2 platform controls – JLG 3246ES Service Manual User Manual
Page 159
SECTION 6 - DIAGNOSTIC TROUBLE CODES
3121166
– JLG Lift –
6-7
224
FUNCTION PROBLEM -
STEER LEFT PERMA-
NENTLY SELECTED
The steer left switch was closed
during power-up in platform
mode.
• 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.
225
FUNCTION PROBLEM -
STEER RIGHT PERMA-
NENTLY SELECTED
The steer right switch was
closed during power-up in plat-
form mode.
• 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.
226
ACCELERATOR FAULTY -
WIPER OUT OF RANGE
The joystick signal is outside the
acceptable range of 0.50V - 4.5V,
or is unstable.
• 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.
227
STEER SWITCHES
FAULTY
The steer left and steer right
inputs were closed simultane-
ously.
• 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.
228
FUNCTION LOCKED
OUT - ACCELERATOR
NOT CENTERED
The joystick was not centered at
power-up.
• 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.
229
FUNCTION PROBLEM -
TRIGGER PERMA-
NENTLY CLOSED
The trigger switch was closed
during power-up in platform
mode.
• 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.
2210 TRIGGER CLOSED TOO
LONG WHILE IN NEU-
TRAL
The trigger switch was closed for
more than five seconds while
the joystick was centered.
• 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.
2-2 Platform Controls
DTC
FAULT MESSAGE
DESCRIPTION
CHECK