Model Y

EPASTP_a001 — Adc Calibration Or Init Fail

Full alert identifier: EPASTP_a001_adcCalibrationOrInitFail

Alert description

This alert is reported by the ADCDriverCD_TC3x component when Analog-Digital Converter (ADC) calibration cannot be started, timeout reached. MCU failure.

Potential impact

EPAS full loss of assist. EPAS ADC is considered inoperable.

Set condition

EPAS uC peripheral ADC self calibration timeout at startup.

Clear condition

Perform EPAS ECU power cycle.

Signals to check

These diagnostic fields are associated with EPASTP_a001. Check the alert's Payload in Service Mode Plus for available values.

Signal	Unit
Debug Info `EPASTP_a001_debugInfo`	—

Check other alerts

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of EPASTP_a001.

EPASTP_a205 — Fdr Ocl Fail EPASTP_a205_fdrOclFail This alert is reported by the Output Control Logic (OCL) of the FdrDetectionManager_R12 (FDR) component when the necessary signals for freezing and retention detection are not available.
EPASTP_a054 — Adc Unexpected Data EPASTP_a054_adcUnexpectedData This alert is reported by the ADCDriverCD_TC3x component when there is an ADC (analog-digital converter) failure, MCU failure.
EPASTP_a084 — Adc Trigger Check EPASTP_a084_adcTriggerCheck This alert is reported when there is a ADC failure, MCU failure.
EPASTP_a187 — Epm Volt Fail EPASTP_a187_epmVoltFail This alert is reported by the ExternalPowerManager_A8140x (EPM) component in case of Undervoltage and Overvoltage on the V5P1 (TSU) and V5A (Communication) supplies. This diagnostics is used for root cause detection.
EPASTP_a002 — Adc Mux Err EPASTP_a002_adcMuxErr This alert is reported by the ADCDriverCD_TC3x component when Analog-Digital Converter (ADC) multiplexer testing failed, the root cause also can be reference problems or short-to-GND/short-to-supply type pin errors.

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