Basket Leveling Tilt Sensor 2 Communications Lost - JLG 1250AJP Troubleshooting Manual

1.31 BASKET LEVELING TILT SENSOR 2 COMMUNICATIONS LOST

Flash Code: 8-3
Basket leveling tilt sensor 2 communications lost. The control system lost serial communications with platform tilt angle sen-
sor #2 (Left).
Note Pretest Instructions
1.31.1
1.31.2 Check the faults.
1.31.3 Plug platform level sensor 1
(right) [X150] into connec-
tor for platform level sensor
2 (left) [X148]
1.31.4 Disconnect platform level
sensor 2 (left) [X148]. Turn
on machine.
1.31.5 Disconnect platform level
sensor 2 (left) [X148] and
platform module J1
1.31.6 Disconnect platform level
passthru 2 [X163] and plat-
form module J1 [X165]
1.31.7 Disconnect platform mod-
ule J2 [X166]. Ground
meter. See Grounding on
Pg. 319 for details.
1.31.8 Disconnect platform level
passthru 1 [X162]. Turn on
machine.
1.31.9 Take the following measure-
ment by backprobing. See
Backprobing on Pg. 319 for
details.
1.31.10 Turn on machine.
3128411
SECTION 1 - FAULT DICTIONARY AND SELECTED TROUBLESHOOTING
Test
Is harness from platform level sensor 2 [X148]
plugged into the platform level passthru 2
[X163]? Also, are those connections in good
condition?
Is the fault BASKET LEVELING TILT SENSOR 1
COMMUNICATIONS LOST active?
Does the BASKET LEVELING TILT SENSOR 2
COMMUNICATIONS LOST fault clear?
Measure voltage between platform level sen-
sor 2 pin1[X148.1.pin] and pin 3
[X148.3.pin]. Does it measure about 12VDC?
Is there continuity between platform level sen-
sor 1 pin 2 [X148.2.pin] and platform module
J1 socket 26 [X165.26.soc]?
Is there continuity between platform level
passthru 2 pin 5 [X163.5.pin] and platform
module J1 socket 26 [X165.26.soc]?
Turn on machine. Measure voltage between
platform module J2 pin 32 [X166.32] and
ground. Does it measure about 12VDC?
Measure voltage between platform level
passthru 1 pin 1 [X162.1.pin] and pin 3
[X162.3.pin]. Does it measure about 12VDC?
Is there about 12 VDC between platform mod-
ule J2 terminal 32 [X166.32] and platform
module J7 terminal 21 [X169.21]?
Measure voltage between platform level sen-
sor 1 pin 1 [X150.1.pin] and pin 3
[X150.3.pin]. -AND- measure voltage
between platform level sensor 2 pin 1
[X148.1.pin] and pin 3 [X148.3.pin]. Do they
measure about 12 VDC?
1250AJP
Result Corrective Action
Yes Go to step 1.31.2
No Correct wiring
Yes Go to step 1.31.9
No Go to step 1.31.3
Yes Replace original platform level sensor 2 (left)
[X148]
No Go to step 1.31.4
Yes Go to step 1.31.5
No Go to step 1.31.7
Yes Replace platform level sensor 2 (left) [X148]
No Go to step 1.31.6
Yes Repair/replace harness between platform level
passthru 2 [X163] and platform level sensor 2
(LEFT) [X148]
No Repair/replace harness between platform level
passthru 2 [X163] and platform module J1
[X165]
Yes Go to step 1.31.8
No Replace platform module
Yes Repair/replace harness between platform level
passthru 1 [X162] and platform level sensor 1
[X150]
No Repair/replace harness between platform level
passthru 1 [X162] and platform module J7
[X169] and/or J1 [X165]
Yes Go to step 1.31.10
No Replace platform module
Yes Go to step 1.31.12
No Go to step 1.31.11
1-43