Service Manual Instruction Manual

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 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 CAN-
bus links check OK.
See Diagnostics / Version
Chart
See step 2 See step 2
2 Disconnect the BLAM J1 deutsche plug con-
nection 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 communi-
cation harness from the BLAM ”T” fitting and
Chassis Module plug connection at the bat-
tery. Perform a continuity test.
Continuity Reconnect harness and
go to ste p 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 har-
ness 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 Chas-
sis Module harness.
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 connection
for possible short.
Approximately 120 Ohms Stop Replace Chassis Mod-
ule