Tesla EFUSE Alert Codes

Tesla warning code in the Electronic Fuse (EFUSE) module related to watchdog reset.

Tesla warning code in the Electronic Fuse (EFUSE) module. The external 12V supply voltage from the vehicle is out of range. This alert sets when the measured voltage is detected to be below 7.31V, which indicates a power loss event. The alert is not set during an electronic control unit (ECU) reset. Once it is set, the alert is cleared when the voltage detected is above 7.31V. This alert is usually accompanied with other 12V alerts, indicating a generic 12V under voltage or sudden power loss.

Tesla warning code in the Electronic Fuse (EFUSE) module. The EFUSE Modeule CPU detected a reset, which can potentially result in a EFUSE missing (MIA) condition being set for some time.

Tesla warning code in the Electronic Fuse (EFUSE) module related to alert manager fault.

Tesla warning code in the Electronic Fuse (EFUSE) module related to nvmm alert.

Tesla warning code in the Electronic Fuse (EFUSE) module related to task scheduler error.

Tesla warning code in the Electronic Fuse (EFUSE) module related to task init error.

Tesla warning code in the Electronic Fuse (EFUSE) module related to high cpu load.

Tesla warning code in the Electronic Fuse (EFUSE) module related to high stack usage.

Tesla warning code in the Electronic Fuse (EFUSE) module related to task1ms error.

Tesla warning code in the Electronic Fuse (EFUSE) module related to task10ms error.

Tesla warning code in the Electronic Fuse (EFUSE) module related to task100ms error.

Tesla warning code in the Electronic Fuse (EFUSE) module related to task1000ms error.

Tesla warning code in the Electronic Fuse (EFUSE) module related to input resistance high.

Tesla warning code in the Electronic Fuse (EFUSE) module related to engineering build.

Tesla warning code in the Electronic Fuse (EFUSE) module related to xcp connected.

Tesla warning code in the Electronic Fuse (EFUSE) module related to xcp was connected.

Tesla warning code in the Electronic Fuse (EFUSE) module related to switch fault.

Tesla warning code in the Electronic Fuse (EFUSE) module. This alert will trigger when the vbat-fused high current E-fuse upstream of the air compressor E-fuse internal to the E-fuse module is faulted as seen by the E-fuse electronic control unit (ECU). This can occur if an unexpectedly high inrush current into the air compressor or a short circuit event has occurred at the air compressor output of the E-fuse. Another possibility is that a long current event, which exceeds the current carrying capability of the cable, has occurred. Once the E-fuse is tripped (turned off), the air compressor will measure ~0V.?

Tesla warning code in the Electronic Fuse (EFUSE) module. This alert will trigger when the DCDC E-fuse output (input into the 12V system) is faulted as seen by the E-fuse electronic control unit (ECU). This can occur if an unexpectedly high inrush current into the DCDC module or a short circuit event has occurred at the output of the E-fuse. Once the E-fuse is tripped (turned off), the Electronic Stability Program (ESP) Motor will measure ~0V when it is loaded or ~2V when there is an open circuit for the -D and -E Top Level Assemblies (TLAs). For -F and beyond TLAs, the open circuit voltage is 9.8V. ?

Tesla warning code in the Electronic Fuse (EFUSE) module. This alert should not occur since there are no frunk E-fuses in the E-fuse module. Instead, jumpers are used to pass through the module.

Tesla warning code in the Electronic Fuse (EFUSE) module. This alert will raise when the EPAS1 E-fuse output is faulted as seen by the E-fuse electronic control unit (ECU). This can occur if an unexpectedly high inrush current into the EPAS1 (primary) module or a short circuit event has occurred at the output of the E-fuse. Another possibility is that a long current event, which exceeds the current carrying capability of the cable, has occurred. Once the E-fuse is tripped (turned off), the EPAS1 will measure ~0V when it s loaded or ~9.8V when there is an open circuit.?

Tesla warning code in the Electronic Fuse (EFUSE) module. This alert will trigger when the EPAS2 E-fuse output is faulted as seen by the E-fuse electronic control unit (ECU). This can occur if an unexpectedly high inrush current out of the EPAS2 feed or a short circuit event has occurred at the output of the E-fuse. Another possibility is that a long current event, which exceeds the current carrying capability of the cable, has occurred. Once the E-fuse is tripped (turned off), the EPAS1 will measure ~0V when it is loaded or ~9.8V when there is an open circuit. The EPAS2 E-fuse output in Model X vehicles are responsible for all of the following loads. EPAS2 (secondary).Falcon Doors.2nd and 3rd row seats.All other loads on the Auxiliary Fuse Box. For Model S vehicles, only EPAS2 is connected to this output. Any short circuit or inrush condition on the above feeds may cause this E-fuse to trip. ?

Tesla warning code in the Electronic Fuse (EFUSE) module related to cabin bece fuse trip.

Tesla warning code in the Electronic Fuse (EFUSE) module. This alert will raise when the Electronic Stability Program (ESP) Motor E-fuse output is faulted as seen by the E-fuse electronic control unit (ECU). This can occur if an unexpectedly high inrush current into the ESP Motor module or a short circuit event has occurred at the output of the E-fuse. Another possibility is that a long current event, which exceeds the current carrying capability of the cable, has occurred. Once the E-fuse is tripped (turned off), the ESP Motor will measure ~0V when it is loaded or ~2V when there is an open circuit.?

