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Home >> Toyota >> 2012 >> Prius Three >> Repair and Diagnosis (Single Page) >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Hybrid Control System (Except Plug-In)) (Diagnostic Codes (P0069-273 - P0A78-113)) >> Hybrid Control System >> DTC P0A1D-721: Hybrid Powertrain Control Module; DTC P0A1D-722: Hybrid Powertrain Control Module; DTC P0A1D-723: Hybrid Powertrain Control Module; DTC P0A1D-787: Hybrid Powertrain Control Module; DTC P0A1D-818: Hybrid Powertrain Control Module >> Monitor Description
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Monitor Description

The power management control ECU (HV CPU) performs many diagnostic tests to verify proper operation of internal ECU systems. In one of these tests, the power management control ECU (HV CPU) checks the result of the ECM self-test. If the power management control ECU (HV CPU) detects a "Fail" from the ECM self-test, it will conclude that there is an internal malfunction in the ECM. The power management control ECU (HV CPU) will illuminate the MIL and set a DTC.

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