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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-143 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 many diagnostic tests to verify proper operation of internal ECU systems. Read and write values at the inside of the HV control ECU memory, are compared by one of these monitors, which have been indicated by the transponder key. If those two values are inconsistent with each other, the HV control ECU interprets this as an ECU memory failure of the HV control ECU. The HV control ECU illuminates the MIL and sets a DTC.

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