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Home >> Toyota >> 2004 >> Prius >> Repair and Diagnosis (Single Page) >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Hybrid Control System - Diagnosis >> DTC P0A1D/163: Hybrid Powertrain Control Module, DTC P0A1D/164 Hybrid Powertrain Control Module, DTC POA1D/511 Hybrid Powertrain Control Module, DTC P0A1P/512 Hybrid Powertrain Control Module >> Monitor Description
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Monitor Description

The HV control ECU performs diagnostic monitoring to verify proper operation of internal and external ECU systems. In one of these monitors, the HV control ECU monitors the power supply for the motor main CPU.

If the HV control ECU detects a failure in the power supply for the motor main CPU, it will illuminate the MIL and set a DTC.

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