SECTION 6 - DIAGNOSTIC TROUBLE CODES
6-6
– JLG Lift –
3121273
223
FUNCTION PROBLEM -
DRIVE & LIFT ACTIVE
TOGETHER
The Drive - Lift Selector Switch indi-
cates that both functions are selected
simultaneously
• Check drive/lift switch for visible damage.
• Check switch continuity. There should only be continuity from the
center post to one of the outer posts at a time. Otherwise, replace
the switch.
• Check drive/lift switch signal and wiring to the ground module.
"Lift" selection output (24V when selected) is terminal J2-3.
"Drive" selection output (24V when closed) is terminal J2-13.
• Replace platform board.
• HEALTH (Status LED) - ON
224
FUNCTION PROBLEM -
STEER LEFT PERMANENTLY
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, its output (24V when
closed) is to terminal J2-4.
• Replace platform board.
• HEALTH (Status LED) - ON
225
FUNCTION PROBLEM -
STEER RIGHT PERMA-
NENTLY SELECTED
The steer right switch was closed dur-
ing power-up in platform mode.
• Check if the steer right switch is obstructed or jammed.
• Check steer right switch and its wiring, its output (24V when
closed) is to terminal J2-12.
• HEALTH (Status LED) - ON
226
ACCELERATOR FAULTY -
WIPER OUT OF RANGE
The joystick (accelerator) wiper signal
input is outside the acceptable voltage
range.
• Center joystick and check to see if a power cycle will clear DTC.
• The wiper wire may be off, shorted to +B, or shorted to -B
(ground) to cause this difficulty.
• Check voltage on MS35 connector pins - A - 5V, B - 0.5 to 4.5V,
and C - 0V.
• HEALTH (Status LED) - ON
227
STEER SWITCHES FAULTY
Both the Steer Left and Steer Right
Inputs are closed as the same time.
• Check if the steer switches are damaged, obstructed or jammed.
• A short in the Steer Switch wiring or a failed Steer Switch can
cause this difficulty.
• Check the steer switch signals and wiring outputs (24V when
closed) to terminals J2-4 and J2-12 (left and right).
• HEALTH (Status LED) - ON
228
FUNCTION LOCKED OUT -
ACCELERATOR NOT CEN-
TERED
Selected function (Drive or Lift) is not
allowed because the joystick (accelera-
tor) 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.
• Check voltage at MS35.
• HEALTH (Status LED) - ON
229
FUNCTION PROBLEM - TRIG-
GER PERMANENTLY
CLOSED
Trigger Switch in the Platform Control
Box was closed at power-up.
• Check if the trigger switch is obstructed or jammed.
• Release switch or repair the switch / wiring to clear the difficulty.
• Check the trigger switch signal and wiring. The trigger input (24V
when closed) is to terminal J2-10.
• HEALTH (Status LED) - ON
2210
TRIGGER CLOSED TOO LONG
WHILE IN NEUTRAL
Trigger Switch in the Platform Control
Box was closed for more than five sec-
onds while the Joystick (accelerator)
was in the neutral position (centered)
• Release switch or repair the switch / wiring to clear the difficulty.
• Check if the trigger switch is obstructed or jammed.
• Check the trigger switch signal and wiring. The trigger input (24V
when closed) is to terminal J2-10.
• HEALTH (Status LED) - ON
2232
FUNCTION PROBLEM -
DRIVE & LIFT BOTH OPEN
In Platform Mode, the Drive - Lift Selec-
tor Switch indicates that neither func-
tion is selected.
• Repair the wiring or switch to clear the message.
• Check if either function is active, if Yes;
• HEALTH (Status LED) - ON
2-2 Platform Controls
DTC
FAULT MESSAGE
DESCRIPTION
CHECK