Tesla warning code in the Electronic Fuse (EFUSE) module. This alert will raise when the iBooster channel is faulted as seen by the E-fuse electronic control unit (ECU). This can occur if an unexpectedly high inrush current into the iBooster or a short circuit event has occurred at the iBooster output of the E-fuse. Another possibility is that a long current event, which exceeds the current carrying capability of the cable, has occurred. Once the E-fuse is tripped (turned off), the output will measure ~0V if it is loaded or ~?9.6-10.6V if there is an open circuit.

Tesla warning code in the Electronic Fuse (EFUSE) module. This alert will trip on whenever the HVAC rail is turned off. This is expected and should be ignored, shall be fixed in future versions of firmware. This alert will raise when the condenser fan channel is faulted as seen by the E-fuse electronic control unit (ECU). This can occur if an unexpectedly high inrush current into the condenser fan or a short circuit event has occurred at the condenser fan output of the E-fuse. Another possibility is that a long current event, which exceeds the current carrying capability of the cable, has occurred. Once the E-fuse is tripped (turned off), the output will measure ~0V.

Tesla warning code in the Electronic Fuse (EFUSE) module related to loadshed event.

Tesla warning code in the Electronic Fuse (EFUSE) module. This alert is for data collection purposes only until hands-off driving is enabled.

Tesla warning code in the Electronic Fuse (EFUSE) module related to dcdc self test fail.

Tesla warning code in the Electronic Fuse (EFUSE) module. This alert is for data collection purposes only.

Tesla warning code in the Electronic Fuse (EFUSE) module. The power steering can only be disabled due to the presence of "E-fuse self-tests" upon vehicle wake-up. If either the Electric Power Assist Steering (EPAS) primary or EPAS secondary fault at wake-up, there will be no assistance from the start. Sleeping and waking the vehicle will force a re-test, which will pass the next time if the conditions that caused the initial failure are not present. If the failure occurred during the drive itself, it is less likely to be E-fuse related. Once driving is underway with a working EPAS, the E-fuse software state is locked out for safety reasons and only the hardware sensing can make it trip. Both the EPAS circuits would have needed to trip their E-fuse during the journey for this to be the case.?

Tesla warning code in the Electronic Fuse (EFUSE) module. The power steering can only be disabled due to the present of "E-fuse self-tests" upon vehicle wake-up. If either the Electric Power Assist Steering (EPAS) primary or EPAS secondary fault at wake-up, there will be no assistance from the start. Sleeping and waking the vehicle will force a re-test, which will pass the next time if the conditions that caused the initial failure are not present. If the failure occurred during the drive itself, it is less likely to be E-fuse related. Once driving is underway with a working EPAS, the E-fuse software state is locked out for safety reasons and only the hardware sensing can make it trip. Both the EPAS circuits would have needed to trip their E-fuse during the journey for this to be the case.?

Tesla warning code in the Electronic Fuse (EFUSE) module related to cabin bec self test fail.

Tesla warning code in the Electronic Fuse (EFUSE) module. This alert is for data collection purposes only.

Tesla warning code in the Electronic Fuse (EFUSE) module. This alert is used for data collection purposes only.

Tesla warning code in the Electronic Fuse (EFUSE) module. The E-Fuse reports that the condenser fan self-test has failed due to a fault condition. This alert should be used for informational purposes only as self-tests are prone to false positives.

Tesla warning code in the Electronic Fuse (EFUSE) module. This alert is set when the current measured through the Frunk Bussed Electrical Center (BEC) channel has exceeded the harness inline fuse rating. The harness inline fuse may be damaged if this alert has been set.

Tesla warning code in the Electronic Fuse (EFUSE) module related to cabin over current.

Tesla warning code in the Electronic Fuse (EFUSE) module related to i2c fault.

Tesla warning code in the Electronic Fuse (EFUSE) module related to air comp driver fault.

Tesla warning code in the Electronic Fuse (EFUSE) module related to rev batt e fuse trip.

Tesla warning code in the Electronic Fuse (EFUSE) module related to rev batt retry.

Tesla warning code in the Electronic Fuse (EFUSE) module. The temperature sensor for the 12V battery is disconnected from the E-fuse and reporting open circuit on the harness. This will result in a default voltage set-point being used for charging the 12V battery, which will not be optimized for the present temperature. As a result, it is likely the 12V battery life will be reduced.

Tesla warning code in the Electronic Fuse (EFUSE) module. The temperature sensor for the 12V battery from the E-fuse is shorted. This will result in a default voltage set-point being used for charging the 12V battery, which will not be optimized for the present temperature. As a result, it is likely the 12V battery life will be reduced.

Tesla warning code in the Electronic Fuse (EFUSE) module related to voltage out of spec.

Tesla warning code in the Electronic Fuse (EFUSE) module related to air comp output stuck on.

Tesla warning code in the Electronic Fuse (EFUSE) module. This alert is intended to show that the 12V battery was connected in reverse-polarity (negative post to positive harness and vice-versa) but can trigger during normal operation, which is not expected and is currently being investigated. For now, this alert can be ignored. This alert triggered if the reverse battery E-fuse is tripped. It is sometimes triggered along with EFUSE_w148_cabinOverCurrent and EFUSE_w147_frunkOverCurrent as well.