JLG 1250AJP Service Manual - Manual (Page 556)

SECTION 6 - JLG CONTROL SYSTEM
6-124 – JLG Lift – 3121171
Table 6-10. 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 Diagnos-
tics / Version Chart to assist you in deter-
mining 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
complete. Chassis
Module suspected
defective. Reconnect plug and
go to step 3
3 Disconnect the Chassis Module commu-
nication 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 Module har-
ness.
6 Disconnect the Chassis Module plug con-
nection below the swivel and perform an
ohms check at the #1 and #2 of the plug.
Inspect the shield wire #3 plug connec-
tion for possible short. Approximately 120 Ohms Stop Replace Chassis
Module