JLG 1350SJP Service Manual - Manual (Page 503)

SECTION 6 - JLG CONTROL SYSTEM
3121142 – JLG Lift – 6-127
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 ”Diag-
nostics” sub level menu, press ”enter” then scroll to the ”Ver-
sions” menu item press ”enter” and view the screen,
reference the Diagnostics / Version Chart to assist you in
determining 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 CANbus links check OK. See Diagnostics / Version Chart See step 2 See step 2
2 Disconnect the BLAM J1 deutsche plug connection at the "T"
fitting just above the fuel tank. Perform 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 com-
plete. 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 harness.
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 Schematic
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 Mod-
ule 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