Ford Corsar Repair Manual page 184

E.C.C.S. DESCRIPTION
Control Unit Systems
Fail Safe System
The E.C.C.S. control unit incorporates a fail safe system which
allows it to substitute a preprogrammed value or utilize other sensor
information in place of the fail sensor/circuit. When this occurs, the
E.C.M. lamp will illuminate.
Throttle Position Sensor
If a fault occurs with the throttle sensor and/or its circuit, the control
unit will substitute a value equivalent to 2% of throttle opening.
Air Flow Meter
If a fault occurs with the air flow meter and/or its circuit, the control
unit will substitute the throttle sensor signal to indicate engine load.
Water Temperature Sensor
If a fault occurs with the water temperature and/or its sensor, the
control unit will substitute a value equivalent to engine operation of
90°C.
Main Processor Failure
The E.C.C.S. control unit incorporates a back-up processor (known
as the limp processor) for limited operation of the engine manage-
ment system should a malfunction of the main processor occur.
When in the fail safe mode and operating from the limp processor,
the following conditions will apply.
Air Conditioning System
(where fitted)
Torque converter lock-up
Radiator Fans Low speed
High speed
Injection system
Ignition System Intake side
Exhaust side
Fuel pump
Idle Speed Control
Air Flow Meter Burn-Off
Operational
Operational
OFF
ON
Operational
Operational
Disabled
Operational
Fixed at last operating position until
restart, then reset and fixed to
approximately 1000 rpm
Disabled