JLG 15/20MSP Service Manual - Manual (Page 156)

SECTION 6 - TROUBLESHOOTING
6-36 – JLG Lift – 3121231
Codes (100 - 199) Ground Control Module - Fault Condition
Check For These Obvious Conditions First:
• That all battery and harness connectors secure and undamaged on Ground Control Module.
• Batteries have sufficient charge.
• Confirm that the static ground strap attached under base frame is secure and undamaged.
Table 6-40. Codes (100 - 199) Ground Control Module - Fault Condition
STEP ACTION SPEC YES NO
1. Recycle machine power 5 times allowing a 10 second interval between
each power recycle. Does fault clear? — Done Go to Step 2
2. Which code number is displaying? Code 103 Go to Step 3 Replace
Ground Control
Module
Code 119 Go to Step 5
3. Confirm that both installed batteries are 12 Volt DC. 12V DC Go to Step 4 Replace with proper
Batteries
4. Check battery voltage while charger is operating. Is voltage within specifi-
cation? Maximum of
31 Volts DC
Replace
Ground Control
Module
Repair or Replace
Battery Charger
5. Remove the communications cable, P5 connector at the Ground Control
Module and round connector at the Traction Control Module. Check conti-
nuity of all three (3) wires in the communications cable from end to end. P5
- Pins 2, 3, and 4. — Go to Step 6 Repair or Replace
Wire(s)
6. With communications cable still disconnected at both ends, check for con-
tinuity between Pins 2, 3, and 4 at the P5 connector end. — Repair or Replace
Wires
Go to Step 7
7. Plug the communications cable on the Traction Control Module to the round
socket on the opposite end of the module. Does this fix problem? — Done Replace
Ground Control
Module