JLG 340AJ Service Manual - Manual (Page 299)

SECTION 6 - JLG CONTROL SYSTEM
3121259 – JLG Lift – 6-55
TELESCOPE IN VALVE – OPEN
CIRCUIT 33189 The Ground Module detects an open circuit at the Telescope In Valve
output. Tele speed is limited to Creep Check for a good connection at
the solenoid and for continuity
through this circuit. With the
solenoid disconnected, an
open circuit voltage of nearly
8.0V exists on the Ground Mod-
ule output pin for diagnostic
purposes. Inspect wiring for
physical damage. Cycle power
to clear the fault.
TELESCOPE IN VALVE – SHORT
TO GROUND 33190 The Ground Module detects a short to ground at the Telescope In
Valve output. Ground Module Telescope In
and Out outputs are disabled. Inspect wiring for physical
damage and check for wire
continuity. Check for coil dam-
age or shorting condition in
connector. Cycle power to clear
the fault.
GLOWPLUG – OPEN CIRCUIT 33279 The Ground Module detects an open circuit at the Glow Plug output.
(Kubota) No response required Check for a good connection at
the relay and for continuity
through this circuit. With the
relay disconnected, an open
circuit voltage of nearly 8.0V
exists on the Ground Module
output pin for diagnostic pur-
poses. Inspect wiring for physi-
cal damage. Cycle power to
clear the fault.
GLOWPLUG – SHORT TO BAT-
TERY 33280 The Ground Module detects a short to battery at the Glow Plug out-
put. (Kubota) Ground Module Glow Plug relay
output is disabled. Inspect wiring for physical
damage and check for wire
continuity. Cycle power to clear
the fault.
GLOWPLUG – SHORT TO
GROUND 33281 The Ground Module detects a short to ground at the Glow Plug out-
put. (Kubota) Ground Module Glow Plug relay
output is disabled. Inspect wiring for physical
damage and check for wire
continuity. Check for relay
damage or shorting condition
in connector. Cycle power to
clear the fault.
LIFT – CURRENT FEEDBACK
READING TOO LOW 33287 The Ground Module calls for current greater than 250mA, but the
actual current is at least 125mA less than the called for current for
more than 1 second The Ground Module suspends
Lift Up/Down commands and
reverts to Open Loop Current
control for Lift; Lift speed is lim-
ited to Creep after both Lift Up/
Down controls have been
returned to neutral and the
machine is not Enabled Part of the commanded current
is being divided either prior to
the solenoid connection or on
the ground return path. Inspect
wiring for physical damage and
check for wire continuity and a
low resistance return path.
Cycle power to clear the fault.
Table 6-10. Fault Code Troubleshooting Information
Help Message DTC Condition Producing DTC
Control System Response or
Machine Condition
Corrective Action/
Operational Requirement
for Function Movement
and/or to Clear Fault