“4069RT” Service and Parts Manual March 2014
Page 4-5
TROUBLESHOOTING -- ELECTRICAL SYSTEM TROUBLESHOOTING
GP400 M
ODULE
The GP400 module is “the brains” of the system. It receives and processes a variety of
inputs both from the machine and the operator, then controls all the operative functions
of the machine. It also has a feature that allows the technician to access and monitor all
functionality of the system, along with a technician-friendly series of fault messages
that can be accessed through the use of the EZ-Cal scan tool. Flash codes are also
provided in case an EZ-Cal scan tool is not available.
Such information can be used for preventative maintenance and troubleshooting should
a problem arise. A comprehensive list of EZ-Cal accessible information can be found
later in this section.
The GP400 operates on 12 volts DC and should never be probed or operated with
voltage higher than 14 volts DC
Figure 4a-1: GP400 Module
ART_3185
1
3
13
15
13
10 12
1
3
13
15
1
3
13
15
1
3
13
15
1
3
1
3
1314
13
15
Diagnostic
LED
EZ-Cal
Connection
P1-1 — CAN BUS H
P1-2 — CAN BUS L
P1-3 — Ground
P2-1 — not used
P2-2 — not used
P2-3 — not used
P5-1 — Lift Valve
P5-2 — Steer Right
P5-3 — Steer Left
P5-4 — Drive Forward
P5-5 — Drive Reverse
P5-6 — Alarm
P5-7 — High Torque
P5-8 — High Speed
P5-9 — Hour Meter
P5-10 — not used
P5-11 — not used
P5-12 — not used
P5-13 — not used
P5-14 — Start Inhibit Warn
P5-15 — not used
OUTRIGGER VALVES
P6-1 — Back Pitchin
g Valve
P6-2 — Front Pitching Valve
P6-3 — Right Pitching Valve
P6-4 — Left Pitching Valve
P6-5 — not used
P6-6 — not used
P6-7 — not used
P6-8 — not used
P6-9 — not used
P6-10 — not used
P6-11 — not used
P6-12 — not used
P6-13 — Axle Lock
P6-14 — not used
P6-15 — Generator
BASE & LOWER CONTROLS
P7-1 — Valve Supply
P7-2 — Base Selected
P7-3 — UP - Base
P7-4 — Platform Selected
P7-5 — not used
P7-6 — not used
P7-7 — DOWN - Base
P7-8 — not
used
P7-9 — not used
P7-10 — Choke/Preheat
P7-11 — not used
P7-12 — Start
P7-13 — Oil Pressure Switch
P7-14 — not used
P7-15 — not used
P4-1 — Choke/Preheat
P4-2 — Starter
P4-3 — not used
P4-4 — Throttle
P4-5 — Fuel
P4-6 — Fuel
P4-7 — Alt Exciter
P4-8 — Ignition
P4-9 — not used
P4-10 — Rear Wheel Bypass Valve
P4-11 — not used
P4-12 — Proportional
P4-13 — not used
P4-14 — Down Valve 1
P4-15 — not used
P8-1 — Elevation Transducer
P8-2 — not used
P8-3 — not used
P8-4 — not used
P8-5 — CE Elevation
P8-6 — Analog IN
P8-7 — not used
P8-8 — TBM Analog IN
P8-9 — not used
P8-10 — not used
P8-11 — not used
P8-12 — not used
P8-13 — Ground
P8-14 — Ground
P8-15 — Ground
NOT USED
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