Ford Corsar Repair Manual page 181

E.C.C.S. DESCRIPTION
ldle Speed Control
The idle speed is controlled by the E.C.M., corresponding to the
engine operating conditions. Th'e E.C.C.S. control senses the engine
condition and determines the best idle speed at each water tempera-
ture. The E.C.M. then sends a series of pulses, corresponding t o the
difference between the best idle speed and the actual idle speed, to
the I.A.C. valve.
Torque Converter Lock-Up Control
Distributor (Hall effect sensor)
Engine speed
b
Water temperature sensor
Engine temperature
b
E.C.M.
-
Ignition switch
Torque converter lock-up is only available in 4th gear above
approximately 70-75 kph (hydraulic pressure available). Torque
converter lock-up operation is then controlled by the E.C.M. turning
"OFF" the lock-up solenoid to engage torque converter lock-up as
follows:
Idle air control valve
Start signal
b
Throttle valve idle position
Throttle position switch
b
b
E.C.M.
Water temperature sensor
-
Air conditioner switch (where fitted)
Vehicle speed sensor
Throttle position sensor
b
Torque Converter
Lock-up solenoid
Lock-up Operation
(Vehicle Speed above
approx. 70-75 kph)
OFF
OFF
ON
Air conditioner operation
b
Vehicle speed
,
Lock-up
Solenoid
ON
ON
OFF
Water Temp.
Less than
50°C
Above
50°C
Throttle Position
Idle
Above Idle
Idle
Above Idle