT_a135_coolantLevelLow

The front vehicle controller (VCFRONT) detects the coolant level sensor is reporting a low coolant level or is experiencing an electrical condition (short or disconnect).

The coolant level sensor reports low coolant or is experiencing an electrical condition (short or disconnect).

Cabin climate control system air conditioning may be limited or unavailable. Powertrain performance may be limited.

VCFRONT_a137_refrigDischPresSns

The front vehicle controller (VCFRONT) detects the refrigerant discharge pressure sensor is experiencing an electrical condition (short or disconnect).

The refrigerant discharge pressure sensor reads a power rail or ground reference voltage.

Cabin climate control system air conditioning may be limited or unavailable. Powertrain performance may be limited.

VCFRONT_a133_espEFuseTrip

The front vehicle controller (VCFRONT) has opened the low voltage (LV) power feed circuit (eFuse) to the electronic stability control (ESP), interrupting power supply to the ESP.

VCFRONT detects the eFuse circuit gating low voltage (LV) power feed to ESP as open (tripped).

Vehicle stability control may be limited.

Alerts

Alerts