Ford Corsar Repair Manual page 265

E.C.C.S. SYSTEM DESCRIPTION
p % q
Fuel Pump Control
INPUTIOUTPUT SIGNAL LINE
SYSTEM DESCRIPTION
The E.C.U. activates the fuel pump for several
seconds after the ignition switch is turned on to
improve engine startability. If the E.C.U. receives
a 1" signal from the crank angle sensor, it knows
that the engine is rotating, and causes the pump
to perform. If the 1" signal is not received when
the ignition switch is on, the engine stalls. The
E.C.U. stops pump operation and prevents battery
discharging, thereby improving safety. The E.C.U.
does not directly drive the fuel pump. It controls
the ONIOFF fuel pump relay, which in turn con-
trols the fuel pump.
.
Fuel pump relay
Engine speed
E.C.C.S.
control
unit
-
Condition
Ignition switch is turned to
ON.
Engine running and cranking
When engine is stopped
Except as shown above
Fuel pump operation
Operates for
5 seconds
Operates
Stops in 1 second
Stops