JLG 1100SB Service Manual - Manual (Page 399)

SECTION 6 - JLG CONTROL SYSTEM
3121265 – JLG Lift – 6-115
Table 6-7. Troubleshooting: Platform 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 Ground Module J7 deutsche plug
connection at the "T" fitting inside of the ground
control station. Perform an ohms check at the ”A”
and ”B” pins of the "T" fitting. Inspect the shield
wire ”C” for shorts. Approximately 60 ohms. CANbus circuit is
complete. Platform
Module suspected
defective Reconnect plug and go to
step 3
3 Make sure the CANbus link wires are installed
correctly at the Platform Module. See Electrical Schematic in Sec-
tion 7 Go to step 4 Wire per Electrical Sche-
matic
4 Disconnect the platform cannon plug and ground
cannon plug that holds the CANbus link. Red (3)
Black (2) and Shield (1) perform a continuity test. Continuity Reconnect plug and go to
step 5 Repair or replace plat-
form harness.
5 Disconnect the deutsche plug connection from
the Platform Module at the ”T” fitting inside of the
ground station. Perform an ohms check at the ”A”
and ”B” sockets of the deutsche plug. Inspect the
shield wire ”C” for shorts. Approximately 120 ohms. Reconnect plug and go to
step 6 Suspected defective Plat-
form Module.
6 Inspect the Platform Module harness connection
at the ground cannon plug and at the ”T”’ fitting
inside of the ground control station. Continuity Reconnect harness and
go to step 7 Repair or replace harness
inside the ground control
station.
7 Disconnect the deutsche plug connection from
the Boom Length & Angle Module at the ”T’ fitting
inside of the ground station. Perform an ohms
check at the ”A” and ”B” sockets of the deutsche
plug. Inspect the shield wire ”C” for shorts. Approximately 120 ohms Reconnect plug and go to
step 8 Verify step 7, inspect the
BLAM to Ground Module
harness connection s at
both ”T" fitting connec-
tions for proper continuity
and correct wiring per
Electrical schematic.
8 Disconnect all deutsche plug connections at the
"T” fitting in the ground station and the BLAM,
perform a continuity test on all ”A” ”B” and ”C”
pins use the singular end of the fitting and cross
probe the corresponding letters of the other two
connections. Continuity (NO OHM VALUES) Reconnect all deutsche
plugs at the "T” fitting and
go to step 9 Replace defective ”T" fit-
ting plug.
9 Disconnect the Chassis Module deutsche plug at
the ”T’ fitting below the Boom Length & Angle
Module. Perform an ohms check at the ”A” and
”B” sockets of the deutsche plug. Inspect the
shield wire ”C” for shorts. Approximately 120 ohms Reconnect deutsche plug
and go to step 10 Inspect the harness from
the ”T” fitting at the BLAM
to the Chassis Module
plug connection at the
battery. Assure proper
continuity and correct
wiring per Electrical
Schematic.