JLG 1350SJP Service Manual - Manual (Page 502)

SECTION 6 - JLG CONTROL SYSTEM
6-126 – JLG Lift – 3121142
11. Hit the right arrow button once. The screen will read: TROUBLESHOOTING: CHASSIS CAN COMMUNICATIONS
LOST
NOTE: CHASSIS CAN COMMUNICATIONS LOST (6/6) (Help Fault
Code 6-6) basically means all communication linked from
the Ground Module to the Chassis Module is lost.