Ford Corsar Repair Manual page 214

TROUBLE DIAGNOSES
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CA20E
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DIAGNOSTIC PROCEDURE 8
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TORQUE CONVERTER LOCK-UP RELEASE SOLENOID. (AIT MODELS ONLY).
Note: If codes 14, 21, 22 or 55 are displayed, attend to them first.
Run engine and bring to
normal operating
temperature.
With no accelerator
applied measure ECU
pin 37.
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Less than 2 volts.
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More than 2 volts.
:
1
Check for 12 volts supply
l l
Check lock-up solenoid
to lock-up solenoid.
for connection to 12 volts.
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Apply accelerator to run
1 l
Check solenoid for shorted
the engine at 2000 rpm.
winding and replace if faulty.
1
Check for short
circuit on AR15.
Check AR15 for short circuit
to 12 volts
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Replace lock-up solenoid.
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Measure the voltage at ECU
pin 37.
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Check AR15 and repair if
necessary.
If all the above ok, unplug connector.
If pin 37 still measures more than
Check solenoid for open
circuit and replace
solenoid if necessary.
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2 volts replace ECM.
More than 8 volts.
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If all above are ok then
replace ECM.
LOCK UP CONVERTER SOLENOID