Ground Module Failure: Ref Voltage Out Of Range; Ground Module Failure: Vlow Fet Failure; Hourmeter Short To Battery; Jib Down Solenoid Open Circuit - JLG T350 Troubleshooting Manual

SECTION 2 - TROUBLESHOOTING BY FAULT MESSAGES

2.85 GROUND MODULE FAILURE: REF VOLTAGE OUT OF RANGE

Distress Lamp: 9
The Ground Module has detected that the +7V reference voltage source is out of range. This may be caused by a wiring
short to one of the reference voltage pins on the Ground Module, or by a faulty Ground Module
All Functions Operable
Possible Causes: 4.1.10

2.86 GROUND MODULE FAILURE: VLOW FET FAILURE

Distress Lamp: 9
The control system will not function because the Ground Module has experienced a hardware failure that prevents it from
reading High-Sensing Digital Inputs.
Functions Disabled: Lift Up, Lift Down, Swing Left, Swing Right, Telescope In, Telescope Out, Jib Up, Jib Down, Level Up,
Level Down, Front Left O/R, Front Right O/R, Rear Left O/R, Rear Right O/R, Set (Extend O/R), Stow (Retract O/R), Engine
Start, Engine Throttle Pull, Engine Throttle Hold, Engine Choke Pull, Engine Choke Hold
Possible Causes: 4.1.10

2.87 HOURMETER SHORT TO BATTERY

Distress Lamp: 9
Ground module feedback shows that the hourmeter output may be shorted to battery or another function
(Open Circuit and Short to Ground detection are disabled since they cannot be detected reliably with this style load)
All Functions Operable
Possible Causes: Short in Brn/Wht 47-7-1, Short in Brn/Wht 47-7, 4.1.24, 4.1.10

2.88 JIB DOWN SOLENOID OPEN CIRCUIT

Distress Lamp: 9
Ground module feedback shows that the Jib Down PWM output may be disconnected or the solenoid may be defective.
T500J MODELS ONLY
Functions Disabled: Jib Down
Step Pretest Instructions
2.88.1 Short X056.1.soc to
X056.2.soc
2.88.2 Short X055.11.pin to
X055.12.pin
2.88.3 Short X019.11.soc to
X019.12.soc
2.88.4 Short X002.20.pin to B-
2-80
ADE Code: 9-9
ADE Code: 9-9
ADE Code: 3-3
ADE Code: 3-3
Test
Is the fault removed?
Is the fault removed?
Is the fault removed?
Is the fault removed?
T350 T500J
Result
Yes
No
Yes
No
Yes
No
Yes
No
Corrective Action
Repair/Replace solenoid
Go to step 2.88.2
Yel/Blk or Brn/Blk boom wire broken
between X055 and X056. Repair or
replace
Go to step 2.88.3
Yel/Blk or Brn/Blk boom wire broken
between X019 and X055. Repair or
replace
Go to step 2.88.4
Blue 28-3-1 or black wire broken
between X002 and X019. Repair or
replace
Possible Causes: 4.1.10
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