REV A
September2016
Section 5 • Diagnostics
5 - 4
GRC
Part No. 227123
DIAGNOSTICS
Operational Indicator Codes
(OIC)
These codes are generated by the electrical
system to indicate machine operating status
such as Off-level, Chassis Mode Operation and
Pothole Guard Stuck, during normal operation.
These codes are not indicators of a device
malfunction in the electrical system.
Code
Condition
LL
Off-Level
CH
Chassis Mode Operation
PHS
Pothole Guard Stuck
ND
No Drive (option)
Diagnostic Trouble Codes (DTC)
These codes are generated by the system to
indicate that a device or circuit malfunction has
been detected in the electrical system.
The types of Diagnostic Trouble Codes that may
occur are explained below.
Type "HXXX" - Indicate a malfunction
associated with devices that control hydraulic
functions in the electrical system. The "HXXX"
faults are divided into short circuit battery
negative, short circuit to battery positive, open
circuit and generic shorts. Example of these
devices are solenoid controlled hydraulic valves
and motor controller.
Type "PXXX" - Indicate a malfunction associated
with power type devices in the electrical system.
The "PXXX" faults are divided into short circuit to
battery negative, short circuit to battery positive,
open circuit and generic shorts. Example of
these devices are horns, sensor power and
alarms.
Type "UXXX" - Indicate a malfunction associated
with user interface devices in the electrical
system. The "UXXX" faults are divided into short
circuit to battery negative, short circuit to battery
positive, open circuit and generic shorts.
Example of these devices are GCON up and
down switches and PCON drive joystick faults.
Type "FXXX" - Indicate a malfunction associated
with machine feedback devices in the electrical
system. The "FXXX" faults are divided into short
circuit to battery negative, short circuit to battery
positive, open circuit and generic shorts.
Example of these devices are limit switches,
height sensors and pressure transducers.
Type "CXXX" - Indicate a malfunction associated
with controls devices in the electrical system.
Example of these devices are platform controls
and ground controls ECM.
