Ford Corsar Repair Manual page 228

TROUBLE DIAGNOSES
p i i i i i q
DIAGNOSTIC PROCEDURE 21
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CODE 43
-
VEHICLE SPEED SENSOR (VSS).
The vehicle speed sensor provides a square wave voltage
output varying from 0 to 12 volts.
Code 43 is always set when the ignition key is first turned on,
while in diagnostic mode, engine running.
The error is cleared when the vehicle speed exceeds (approx.)
5 kmlhr. While indiagnostic mode, engine running.
Ignition off, clear codes.
Connect diagnostic plug.
Start engine.
Drive vehicle and achieve a speed of at least 10 kmlhr.
Turn off engine and when engine stops, turn key
to on position.
Code 43
a
Connect a voltmeter across pins 8 and 35
of ECM. (8 is signal).
Put the car in neutral and observe the
voltage of the signal.
1
Roll the car forward one metre and
observe if the voltage changes.
(From 0-12 volts or 12 volts -0).
No Code
43
a
Check for poor electrical
I
Voltage Changes. Voltage does not Change.
I I
Check connector terminals 8 and
35
on ECM and connector.
Disconnect connector to speed sensor.
Probe across pins 8 and 35 of ECM with
voltmeter.
Approx.
12
V .
T
<
2 volts.
I
Go to
@
on following page.
Go to
@
on following page.
7:
ECM
HALL SENSOR
I
AF 178
,
SIGNAL
-
I
VEHICLE SPEED
I
O A G N O I C S INPUT