Engine Control Module Power Source Circuit: Prius

WARNING: Read service precautions before proceeding with service procedure. See SERVICE PRECAUTIONS .

For engine control module power source circuit inspection, see Fig 1-Fig 6 . Before replacing ECM, check ECM connectors and ground circuits. See ENGINE CONTROL MODULE POWER & GROUND CIRCUITS .

Fig 1: Engine Control Module Power Source Circuit Description & Diagram (Prius)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Engine Control Module Power Source Circuit Inspection - Steps 1-3 (Prius)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 3: Engine Control Module Power Source Circuit Inspection - Steps 4-5 (Prius)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 4: Engine Control Module Power Source Circuit Inspection - Steps 6-8 (Prius)

Fig 5: Engine Control Module Power Source Circuit Inspection - Step 9 (Prius)

Fig 6: Identifying Engine Control Module Electrical Connector Terminals (Prius)