Model Y

EPASTS_a264 — Assist Torque Limited

Full alert identifier: EPASTS_a264_assistTorqueLimited

Alert description

This alert is reported by the MotorRestrictionMonitor_T222 (MRM) component when Internal faults/errors are preventing EPAS to produce its full torque capability. This alert is reported when the power ratio (actual power divided by nominal power) is less than 60% [Calibratable].

Potential impact

EPAS assist torque is limited.

Set condition

EPAS power ratio (actual power divided by nominal power) is less than 60% [Calibratable].

Clear condition

EPAS power ratio (actual power divided by nominal power) is greater than 70% [Calibratable].

Signals to check

Open this alert in Service Mode Plus and review the Payload tab. Use the field names below to identify the values shown by your vehicle.

Signal	Unit
Power Ratio `EPASTS_a264_powerRatio`	percent
Vehicle Speed `EPASTS_a264_vehicleSpeed`	kph

Signal	Unit
Degraded ECU `EPASTS_a264_degradedECU` 0 NONE 1 OWN ECU SIDE 2 OTHER ECU SIDE 3 BOTH ECU SIDES	—
Other Side Degradation Reason `EPASTS_a264_otherSideDegradationReason`	—
Own Side Degradation Reason `EPASTS_a264_ownSideDegradationReason`	—

Check other alerts

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of EPASTS_a264.