Toyota Corolla (E120): Ecm power source circuit

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Setting the vehicle speed
1 Press the “ON-OFF” button to activate the cruise control. Cruise control indicator will come on. Press the button again to deactivate the cruise control. 2 Press the “ON-OFF” button to activate the cruise control. Cruise control indicator will come on. Press the button again to deac ...

Inspection procedure
1 Check fuse(ecu–ig) Remove the ecu–ig fuse from the instrument panel j/b.  check the continuity of the ecu–ig fuse. Ok: continuity 2 Inspect terminal voltage(b) Remove the cruise control ecu assy with connector still connected.  turn the ignition switch ...

Circuit description
The rear heated oxygen sensor is used to monitor oxygen concentration in the exhaust gas. For optimum catalytic converter operation, the air fuel mixture must be maintained near the ideal ”stoichiometric” ratio. The heated oxygen sensor output voltage changes suddenly in the vicinity of ...