JLG 10MSP Service Manual - Manual (Page 121)

SECTION 6 - TROUBLESHOOTING
3121228 – JLG Lift – 6-17
6.11 FAULT CODE TROUBLESHOOTING TABLES
Machine in Drive Speed Cut-Back (Turtle) Mode All The Time
Overview of Procedure
Under normal machine operation once the platform is elevated the machine’s maximum drive speed is reduced to 1/4 the
normal drive speed of when the platform is fully lowered. This is detected with a drive speed cut-back (proximity) switch
mounted at the base of the mast assembly and a target mounted on the mast assembly. When the mast is elevated and the
target raised the proximity switch then cuts back the machine drive speed. When machine is in the drive speed cut-back
mode a turtle is displayed on the Ground Control Module LCD display.
Check For These Obvious Conditions First:
• Mast drive speed cut-back (proximity) switch and target plate secure and undamaged.
Table 6-5. Machine In Drive Speed Cut-Back (Turtle) Mode All The Time
STEP ACTION SPEC YES NO
1. With the machine powered on and the platform fully lowered, check for con-
tinuity on the wires of the Cutback Proximity Switches. At the Ground Con-
trol Module, P2 connector, check continuity between pins-8 and 18 (switch
1) and pins-9 and 19 (switch 2). — Replace Ground
Control Module
Repair or Replace
Speed Cutback
(Proximity) Switch