Main Angl2 Invalid Angle - JLG 1250AJP Troubleshooting Manual

Note Pretest Instructions
1.187.9 Disconnect CAN 3 way - to
platform [X270], CAN 3 way
- to BLAM [X269] and
ground module J7
1.187.10 Swap the right main boom
angle sensor 1 with t he left
main boom angle sensor 2,
plugging the right harness
plug [X048] into the left sen-
sor [X049]

1.188 MAIN ANGL2 INVALID ANGLE

Flash Code: 8-4
Main angle sensor 2 (left) invalid angle. The left main boom angle sensor #2 is reading an angle less than 3° or greater than
177°. The control system is able to communicate with this sensor over the CAN bus, but the value returned from the sensor
is outside of the allowed range. When fully stowed, the screen ANALYZER ⇒ ACCESS LEVEL 1 ⇒ DIAGNOSTICS ⇒ BOOM
SENSORS ⇒ MAIN LIFT 2 ANGLE A/D: XXXX should show between 5 and 25.
Note Pretest Instructions
1.188.1 Examine fault log
1.188.2
1.188.3 Retract and lower boom
completely
1.188.4 Remove sensor coupler
1.188.5
1.188.6
3128411
SECTION 1 - FAULT DICTIONARY AND SELECTED TROUBLESHOOTING
Test
Is there CAN HI continuity between CAN 3 way
- to platform pin A [X270.A.pin] and socket 13
of the ground module J7 connector
[X007.13.soc] also CAN LO continuity
between CAN 3 way - to platform pin B
[X270.B.pin] and socket 24 of the ground
module J7 connector [X007.24.soc]? -AND-
Is it open between CAN 3 way - to platform pin
A [X270.A.pin] and CAN 3 way - to platform
pin C [X270.C.pin]? -AND- Is it open between
CAN 3 way - to platform pin B [X270.B.pin]
and CAN 3 way - to platform pin C
[X270.C.pin]
Does this fault still occur?
Test
Does the fault EXCESSIVE CAN BUS COMMU-
NICATION ERRORS appear?
Examine the coupling, clamps, rotary sensor,
mounting blocks and the cross bolt in the main
boom pivot pin for loose hardware or damage.
Is there any? See Figure 2-5. Boom Area Con-
nectors on Pg. 185 for details.
Is the timing mark for the sensor in the proper
place? See Figure 2-5. Boom Area Connectors
on Pg. 185 for details.
Is it between 2.6 and 2.8 inches?
Perform boom calibration. Does it pass?
Manually adjust angle sensor that failed cali-
bration previous in step. Perform boom cali-
bration. Does it pass?
1250AJP
Result Corrective Action
Yes Go to step 1.187.10
No Repair/replace the RED, BLACK, and Shield
wires, harness and/or CAN 3-way between the
CAN 3 way - to platform pin A,B,C [X270.A.pin
X270.B.pin X270.C.pin] and the ground module
J7 connector [X007.13 X007.24 X007.18]. See
step 1.93.14 of 1.93 EXCESSIVE CAN BUS
COMMUNICATION ERRORS on Pg. 73
Yes Check the connections at the right main boom
angle sensor 2 connector [X049] and see 1.93
EXCESSIVE CAN BUS COMMUNICATION
ERRORS on Pg. 73
No Repair/replace the sensor that was originally
installed on the left [X049]. Re-calibration of the
boom sensors will be necessary
Result Corrective Action
Yes Trouble shot that fault first.
No Go to step 1.188.2
Yes Repair as needed
No Go to step 1.188.3
Yes Go to step 1.188.4
No Re-align mark on shaft to the mark on the face
near "L", for left side, on label. It is on the same
side as the connector. See Figure 2-5. Boom Area
Connectors on Pg. 185. Go to step 1.186.5.
Yes Go to step 1.188.5
No Replace any coupler outside the given length
Yes Troubleshooting complete
No Go to step 1.188.6
Yes Troubleshooting complete
No Repeat this step. If a sensor cannot be adjusted or
continually falls outside of calibration replace
sensor.
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