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Home >> Lexus >> 2008 >> RX 400h AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 158 (Hybrid Vehicle Control (P310) - RX400H - DTC P0336-137 Through P0A32-666) >> DTC P0A1D-139 Hybrid Powertrain Control Module >> Monitor Description

Monitor Description

WARNING: This page is about a different car, the 2006 Lexus RX 400h. However, it is still accessible from the selected car via links, so may be relevant.

The HV control ECU performs diagnostic monitoring to verify proper operation of vehicle systems. The inside of the HV control ECU is checked by one of these monitors for a bad integrated circuit which actuates a relay. If the HV control ECU detects a malfunction, it will illuminate the MIL and set a DTC.

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