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P0A1D-144, P0A1D-145 HBC-185 < COMPONENT DIAGNOSIS > D E F G H I J K L M A B HBC N O P P0A1D-144, P0A1D-145 Description INFOID:0000000004211840 The hybrid vehicle control ECU monitors its internal operation and detects malfunctions. DTC Logic INFOID:0000000004211841 DTC DETECTION LOGIC The hybrid vehicle control ECU performs many diagnostic tests to verify proper operation of internal ECU sys- tems. In one of these diagnostics, the hybrid vehicle control ECU performs a self-test. If the hybrid vehicle con- trol ECU detects an internal problem during this self-test, it will conclude that there is an internal malfunction. The hybrid vehicle control ECU will illuminate the MIL and set a DTC. Diagnosis Procedure INFOID:0000000004211842 1. PRECONDITIONING • Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system. • After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. • Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly. >> GO TO 2. 2. REPLACE HYBRID VEHICLE CONTROL ECU HBC-644, "Removal and Installation" >> COMPLETED DTC No. INF code Trouble diagnosis name DTC detecting condition Possible cause P0A1D 144 Hybrid Powertrain Control Module ECU internal error Hybrid vehicle control ECU 145 |