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Home >> Toyota >> 2004 >> Matrix Base, FWD, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 532 (Hybrid Control System - Diagnosis) >> DTC P0A1D/141: Hybrid Powertrain Control Module >> Monitor Description
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Monitor Description

WARNING: This page is about a different car, the 2004 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.

The HV control ECU performs many diagnostic tests to verify proper operation of internal ECU systems. One of these tests checks for errors in the ROM (Read Only Memory) circuits of the HV control ECU.

If the HV control ECU detects this malfunction inside of the ECU, it will illuminate the MIL and set a DTC.

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