Length Sensor Ref Voltage High; Length Sensor Ref Voltage Low; Lift Up & Tele Out Prevented - Platform Overloaded - JLG 1250AJP Troubleshooting Manual

SECTION 1 - FAULT DICTIONARY AND SELECTED TROUBLESHOOTING

1.161 LENGTH SENSOR REF VOLTAGE HIGH

Flash Code: 9-9
Length sensor reference voltage high. Supply voltage for the boom length sensors is above 5.5VDC. A power cycle is
required.
Note Pretest Instructions
1.161.1 Cycle power
1.161.2 Disconnect all on-board and
off-board optional power
systems such as 110VAC
and welders to keep them
from energizing
1.161.3 Disconnect BLAM J3
[X088]. Turn on machine.
1.161.4 Disconnect BLAM J3
[X088] and battery + termi-
nal [X116].

1.162 LENGTH SENSOR REF VOLTAGE LOW

Flash Code: 9-9
Length sensor reference voltage low. Supply voltage for the boom length sensors is below 4.5VDC. A power cycle is
required.
Note Pretest Instructions
1.162.1 Cycle power
1.162.2 Disconnect BLAM J3
[X088]. Turn on machine.
1.162.3 Disconnect BLAM J3
[X088]. Ground meter. See
Grounding on Pg. 319 for
details.
1.163 LIFT UP & TELE OUT PREVENTED - PLATFORM OVERLOADED
Flash Code: 8-2
Lift up & telescope out prevented - platform overloaded. Notification that the machine is configured with load system cut-
outs, the platform is overloaded, and lift up or tele out is selected. Lift up and telescope out are prevented while the platform
is overloaded.
1-94
Test
Did fault clear?
Did fault clear?
Is there between 5.5 VDC and 4.5 VDC mea-
sured between all of the following points on
BLAM J3:
pin 1 [X088.1.pin] to pin 3 [X088.3.pin];
pin 4 [X088.4.pin] to pin 6 [X088.6.pin];
pin 7 [X088.7.pin] to pin 9 [X088.9.pin];
pin 10 [X088.10.pin] to pin 12 [X088.12.pin]?
Is there a short between the battery (+) termi-
nal [X116] and any of the following: BLAM J3
socket 1 [X088.1.soc], socket 4
[X088.4.soc], socket 7 [X088.7.soc], or
socket 10 [X088.10.soc]?
Test
Did fault clear?
Is there between 5.5 VDC and 4.5 VDC mea-
sured between the following points on
BLAM J3:
pin 1 [X088.1.pin] to pin 3 [X088.3.pin];
pin 4 [X088.4.pin] to pin 6 [X088.6.pin];
pin 7 [X088.7.pin] to pin 9 [X088.9.pin];
pin 10 [X088.10.pin] to pin 12 [X088.12.pin]?
Is there a short between ground and any of the
following: BLAM J3 socket 1 [X088.1.soc],
socket 4 [X088.4.soc], socket 7
[X088.7.soc], or socket 10 [X088.10.soc]?
1250AJP
Result Corrective Action
Yes Troubleshooting complete
No Go to step 1.161.2
Yes Isolate system by turing on each optional power
system individually and checking fault. Then look
for shorts between length sensor harness and
faulty system harness.
No Go to step 1.161.3
Yes Go to step 1.161.4
No Replace BLAM
Yes Troubleshoot BLAM J3 [X088] harness wire(s)
with short
No Reprogram/replace BLAM
Result Corrective Action
Yes Troubleshooting complete
No Go to step 1.161.3
Yes Go to step 1.161.4
No Replace BLAM
Yes Troubleshoot BLAM J3 [X088] harness wire(s)
with short
No Reprogram/replace BLAM
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