JLG 3246ES Service Manual - Manual (Page 161)

SECTION 6 - DIAGNOSTIC TROUBLE CODES
3121166 – JLG Lift – 6-9
252 ELEV ANGLE SENSOR
HAS NOT BEEN CALI-
BRATED The elevation angle sensor has
not been calibrated. • Calibrate the elevation angle sensor to clear fault. See
Section 5.5.
253 DRIVE PREVENTED -
CHARGER 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 con-
nector terminal is receiving power (24V) from batter-
ies.
• Check signal from charger interlock connector termi-
nal 2 to ground board terminal J1-29, where 0VDC
indicates charging in process.
254 DRIVE & LIFT UP PRE-
VENTED - CHARGER
CONNECTED Drive or lift is not possible while
the vehicle is charging AND is
configured to prevent 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 con-
nector terminal is receiving power (24V) from batter-
ies.
• Check signal from charger interlock connector termi-
nal 2 to ground board terminal J1-29, where 0VDC
indicates charging in process.
255 PLATFORM OVER-
LOADED The load sensing system mea-
sured platform 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 man-
ual, 3124288.
256 DRIVE PREVENTED -
POTHOLE NOT
ENGAGED Driving is not possible while ele-
vated since the pot-hole protec-
tion 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 wir-
ing 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 terminal J1-18.
257 ELEV PROX PERMA-
NENTLY 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 prox-
imity switch is only found on cer-
tain 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.
2-5 Function Prevented
DTC FAULT MESSAGE DESCRIPTION CHECK