Blam Can Communications Lost - JLG 1250AJP Troubleshooting Manual

SECTION 1 - FAULT DICTIONARY AND SELECTED TROUBLESHOOTING

1.46 BLAM CAN COMMUNICATIONS LOST

Flash Code: 6-6
BLAM CAN communications lost. The system cannot communicate with the Boom Length Angle Module (BLAM). This may
be due to wiring problems between the platform and chassis modules. Since the trunk of the CAN bus passes through the
BLAM, other CAN faults are also likely active. If power is lost to the BLAM, then power will not be provided to the cylinder
load pin and the CYLINDER LOAD PIN CAN COMMUNICATIONS LOST fault will also be active.
Note Pretest Instructions
1.46.1 Check the fault log for other
modules having lost com-
munication (6-6 codes)
1.46.2 Disconnect the BLAM mod-
ule J1 connector [X086]
1.46.3 Disconnect the 12 position
BLAM passthru connector
[X058]
1.46.4
1.46.5
1.46.6 Disconnect the BLAM mod-
ule J1 connector [X086]
1.46.7
1.46.8 Disconnect the BLAM mod-
ule J1 connector [X086] and
the ground module J7 con-
nector [X007]
1.46.9 View ANALYZER ⇒ DIAG-
NOSTICS ⇒ VERSIONS ⇒
GROUND MODULE SOFT-
WARE: Px.x and B.L.A.
MODULE SOFTWARE: Px.x
1-48
Test
Is the CYLINDER LOAD PIN CAN COMMUNI-
CATIONS LOST fault active?
Does the voltage between socket 5 and socket
4 of the BLAM module J1 connector
[X086.5.soc X086.4.soc] measure 12VDC?
Does the voltage between socket 1 and socket
6 of the 12 position BLAM passthru connector
[X058.1.soc X058.6.soc] measure 12VDC?
Does the voltage between any terminal of the
MTB Power Bus [X010] and any terminal of
the MTB ground bus [X009] measure 12VDC?
Does the CAN resistance between terminal 6
and terminal 7 of the BLAM module J1 con-
nector [X086.6 X086.7] measure 60Ω and
open circuit between terminal 6 and shield
[X086.6] and open circuit between terminal 7
and shield [X086.7]?
Does the CAN resistance between socket 6
and socket 7 of the BLAM module J1 connec-
tor [X086.6.soc X086.7.soc] measure 120Ω
and open circuit between socket 6 and shield
[X086.6.soc] and open circuit between socket
7 and shield [X086.7.soc]?
Is the MAIN ANGL1 CAN COMMUNICATIONS
LOST fault active in the fault log?
Is there CAN HI continuity between socket 6 of
the BLAM module J1 connector [X086.6.soc]
and socket 13 of the ground module J7 con-
nector [X007.13.soc] and CAN LO continuity
between socket 7 of the BLAM module J1 con-
nector [X086.7.soc] and socket 24 of the
ground module J7 connector [X007.24.soc]?
Are the BLAM and ground modules BOTH run-
ning the current software version?
1250AJP
Result Corrective Action
Yes Go to step 1.46.2
No Go to step 1.46.5
Yes Go to step 1.46.5
No Go to step 1.46.3
Yes Repair/replace the YEL/RED 2-70-2 and/or
BLACK wires between the Power or ground bus
connector [X010 X009] and the 12 position
BLAM passthru connector [X058]
No Go to step 1.46.4
Yes Repair the YEL/RED 2-70-2 and/or BLACK wires
between the battery and terminal 5 and terminal 4
of the BLAM module J1 connector [X086.5
X086.4]
No Check the connections, make sure the machine is
turned on, and return to step 1.46.2
Yes Go to step 1.46.8
No Go to step 1.46.6
Yes Go to step 1.46.26
No Go to step 1.46.7
Yes Go to step 1.46.13 to examine the CAN wiring
between the ground module and BLAM module
No Go to step 1.46.8
Yes Go to step 1.46.9
No Go to step 1.46.10
Yes Replace the BLAM module.
No Update all the software to the same version (latest
available)
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