Page 96
65-J Desel - Servce & Parts Manual
February 2021
Secton 19 - Troubleshootng
GP400 Module
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
onboard 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.
ART_4968
1
3
13
15
1
3
10
12
1
3
10
12
1
3
13
15
1
3
13
15
1
3
13
15
1
3
1
3
1
3
1
4
13
15
Diagnostic
LED
1
-
1
P
1
P
P1-2
P1-3
CAN BUS H
CAN BUS L
GROUND
1
-
2
P
2
P
P2-2
P2-3
CAN BUS H
CAN BUS L
GROUND
P14
P14-1
P14-2
P14-4
JIB UP SWITCH
JIB DOWN SWITCH
BOOM RET SWITCH REAR
P9
P9-2
P9-1
P9-3
P9-4
B+ SUPPLY
Rx
Tx
B- GROUND
EZ CAL
DIAGNOSTICS
P4-4
P4-5
P4-6
P4-7
P4-8
P4-13
P4-14
P4-15
P4
JIB UP
JIB DOWN
AXLE LOCK
SWING LEFT
SWING RIGHT
BRAKE DUMP VALVE
DUMP VALVE MAIN MANIFOLD
PLATFORM SUPPLY
P5-1
P5-2
P5-3
P5-6
P5-7
P5-8
P5-9
P5-12
P5
P5-5
P5-4
PLAT ROTATE LEFT
STEER RT
STEER LT
ALARM
TELE EXTEND
TELE RETRACT
TWO SPEED
TILT LIGHT
PUMP CONT #1 INTERLOCK
PLAT ROTATE RIGHT
P6
P6-1
P6-2
P6-4
P6-6
P6-9
P6-10
P6-11
P6-12
P6-13
P6-14
P6-7
P6-15
P6-3
BATTERY ISOLATOR
GENERATOR
START INHIBIT LIGHT
AUX BATTERY POWER
ALTERNATOR EXCITE
GLOW PLUG
STARTER
ELEC MOTOR COOLING FAN
IGNITION/FUEL HOLD
HOUR METER
HIGH RPM SOLENOID
HORN
LOW FUEL LIGHT
P7
P7-1
P7-2
P7-4
P7-6
P7-9
P7-10
P7-11
P7-12
P7-13
P7-14
P7-7
P7-15
P7-3
VALVE SUPPLY
KE SWITCH BASE SELECT
BOOM UP SWITCH
P7-5
GENERATOR RUNNING INPUT
ENGINE START
ENGINE STOP
AUX BATTERY SWITCH
BOOM DOWN SWITCH
TELE EXTEND SWITCH
TELE RETRACT SWITCH
ENG OIL PRESSURE SWITCH
ENGINE TEMP SWITCH
LOW FUEL SWITCH
LOW FUEL LIGHT
P8
P8-2
P8-6
P8-7
P8-15
GROUND TO MODULE
P8-14
GROUND TO MODULE
P8-13
GROUND TO MODULE
LOWER BOOM ANGLE SENSOR
LOWER BOOM ANGLE SENSOR
UPPER BOOM ANGLE SENSOR
UPPER BOOM ANGLE SENSOR 2
P8-3
P8-9
CURRENT MEASURE
P15
P15-1
P15-2
P15-3
P15-4
SWING LEFT SWITCH
SWING RIGHTSWITCH
PLAT LEVEL UP SWITCH
GLOW SWITCH
P15-5
P15-6
P15-7
P15-8
IDLE ENABLE SWITCH
PLAT LEVEL DOWN SWITCH
PLAT ROTATE RIGHT SWITCH
HI SPEED ENABLE SWITCH
P15-9
PLAT ROTATE LEFT SWITCH