Ford Corsar Repair Manual page 468

TROUBLE-SHOOTING AND DIAGNOSES
r.-Gzq
LOCK-UP ELECTRICAL CONTROL
The lock-up torque converter function is controlled by the E.C.C.S.
control unit and governor pressure (vehicle speed).
A lock-up solenoid, located in a line pressure drain is switched "ON"
or "OFF". When the solenoid is "ON", the drain is open, and lock-up
is disabled. When solenoid is "OFF", the drain is closed, and lock-up
is enabled.
The E.C.C.S. control unit will switch the lock-up solenoid according
to the table below.
The circuit from the ECM is shown below. For testing of the ECM input
sensors, refer Section ES.
E.C.M.
37
AR 15
Lock
UP
solenoid
Operating Parameters
Lock-up
Solenoid
ON
ON
OFF
Water Temp.
Less than
50'C
Above
50'C
Lock-up Operation
(Vehicle Speed above
approx. 70-75 kph)
OFF
OFF
ON
A
Throttle Position
Idle
Above Idle
Idle
Above Idle