Ford Corsar Repair Manual page 213

TROUBLE DIAGNOSES
DIAGNOSTIC PROCEDURE 7
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RADIATOR FAN CONTROL
Note: If codes 14, 15 or 55 are displayed, attend to them first.
Ignition off.
Remove temperature sender connector.
Bridge the two sockets in the connector
(AN17 and AN20).
Both fans should come on at high speed
when the ignition is turned on.
Insert the diagnostic bridge.
Run the engine.
Switch ignition off and back on again
when engine stops.
High speed fans only should be
operating.
Check the fan relays both high and
low speed and replace if necessary.
Remove diagnostic
plug, reconnect
temperature
sender.
Check the wiring to 12 volts on the
relays, the wiring from relays to the
fans and from the fans to ground, and
repair if necessary.
Check AR05 and AR02 for open or short
circuits and repair if necessary.
Repair fault in
the high speed
fan circuit.
L
/
Check the fans operation and replace
if necessary.
I
If all the above are ok then
replace ECU.
Run the engine at 3000 rpm for 5 minutes or
until the water temperature reaches greater
than 95OC.
The low speed fans should come on.
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Check for
intermittent
fault.
Repair fault in the
Low speed fan
circuit.