JLG 1250AJP Service Manual - Manual (Page 552)

SECTION 6 - JLG CONTROL SYSTEM
6-120 – JLG Lift – 3121171
Table 6-9. Troubleshooting: BLAM 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 J 1 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.
BLAM suspected
defective. Reconnect plug and
go to step 3
3 Disconnect the Ground Module deutsche
plug from ”T” fitting at the BLAM above the
fuel tank. Perform an ohm check at the ”A”
and ”B” sockets of the deutsche plug.
Inspect the shield wire ”C ” for possible
short. Approximately 120 Ohms Reconnect harness
and go to step 4 Repair or replace the
Ground Module to
BLAM harness.
4 Verify the CANbus link signal wires are
installed correctly at the "T” fitting at the
Ground Module. Electrical Schematic Reconnect plug and
go to step 5 Wire per Electrical
Schematic
5 Verify the lift cylinder load moment har-
ness has good continuity and wired cor-
rectly at the J4 plug on the BLAM. Continuity Reconnect plug and
go to step 6
Repair or replace
Chassis Module har-
ness.
6 Disconnect the Chassis Module plug con-
nection at the battery and perform an ohm
check at the #1 and #2 socket of the
deutsche plug. Inspect the shield wire #3
for possible short. Approximately l 20 Ohms Reconnect plug and
stop Inspect harness and
connections to the
Chassis Module.