JLG 1230ES Service Manual - Manual (Page 141)

SECTION 8 - DIAGNOSTIC TROUBLE CODES
3121222 – JLG Lift – 8-9
253 DRIVE PREVENTED - CHAR-
GER CONNECTED Driving is not possible while the vehicle is
charging. • Check if the charger is connected to off board power source and
disconnect if desired.
• Check ANALYZER -> MACHINE SETUP -> CHARGER INTERLOC
is set as desired.
• Check that charger's red (positive) battery wire connector termi-
nal is receiving power (24V) from batteries.
• Check signal from charger interlock connector terminal 2 to
ground board terminal J1-29, where 0VDC indicates charging in
process.
254 DRIVE & LIFT UP PRE-
VENTED - CHARGER CON-
NECTED Drive or lift is not possible while the vehi-
cle is charging AND is configured to pre-
vent all motion. • Check if the charger is connected to off board power source and
disconnect if desired.
• Check ANALYZER -> MACHINE SETUP -> CHARGER INTERLOC
is set as desired. (Must be in ACCESS LEVEL 1 to change.)
• Check that charger's red (positive) battery wire connector termi-
nal is receiving power (24V) from batteries.
• Check signal from charger interlock connector terminal 2 to
ground board terminal J1-29, where 0VDC indicates charging in
process.
255 PLATFORM OVERLOADED The load sensing system measured plat-
form load is excessive. • Remove excess weight from the platform.
• Check that the platform is not caught on something, preventing up
or down movement.
• If any CAN bus faults are active, troubleshoot those first.
• Refer to Section 2.3: Troubleshooting in the LSS manual,
3124288.
256 DRIVE PREVENTED - POT-
HOLE NOT ENGAGED Driving is not possible while elevated
since the pot-hole protection system
failed to deploy. • Check for obstructions or mechanical problems around the pot-
hole protection mechanisms.
• Check that the PHP switches are securely mounted.
• Adjust pot-hole protection switches.
• Check the pothole protection switches signal and wiring to the
ground board. The left pot-hole protection switch input (24V) is
from ground board terminal J1-9, and its output (24V when
deployed) is to ground board terminal J1-10. The right pot-hole
protection switch input (24V) is from ground board terminal J1-
17, and its output (24V when deployed) is to ground board termi-
nal J1-18.
257 ELEV PROX PERMANENTLY
CLOSED - CHECK PROX AND
ANGLE ADJUSTMENT The elevation proximity switch shows the
platform to be stowed, while the elevation
angle sensor shows the platform to be
raised. The elevation proximity switch is
only found on certain older lifts. This
switch is not used on current machines so
this DTC should not occur. • Verify that an elevation proximity switch is present on the
machine. If not, ensure ANALYZER -> MACHINE SETUP ->
ELEV PROX is set to NOT INSTALLED. If the switch is present, set
ELEV PROX to INSTALLED and check switch continuity. The
switch should close when placed in close proximity to ferrous
metal.
258 DRIVE & LIFT PREVENTED -
BRAKES ELECTRICALLY
RELEASED FOR TOWING Manual brake release mode is activated
with the switch in the battery box near the
ground control box. Drive or lift is not pos-
sible. • Push manual brake release switch again or cycle power to clear
manual brake release mode.
• Check if the brake release switch is obstructed or jammed.
• Check the brake release switch signal and wiring to the ground
board. The switch input (24V) is from ground board terminal J1-
19, and its output (24V when closed) is to ground board terminal
J1-20.
• Replace ground board.
2-5 Function Prevented
DTC FAULT MESSAGE DESCRIPTION CHECK