JLG 723A Service Manual - Manual (Page 189)

9.81 L2906H, 2906H, 3507H, 619A, 723A, 29.6LP, 29.6, 35.7
Electrical System
ALL WHEEL STEER
VALVE – SHORT TO
GROUND 33275 1 Deactivate output J2-4 All Wheel
Steer Valve.
Try to complete any pending steer
mode changes.
Display the “Steer Valve Failure”
screen on the LCD of the cabin’s
display.
The UGM detects a short to ground
at this output.
Power cycled.
APU PUMP RELAY –
OPEN CIRCUIT 33276 1 Inhibit operation of J1-13 APU
Pump Relay.
The platform option is configured
and the UGM detects an open
circuit at this output.
Power cycled.
APU PUMP RELAY –
SHORT TO
BATTERY 33277 1 Inhibit operation of J1-13 APU
Pump Relay.
The platform option is configured
and the UGM detects a short to
battery at this output.
Power cycled.
APU PUMP RELAY –
SHORT TO
GROUND 33278 1 Inhibit operation of J1-13 APU
Pump Relay.
The platform option is configured
and the UGM detects a short to
ground at this output.
Power cycled.
GLOWPLUGS –
OPEN CIRCUIT 33279 1, 2 Deactivate output J1-12 Glow-
plugs.
The UGM detects an open circuit at
this output.
Power cycled.
GLOWPLUGS –
SHORT TO
BATTERY 33280 1, 2 Deactivate output J1-12 Glow-
plugs.
The UGM detects a short to battery
at this output.
Power cycled.
GLOWPLUGS -
SHORT TO
GROUND 33281 1, 2 Deactivate output J1-12 Glow-
plugs.
The UGM detects a short to ground
at this output.
Power cycled.
ENGAGE STARTER
OUTPUT – OPEN
CIRCUIT 33282 1 Deactivate output J2-26 Engage
Starter.
The UGM detects an open circuit at
this output.
Power cycled.
ENGAGE STARTER
OUTPUT – SHORT
TO BATTERY 33283 1 Deactivate output J2-26 Engage
Starter.
Activate output J2-31 Fuel Enable
Signal.
The UGM detects a short to battery
at this output.
Power cycled.
ENGAGE STARTER
OUTPUT – SHORT
TO GROUND 33284 1 Deactivate output J2-26 Engage
Starter.
The UGM detects a short to ground
at this output.
Power cycled.
ALTERNATOR
EXCITATION LINE –
SHORT TO
BATTERY 33285 1, 2, 10 J1-32 Alternator Excitation output
will be deactivated.
J1-32-Alternator Excite (and thus
J4-7 Alternator D+) is HIGH for a
period of 2 seconds or more and an
ENGINE STOPPED state is
detected.
Power cycled.
FRONT MOTOR –
CURRENT
FEEDBACK
READING TOO LOW 33286 1 N/A The UGM detects the actual current
has deviated more than 250 mA
from the commanded current for
more than 1 second.
Power cycled.
Message Fault
Code
Indicators Other Actions Taken Trigger for Fault Latch Until