Genie GS-3384 Service Manual page 183

September 2005
REV A
Code Problem
Engine Coolant Temperature
43
(ECT) sensor low voltage.
Intake Air Temperature (IAT)
45
sensor low voltage.
51
Low oil pressure.
Crankshaft Position (CKP)
52
sensor senses extra or
missing pulses.
Camshaft Position (CMP)
53
sensor senses unknown
pattern.
ECM Fault - Illegal
54
Operation.
55
ECM - Illegal Interruption.
ECM - Computer Operating
56
Properly (COP) failure.
61
System voltage low.
62
System voltage high.
Part No. 82259
Cause
ECM detects a excessively low signal voltage
from the ECT sensor.
ECM detects a excessively low signal voltage
from the IAT sensor.
Bad oil pressure switch, wires shorted to
ground or not enough engine oil.
The CKP and CMP sensors work together; if
one is bad, the other one won't work correctly
and causes the ECM to detect a fault. The
ECM uses the signal pulses from the CKP
and CMP sensors to initiate sequential fuel
injection.
The CMP and CKP sensors work together; if
one is bad, the other one won't work correctly
and causes the ECM to detect a fault. The
ECM uses the signal pulses from the CKP
and CMP sensors to initiate sequential fuel
injection.
The ECM received an illegal instruction signal
from one or more of the sensors and has
gone into a default program and then return
to normal operation.
The ECM received an illegal interruption
signal from one or more engine sensors and
has gone into a default program and then
return to normal operation.
Under normal operation the ECM will store
numbers into memory. If this does not
happen, it will reset itself and set fault code
56.
Battery supply voltage to the ECM is 8V DC
or less.
Battery supply voltage to the ECM is 18V DC
or more.
GS-3384
Section 5 • Fault Codes
FORD ENGINE ECM FAULT CODE CHART
(BEFORE SERIAL NUMBER GS8404-40302)
Check engine coolant level OR check for
shorted wires or poor terminal connections
from the ECT sensor to the ECM OR
replace the ECT sensor.
The IAT sensor shares the same ground
wire as the ECT and MAP sensors. Check
for shorted wires or poor terminal
connections from the IAT sensor to the
ECT and MAP sensors to the ECM OR
replace the IAT sensor.
Check engine oil level OR check for
shorted wires or poor terminal connections
from the oil pressure switch to the ECM
OR replace the oil pressure switch.
Check for shorted wires or poor terminal
connections from the CKP and CMP
sensors to the ECM OR replace the CKP
or CMP sensor.
Check for shorted wires or poor terminal
connections from the CKP and CMP
sensors to the ECM OR replace the CKP
or CMP sensor.
Replace the ECM.
Replace the ECM.
Replace the ECM.
Check battery and/or alternator condition
OR check for shorted wires or poor
terminal connections from the battery to
the ECM.
Check battery and/or alternator condition
OR check for shorted wires or poor
terminal connections from the battery to
the ECM.
Solution
5 - 9