TROUBLESHOOTING
Troubleshooting - 67
PTO (L)
The light indicates that power is being sent to the
PTO clutch relay. For the PTO output to function,
the operator must be on the seat.
If the PTO remote kit is installed and an attachment
such as the generator is connected, the TCM will
automatically enable the Remote PTO function. In
this mode the PTO switch on the generator replaces
the seat switch criteria for the PTO to function. The
parking brake must be engaged for the Remote
PTO to function.
The following engine commands are engine specifi c.
Engine +12V Run (M)
This output is specifi c for the engines on the 4500P,
4500Z, and 4500Y. This light indicates that power is
being sent to the engine control module in order for
the engine to run. For this light to operate, either the
operator must be sitting on the seat, or the parking
brake must be engaged and the forward/reverse con-
trol (SDLA) must be in the neutral position.
Engine Stop Ground (N)
This output is specifi c for the engine on the 4500K.
In order for this engine to run, the engine stop ground
must be open. To shut off this engine, the engine stop
ground must be closed.
This light indicates the engine stop ground is open,
allowing the engine to run.
Diesel Pre-Heat (O)
This output is specifi c for the diesel engine on the
4500Y. It controls the signal that activates and deacti-
vates the glow plugs.
If there is an electrical issue, perform the Operator Safety Interlock Systems test as the fi rst
step in troubleshooting the system.
Perform the following safety interlock tests daily. Before testing, park the power unit on a level surface, place
wheel chocks in front and back of wheels, and place the high/low range shift lever in the neutral position. After
testing is complete, place the high/low shift lever in either high or low range, set the parking brake, and remove
the wheel chocks.
Turn the ignition key to the run position. Tests 1 - 4 test the engine start function, tests 5 - 9 test the engine run
function, and tests 10 - 13 test the PTO function.
Engine
Start
Test
Number
Parking Brake
Engaged
Forward/Reverse Control
(SDLA) in Neutral
Operator Present in Seat Engine Starts
1 No Yes Yes No
2 Yes No Yes No
3 Yes Yes No Yes
4 Yes Yes Yes Yes
Engine
Run
Test
Number
Parking Brake
Engaged
Forward/Reverse Control
(SDLA) in Neutral
Operator Present in Seat Engine Runs
5 Yes Yes Yes Yes
6 Yes Yes No Yes
7 Yes No No No
8 Yes No Yes No
9 No Yes No No
PTO
Test
Number
PTO Switch Operator Present in Seat PTO Clutch
10 Off Yes Off
11 Pull to ‘On’ Position No No
12 Pull to ‘On’ Position Yes Yes
13 On
Raise Operator Body Weight
from Seat
PTO Disengages
(1/2 second delay)
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