Lt Rear Steer Rt Stg; Main Angl1 Can Communications Lost - JLG 1250AJP Troubleshooting Manual

SECTION 1 - FAULT DICTIONARY AND SELECTED TROUBLESHOOTING

1.184 LT REAR STEER RT STG

Flash Code: 8-6
Left rear steer right short to ground. The control system detected a short to ground on the chassis module left rear steer right
valve output [X233.7]. See 1.378 COMMON STG PROCEDURE on Pg. 175.

1.185 MAIN ANGL1 CAN COMMUNICATIONS LOST

Flash Code: 6-6
Main angle sensor 1 (right) CAN bus communications lost. The system cannot communicate with main angle sensor #1
(right). This may be due to wiring problems between main angle sensor #1 and ground module.
Note Pretest Instructions
1.185.1
1.185.2
1.185.3 Disconnect the main boom
angle sensor 1 (right) con-
nector [X048]. Turn on the
machine
1.185.4 Ground meter and take the
following measurement by
backprobing. See Ground-
ing and Backprobing on Pg.
319 for details.
1.185.5 Disconnect the tower boom
passthru - 21 position con-
nector [X044]. Turn on the
machine
1.185.6 Disconnect the MTB pass
thru - 21 position connector
[X042]. Turn on the machine
1.185.7 Ground meter and take the
following measurement by
backprobing. Turn on the
machine.
1.185.8 Disconnect the main boom
angle sensor 1 (right) con-
nector [X048]
1-100
Test
Is the EXCESSIVE CAN BUS COMMUNICA-
TION ERRORS fault active in the fault log?
Does the BLAM software version show "??" in
ANALYZER ⇒ DIAGNOSTICS ⇒ VERSIONS
⇒ B.L.A. MODULE SOFTWARE: ??
Does the voltage between socket 2 and socket
3 of the main boom angle sensor 1 (right) con-
nector [X048.2.soc X048.3.soc] measure
more than 7 VDC?
Use meter's min/max feature or observe
meter while turning on machine. Set up to
measure voltage at ground module J2 terminal
10 [X002.10]. Turn on the machine. Does volt-
age peak at 12 VDC? (This may need to be
repeated several times to see voltage spike.)
Does the voltage between socket J and socket
E of the tower boom passthru connector
[X044.J.soc X044.E.soc] measure more than
7 VDC?
Does the voltage between pin J and pin E of the
MTB pass thru connector [X042.J.pin
X042.E.pin] measure more than 7 VDC?
Does the voltage on terminal 10 of the ground
module J2 connector [X002.10] measure
more than 7VDC?
Is there 60 Ω between main boom angle sen-
sor 1 socket 4 and socket 5 [X048.4.soc
X048.5.soc]?
1250AJP
Result Corrective Action
Yes Troubleshoot 1.93 EXCESSIVE CAN BUS COM-
MUNICATION ERRORS on Pg. 73 first
No Go to step 1.185.2
Yes See 1.46 BLAM CAN COMMUNICATIONS LOST
on Pg. 48
No Go to step 1.185.3
Yes Go to step 1.185.4
No Go to step 1.185.5
Yes Go to step 1.185.8
No Replace ground module
Yes Repair the RED/BLK and/or BLACK wires
between the tower boom passthru connector
[X044.J X044.E] and the main boom angle sen-
sor 1 (right) connector [X048.2 X048.3]
No Go to step 1.185.6
Yes Repair the RED/BLK and/or BLACK wires
between the MTB pass thru connector [X042.J
X042.E] and the tower boom passthru connector
[X044.J X044.E]
No Go to step 1.185.7
Yes Repair the WHT/RED 57-10 wire between the
MTB pass thru connector [X042.J] and the
ground module J2 connector [X002.10] and/or
the BLACK wire between the MTB pass thru con-
nector and ground [X042.E]
No Replace the ground module
Yes Go to step 1.185.9
No See 1.46 BLAM CAN COMMUNICATIONS LOST
on Pg. 48
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