Engine Control Module Power Source Circuit: Highlander

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 (Highlander)

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

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Fig 3: Engine Control Module Power Source Circuit Inspection - Steps 4-6 (Highlander)

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Fig 4: Engine Control Module Power Source Circuit Inspection - Steps 7-9 (Highlander)

Fig 5: Engine Control Module Power Source Circuit Inspection - Steps 10-11 (Highlander)

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