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P0A78-505, P0A78-506 HBC-281 < COMPONENT DIAGNOSIS > D E F G H I J K L M A B HBC N O P Diagnosis Procedure INFOID:0000000004211941 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. CHECK DTC OUTPUT (HYBRID SYSTEM) 1. Turn ignition switch ON. 2. Check DTC. NOTE: P0A78-505 or 506 may be set due to a malfunction which also causes DTCs in the table above to be set. In this case, first troubleshoot the output DTCs in the table above. Then, perform a test to attempt to reproduce the problems, and check that no DTCs are output. Is DTC detected? YES >> Go to Diagnosis Procedure relevant to output DTC. NO >> GO TO 3. 3. CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CON- NECTOR) DTC No. INF code Trouble diagnosis name DTC detecting condition Possible cause P0A78 505 Drive Motor “A” Inverter Motor inverter fail signal detection • Wire harness or connector 506 Motor inverter fail signal detection • Wire harness or connector DTC No. Relevant Diagnosis P0A1D (Except INF code 390) Hybrid Powertrain Control Module P0A1A (all INF codes) Generator Control Module P0A1B (all INF codes) Drive Motor “A” Control Module P0A72 (all INF codes) Generator Phase V Current P0A75 (all INF codes) Generator Phase W Current P0A60 (all INF codes) Drive Motor “A” Phase V Current P0A63 (all INF codes) Drive Motor “A” Phase W Current P0A4B-253 Generator Position Sensor Circuit P0A4D-255 Generator Position Sensor Circuit Low P0A4C-513 Generator Position Sensor Circuit Range / Performance P0A3F-243 Drive Motor “A” Position Sensor Circuit P0A41-245 Drive Motor “A” Position Sensor Circuit Low P0A40-500 Drive Motor “A” Position Sensor Circuit Range / Performance P0A78-266, 267, 523, 586 Drive Motor “A” Inverter Performance P0A94-585, 587, 589, 590 DC/DC Converter Performance |