Celica Coupe L4-132 2164cc 2.2L DOHC (5S-FE) (1992)
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EFI Main Relay: Description and Operation
ECU Power Supply
PURPOSE
The Electronic Fuel Injection Main Relay provides voltage to terminals +B and +B1 of the ECU when the ignition switch is turned on.
OPERATION
Battery voltage is supplied to the BATT terminal of the ECU at all times. The EFI fuse (15A) supplies continuous battery voltage to the EFI Main
Relay. System battery voltage must be at least 10 volts in order to operate EFI and ECU functions.
