Corolla Wagon L4-107.5 1762cc 1.8L DOHC (7A-FE) (1993)
EFI Main Relay: Testing and Inspection
Back-Up Power Source
Battery positive voltage is supplied to terminal BATT of the ECM even when the ignition switch is off for use by the diagnostic trouble code memory
and air-fuel ratio adaptive control value memory, etc.
Diagnostic Chart
Circuit Diagram