JLG 3246ES Service Manual - Manual (Page 160)

SECTION 6 - DIAGNOSTIC TROUBLE CODES
6-8 – JLG Lift – 3121166
2232 FUNCTION PROBLEM -
DRIVE & LIFT BOTH
OPEN
The drive and lift inputs are both
de-energized in Platform Mode. • Check if either function is active, if Yes;
• Repair the wiring or switch to clear the message.
• ZAPI - HEALTH (Status LED) - ON
2-3 Ground Controls
DTC FAULT MESSAGE DESCRIPTION CHECK
231 FUNCTION PROBLEM -
LIFT PERMANENTLY
SELECTED The ground control box lift
switch was closed up or down,
during power-up in ground
mode. • Check if the lift switch is obstructed or jammed.
• Check the lift switch signal and wiring to the ground
board. The lift switch input (24V) is from ground
board terminal J2-4, and its outputs (24V when
closed) are to ground board terminals J2-6, J2-7 (up
and down).
• Replace ground board.
232 GROUND LIFT UP /
DOWN ACTIVE
TOGETHER The lift up / down inputs are
closed simultaneously. • Check if the lift switch is obstructed or jammed.
• Check the lift switch signal and wiring to the ground
board. The lift switch input (24V) is from ground
board terminal J2-4, and its outputs (24V when
closed) are to ground board terminals J2-6 (up), J2-7
(down).
• Replace ground board.
233 FUNCTION PROBLEM -
BRAKE RELEASE PERMA-
NENTLY SELECTED The manual brake release switch
was closed during power-up. • Check if the brake release switch is obstructed or
jammed.
• Check the brake release switch signal and wiring to
the ground board. The brake release switch input
(24V) is from ground board terminal J1-19, and its out-
put (24V when closed) is to ground board terminal J1-
20.
• If the brakes are released, the machine can be pushed
or moved without drive motor power.
• Replace ground board.
2-5 Function Prevented
DTC FAULT MESSAGE DESCRIPTION CHECK
251 ELEV ANGLE SENSOR
FAULTY - VOLTAGE OUT
OF RANGE The elevation angle sensor
input voltage is outside the
acceptable range of 0.10V -
4.50V. • Check that the platform elevation sensor is securely
mounted and undamaged.
• Check voltage as displayed on ANALYZER -> DIAG-
NOSTICS -> ELEV SENSOR -> ANGLE SNSR. Backprobe
ground board J1-15. If this voltage disagrees with the
ANGLE SNSR voltage, replace the ground board.
• Backprobe the elevation angle sensor connector. Ter-
minal A should be 4.7V, terminal C should be 0V.
• Check the elevation angle sensor signal and wiring to
the ground board. The elevation angle sensor input is
from ground board terminal J1-14 (4.7V), its output
(0.1 - 1.2V when stowed) is to ground board terminal
J1-15, and its ground is to ground board terminal J1-
16.
• Replace the ground board.
2-2 Platform Controls
DTC FAULT MESSAGE DESCRIPTION CHECK