Power & Ground Circuits

For testing of Engine Control Module (ECM) power and ground circuits, see ENGINE CONTROL MODULE (ECM) POWER SOURCE CIRCUIT . Also see PIN VOLTAGE CHARTS article. For illustration of ECM location, see THEORY & OPERATION article. Use illustration for identification of ECM electrical connector terminals. See Fig 1-Fig 10 .

Fig 1: Identifying Engine Control Module (ECM) Electrical Connector Terminals (Camry CNG Models)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Identifying Engine Control Module (ECM) Electrical Connector Terminals (Camry Gasoline Models & Camry Solara)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 3: Identifying Engine Control Module (ECM) Electrical Connector Terminals (Celica)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 4: Identifying Engine Control Module (ECM) Electrical Connector Terminals (Corolla With 3-Speed A/T Or M/T, & RAV4)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 5: Identifying Engine Control Module (ECM) Electrical Connector Terminals (Corolla With 4-Speed A/T)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 7: Identifying Engine Control Module (ECM) Electrical Connector Terminals (Tacoma Calif. Emission Vehicles)

Fig 8: Identifying Engine Control Module (ECM) Electrical Connector Terminals (Tacoma Except Calif. Emission Vehicles)

Fig 9: Identifying Engine Control Module (ECM) Electrical Connector Terminals (4Runner Calif. Emission Vehicles)

Fig 10: Identifying Engine Control Module (ECM) Electrical Connector Terminals (4Runner Except Calif. Emission Vehicles)