Type "Uxxx" Faults - Genie GRC-12 Service Manual

Section 5 • Diagnostics

Type "UXXX" Faults

DTC Message on
Number GCON LCD
U001:SWITCHFAULT
U001
GCON MAIN FTN EN
U002: SWITCHFAULT
U002
GCON PLAT UP
U003: SWITCHFAULT
U003
GCON PLAT DOWN
U004:SWITCHFAULT
U004
GCON LCD UP
U005:SWITCHFAULT
U005
GCON LCD DOWN
U006:SWITCHFAULT
U006
GCON LCD ENTER
U007:SWITCHFAULT
U007
GCON LCD ESCAPE
U014:SWITCHFAULT
U014
PCON DRIVE EN
U015:SWITCHFAULT
U015
PCON STEER LEFT
U016:SWITCHFAULT
U016
PCON STEER RIGHT
U017:SWITCHFAULT
U017
PCON HORN
U018:SWITCHFAULT
U018
PCON LO DRIV SPD
U019:SWITCHFAULT
U019
PCON LO LIFT SPD
U020:SWITCHFAULT
U020
PCON HI LIFT SPD
U021:SWITCHFAULT
U021
PCON UP
U022:SWITCHFAULT
U022
PCON DOWN
U033:JSTICKFAULT
U033
OUT OF CAL RANGE
U034:JSTICKFAULT
U034
OUT OF RANGE:HI
U035:JSTICKFAULT
U035
OUT OF RANGE:LO
U036:SWITCHFAULT
U036
GCON + PCON:ON
5 - 10
Problem
Description
Short circuit of the GCON main
function enable switch at
system startup.
Short circuit of the GCON up
directional switch at system
startup.
Short circuit of the GCON
down directional switch at
system startup.
Short circuit of the GCON LCD
scroll up switch at system
startup.
Short circuit of the GCON LCD
scroll down switch at system
startup.
Short circuit of the GCON LCD
enter switch at system startup.
Short circuit of the GCON LCD
escape switch at system
startup.
Short circuit of the PCON drive
enable switch at system
startup.
Short circuit of the PCON steer
left switch at system startup.
Short circuit of the PCON steer
right switch at system startup.
Short circuit of the PCON horn
switch at system startup.
Short circuit of the PCON low
drive speed switch at system
startup.
Short circuit of the PCON low
lift speed switch at system
startup.
Short circuit of the PCON high
lift speed switch at system
startup.
Short circuit of the PCON up
directional switch at system
startup.
Short circuit of the PCON
down directional switch at
system startup.
PCON drive joystick signal is
outside acceptable calibration
range at system startup.
Short circuit of the PCON drive
joystick signal to battery
positive at system startup.
Short circuit of the PCON drive
joystick signal to battery
negative at system startup.
Mis-wiring or short circuit of
GCON key switch.
GRC
Possible
Causes
• Short circuit of the GCON main function
enable switch.
• GCON ECM.
• Short circuit of the GCON up directional
switch.
• GCON ECM.
• Short circuit of the GCON down directional
switch.
• GCON ECM.
• Short circuit of the GCON LCD scroll up
switch.
• GCON ECM.
• Short circuit of the GCON LCD scroll down
switch.
• GCON ECM.
• Short circuit of the GCON LCD enter switch.
• GCON ECM.
• Short circuit of the GCON LCD escape
switch.
• GCON ECM.
• Short circuit of the PCON drive enable
switch.
• GCON ECM.
• Short circuit of the PCON steer left switch.
• GCON ECM.
• Short circuit of the PCON steer right switch.
• GCON ECM.
• Short circuit of the PCON horn switch.
• GCON ECM.
• Short circuit of the PCON low drive speed
switch.
• GCON ECM.
• Short circuit of the PCON low lift speed
switch.
• GCON ECM.
• Short circuit of the PCON hi lift speed switch.
• GCON ECM.
• Short circuit of the PCON up directional
switch.
• GCON ECM.
• Short circuit of the PCON down directional
switch.
• GCON ECM.
• PCON drive joystick is not in neutral position
at startup.
• PCON joystick.
• GCON ECM.
• Short circuit of PCON drive joystick signal
circuit.
• PCON joystick.
• GCON ECM.
• Short circuit of PCON drive joystick signal
circuit.
• PCON joystick.
• GCON ECM.
• Short circuit in the GCON key switch
harness.
• GCON key switch.
• GCON ECM.
September2016
REV A
Failure
Mode
All GCON functions
inhibited.
All GCON functions
inhibited except
platform down.
All GCON functions
inhibited except
platform up.
All GCON LCD
menu functions
inhibited.
All GCON LCD
menu functions
inhibited.
All GCON LCD
menu functions
inhibited.
All GCON LCD
menu functions
inhibited.
All PCON drive and
steer functions
inhibited.
All PCON drive and
steer functions
inhibited.
All PCON drive and
steer functions
inhibited.
PCON horn switch
function inhibited.
The machine is
limited to low drive
speed.
PCON platform up
& down functions
inhibited.
PCON platform up
& down functions
inhibited.
PCON platform up
function inhibited.
PCON platform
down functions
inhibited.
All PCON drive and
steer functions
inhibited.
All PCON drive and
steer functions
inhibited.
All PCON drive and
steer functions
inhibited.
All functions
inhibited.
Part No. 227123