Keyswitch Faulty - JLG T350 Troubleshooting Manual

SECTION 2 - TROUBLESHOOTING BY FAULT MESSAGES

2.97 KEYSWITCH FAULTY

Distress Lamp: 9
The Platform and Ground Mode inputs from the keyswitch (Platform:X007.2, Ground:X007.3) are active at the same time.
The control system will default to Ground Mode.
Functions Disabled at Platform Only: 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
Step Pretest Instructions
2.97.1 Extract X014.15. Switch Key
to Ground Mode and pull the
ground emergency stop
switch
2.97.2 Extract X014.15. Switch Key
to Ground Mode and pull the
ground emergency stop
switch
2.97.3 Find diode at X009 connected
to Yel/Red 2-7, Yel/Red 2-44,
and Yel/Red 2-9. Disconnect
this diode from X009 and the
other diode. Switch Key to
Ground Mode and pull the
ground emergency stop
switch
2.97.4 Extract X019.6. Switch Key to
Ground Mode and pull the
ground emergency stop
switch
2.97.5 Extract X007.1. Switch Key to
Ground Mode and pull the
ground emergency stop
switch
2-86
ADE Code: 2-1
Test
Is the fault removed?
Measured voltage at X026.1
= 0V
Is the fault removed?
Is the fault removed?
Is the fault removed?
T350 T500J
Result
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Corrective Action
Go to step 2.97.2
Go to step 2.97.3
Replace or repair select switch in
ground panel
Replace or repair Yel/Red 2-4 wire
Replace the diodes at X009
Go to step 2.97.4
Possible Causes: Short in Yel/Red 2-4
or Orange or Yellow Boom wires
Go to step 2.97.5
Possible Causes: Short in Yel/Red 2-
44, 4.1.10
Possible Causes: Short in Yel/Red 2-
9, 4.1.10
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