JLG 1250AJP Service Manual - Manual (Page 557)

SECTION 6 - JLG CONTROL SYSTEM
3121171 – JLG Lift – 6-125
Load Moment Pin Troubleshooting
The following Troubleshooting Charts outline diagnostic
measures to be taken to diagnose problems within the
Load Moment Pin portion of the JLG Control System. If
necessary, refer to Section 4 for information concerning
replacement of the Load Moment Pin.
Table 6-11. Load Moment Pin Troubleshooting: Can Communications Lost
STEP FAULT CODE/SYMPTOM REPAIR YES NO
1 6/6 CYLINDER LOAD PIN CAN COMMU-
NICATIONS LOST Check for correct and tight
wire connections at the
deutsch and phoenix con-
nectors of the Load Sens-
ing Pin harness and
perform a continuity check. Go to step 2 Replace harness.
(4922826)
2 Check for loose pins in the
potting of the Boom Length
& Angle Module J4 con-
nection. Replace the BLAM &
Perform the Boom
Sensor calibration
process. Go to step 3
3 Inspect the CANbus link
”T” fitting connections at
the BLAM & Ground Mod-
ule. Are the fittings dry? Go to step 4 Replace ”T” fitting
connector. (4460945)
4 Inspect the CANbus link
”T” fitting connections at
the BLAM & Ground Mod-
ule. Perform a continuity
check. Go to step 5 Replace ”T” fitting
connector. (4460945)
5 Check the J1 and J4 plug
connections on the BLAM,
make sure the notched
plugs line up with the plug
sockets correctly. Go to step 6 Position plug cor-
rectly.
6 Use the Analyzer, scroll – +
to the DIAGNOSTICS
menu, press ENTER, then
scroll to the MOMENT
menu, and press ENTER,
check to see i f Actual / Over
/ Under moment values are
registering on the screen
display. Go to step 6 Replace the load
moment pin. & Per-
form the Boom Sen-
sor calibration
process.
7 If they are, try boom sensor
calibration to see if the val-
ues come within the chart. If the problem still
exists, verify steps 1-7
again before contact-
ing the JLG Service
Dept. Replace the load
moment pin. & Per-
form the Boom Sen-
sor calibration
process.