JLG 1100SB Service Manual - Manual (Page 409)

SECTION 6 - JLG CONTROL SYSTEM
3121265 – JLG Lift – 6-125
Table 6-9. Troubleshooting: Chassis Can Communications Lost
STEP ACTION REQUIRED SPEC YES NO
1 Install the Analyzer at the ground station, scroll to
the ”Diagnostics” sub level menu, press ”enter”
then scroll to the ”Versions” menu item press
”enter” and view the screen, reference the Diag-
nostics / Version Chart to assist you in determin-
ing which module has lost it’s communication
link. In some cases the module that shows up
with a question may be defective if all other CAN-
bus links check OK. See Diagnostics / Version Chart See step 2 See step 2
2 Disconnect the BLAM J1 deutsche plug connec-
tion at the "T" fitting just above the fuel tank. Per-
form an ohms check at the ”A” and ”B” pins of the
”T” fitting. Inspect the shield wire ”C” for possible
short. Approximately 60 ohms. CANbus circuit is
complete. Chassis
Module suspected
defective. Reconnect plug and go to
step 3
3 Disconnect the Chassis Module communication
harness from the BLAM ”T” fitting and Chassis
Module plug connection at the battery. Perform a
continuity test. Continuity Reconnect harness and
go to step 4 Repair or replace BLAM
and Chassis Module har-
ness.
4 Verify the CANbus link signal wires are installed
correctly at the Chassis Module plug connection
at the battery and at the plug below the swivel. Electrical Schematic Reconnect plug and go to
step 6 Wire per Electrical Sche-
matic
5 Verify continuity at the Chassis Module harness
from the plug connection at the battery down to
the plug connection below the swivel. Continuity Reconnect plug and go to
step 6 Repair or replace Chassis
Module harness.
6 Disconnect the Chassis Module plug connection
below the swivel and perform an ohms check at
the #1 and #2 of the plug. Inspect the shield wire
#3 plug connection for possible short. Approximately 120 Ohms Stop Replace Chassis Module