Code 32 - Pump Motor - Over Current; Code 31 - Platform Control Console - No Communication With Ground Control Module - JLG 15MVL Series Service Maintenance Manual

Code 31 - Platform Control Console - No Communication with Ground Control Module

Check For These Obvious Conditions First:
• Check the harness connection at the P4 connector on the Ground Control Module and the harness connection at the
other end on the Platform Junction Box.
Table 6-33. Code 31 - Platform Control Console - No Communication with Ground Control Module
STEP
1. Check if LEDs are illuminated on the Platform Control Console.
2. Remove the 9 pin Platform Control Console connector from the side of the
Platform Junction Box and the P4 connector at the Ground Control Module.
Check continuity from the P4 connector, pin-5 to Junction Box pin-3 and P4,
pin-9 to Junction Box pin-4.
3. Remove the 9 pin Platform Control Console connector from the side of the
Platform Junction Box. Check the voltage across pins-1 and 5 in the Junc-
tion Box connector.
4. Check voltage across pins-10 and 2 on connector P4 at the Ground Control
Module.
5. Check continuity of P4 connector, pin-10 to Platform Junction Box pin-1.
Also P4 connector, pin-2 to Platform Junction Box, pin-5.

Code 32 - Pump Motor - Over Current

Check For These Obvious Conditions First:
• Platform overload condition.
• Obstruction in mast system.
• Pump Positive (+) and Negative (–) connections are secure and undamaged.
• Crushed or kinked hydraulic lines.
• Hydraulic leaks.
STEP
1. Check current draw of pump motor by elevating the platform to full height
and load pump by continuing to press the UP button.
Is reading within spec?
2. Did unit give a 32 Fault Code while performing Step 1?
3. Is the pump hydraulic pressure setting within specification as show in Sec-
tion 1.6 of this Service Manual?
4. Check pump motor brushes and rotor commutator for abnormal wear.
3121231
ACTION
Table 6-34. Code 32 - Pump Motor - Over Current
ACTION
– JLG Lift –
SECTION 6 - TROUBLESHOOTING
SPEC YES
— Go To Step 2
— Repair or Replace
Platform Control
Console
24V DC Repair or Replace
Platform Control
Console
24V DC Go to Step 5
— Repair or Replace Wires
SPEC YES
Less than Go to Step 2
145 Amps
— Replace Ground
Control Module
See Section 1.6 Go to Step 4
— Replace as
Required
NO
Go to Step 3
Repair or Replace
Wiring
Go to Step 4
Replace Ground
Control Module
NO
Go to Step 3
—
Adjust to
Specification
Replace
Pump Motor
6-31