Function Problem - Steer Left Permanently Selected; Function Problem - Steer Right Permanently Selected; Accelerator Faulty - Wiper Out Of Range; Steer Switches Faulty - Oshkosh JLG 1930ES Service Maintenance Manual

2-2 Platform Controls
DTC FAULT MESSAGE
224 FUNCTION PROBLEM -
STEER LEFT PERMA-
NENTLY SELECTED
225 FUNCTION PROBLEM -
STEER RIGHT PERMA-
NENTLY SELECTED
226 ACCELERATOR FAULTY -
WIPER OUT OF RANGE
227 STEER SWITCHES
FAULTY
228 FUNCTION LOCKED
OUT - ACCELERATOR
NOT CENTERED
229 FUNCTION PROBLEM -
TRIGGER PERMA-
NENTLY CLOSED
3121656
DESCRIPTION
The steer left switch was closed
during power-up in platform
mode.
The steer right switch was
closed during power-up in plat-
form mode.
The joystick signal is outside the
acceptable range of 0.50V - 4.5V,
or is unstable.
The steer left and steer right
inputs were closed simultane-
ously.
The joystick was not centered at
power-up.
The trigger switch was closed
during power-up in platform
mode.
(Japanese or Korean Specifica-
tion Only)
The footswitch in the platform
and trigger switch were closed
during power-up in platform
mode.
SECTION 6 - DIAGNOSTIC TROUBLE CODES
CHECK
• Check if the steer left switch is obstructed or jammed.
• Check steer left switch and its wiring. The steer left
switch input (24V) is from platform board terminal J1-
1, and its output (24V when closed) is to platform
board terminal J1-15.
• Replace platform board.
• Check if the steer right switch is obstructed or
jammed.
• Check steer right switch and its wiring to the platform
board. The steer right switch input (24V) is from plat-
form board terminal J1-1, and its output (24V when
closed) is to platform board terminal J1-16.
• Replace platform board.
• Center joystick and check to see if a power cycle will
clear DTC.
• Check the joystick signal and its wiring. The joystick
input (5V) is from the platform board terminal J1-5, its
output (2.5V with joystick at center) to the platform
board terminal J1-6, and its ground (0V) is to the plat-
form board terminal J1-7. Observe output signal while
slowly operating joystick.
• Replace platform board.
• Check if the steer switches are damaged, obstructed
or jammed.
• Check the steer switch signals and wiring to the plat-
form board. The steer switch input (24V) is from plat-
form board terminal J1-1, outputs (24V when closed)
are to platform board terminals J1-15 and J1-16 (left
and right).
• Replace platform board.
• Release joystick and allow to center.
• Check if the joystick is obstructed or jammed.
• Check the joystick signal and its wiring. The joystick
input (5V) is from the platform board terminal J1-5, its
output (2.5V with joystick at center) to the platform
board terminal J1-6, and its ground (0V) is to the plat-
form board terminal J1-7. Observe output signal while
slowly operating joystick.
• Replace platform board.
• Check if the trigger switch is obstructed or jammed.
• Check the trigger switch signal and wiring to the plat-
form board. The trigger input (24V) is from platform
board terminal J1-1, and its output (24V when closed)
is to platform board terminal J1-8.
• Replace platform board.
• Release one switch.
• Repair the switches/wiring to clear the difficulty.
6-7