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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/134: Hybrid Powertrain Control Module, DTC P0A1D/135 Hybrid Powertrain Control Module, DTC P0A1D/570 Hybrid Powertrain Control Module >> Monitor Description
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Monitor Description

The HV control ECU performs diagnostic monitoring to verify proper operation of vehicle systems. One of these monitors the rationality of internal analog (signal) to digital conversions. The HV control ECU monitors the internal A/D (Analog/Digital Converter) value. If there is an A/D malfunction, the HV control ECU will illuminate the MIL and set a DTC.