Ford Corsar Repair Manual page 218

TROUBLE DIAGNOSES
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CA2OE
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DIAGNOSTIC PROCEDURE 12
-
CODE 14
-
WATER TEMPERATURE SENSOR (VOLTAGE LOW).
Note: This chart assumes coolant level is correct.
CODE 14 I S SET IF:
(1)
The WTS indicates the temp.
>
130 degrees Celcius.
AND
(2)
This condition exists for more than 25.5 seconds with the engine running.
lgnition "off", clear codes.
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Diagnostic bridge removed.
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Start warm engine and run for
1
minute, or until
the ECM light comes on.
1
lgnition "on': engine stopped bridge diagnostic
test terminal and note code.
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1
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ENGINE COOLANT SENSOR
Code
14
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27
ECM
No Code 14
Over 4 volts
43
AN 115
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DIAGNOSTICS INPUT
L _ -
"F
-
:
Under
4
volts
Coolant sensor
temp. to resistance values
(approximate).
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OHMS
146
188
247
444
1,191
1,716
2,523
5,860
9,307
15,258
Disconnect coolant sensor connector.
lgnition "on'', engine stopped.
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Clear codes, run engine for 2 minutes and recheck for codes.
ES-54
Problem is intermittent. If no other
codes were stored. Look for poor
electrical connection in WTS circuit.
Check resistance across coolant sensor
terminals. See table for approximate
temperature to sensor resistance values.
Check voltage between harness
connector terminals circuits AN17 and AN20.
Disconnect ECM connectors.
Check signal circuit AN17 for short to
circuit
AN20
or to chassis earth.
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If circuit
AN17
is ok, replace ECM.
Check for intermittent or
loose terminals in sensor
harness connector, or for the 2
terminals shorting together when
connected to the sensor
If ok, replace ECM.
Replace
Sensor.