Genie Z-45/25 Service Manual page 115

First Edition • Second Printing
Fault
Code
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 Interuption.
ECM - Computer
56 Operating Properly (COP)
failure
61 System voltage low.
62 System voltage high.
Part No. 52709
Problem
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.
Genie Z-45/25 & Genie Z-45/25J
Section 5 • Troubleshooting Flow Charts
Cause
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.
FAULT CODES
Solution
5 - 5