Platform Sensor Ref Voltage Out Of Range - JLG 1250AJP Troubleshooting Manual

SECTION 1 - FAULT DICTIONARY AND SELECTED TROUBLESHOOTING

1.249 PLATFORM SENSOR REF VOLTAGE OUT OF RANGE

Flash Code: 9-9
Platform sensor reference voltage out of range. The platform module 7VDC reference voltage is out of acceptable range.
This supply is used for the lift, swing, drive and pump controls.
Note Pretest Instructions
1.249.1 Disconnect platform mod-
ule J5 [X167]
1.249.2 Disconnect platform mod-
ule J5 [X167] and J6 [X168]
and hyd speed pot passthru
- 6 pos [X199]. Turn on
machine.
1.249.3 Disconnect platform mod-
ule J5 [X167]. Ground multi-
meter. See Grounding on
Pg. 319 for details.
1.249.4 Disconnect platform mod-
ule J5 [X167]. Ground multi-
meter. See Grounding on
Pg. 319 for details.
1.249.5 Disconnect platform mod-
ule J6 [X168]
1.249.6 Disconnect platform mod-
ule J6 [X168]. Ground multi-
meter. See Grounding on
Pg. 319 for details.
1.249.7 Disconnect platform mod-
ule J6 [X168]. Ground multi-
meter. See Grounding on
Pg. 319 for details.
1.249.8 Disconnect hyd speed pot
passthru - 6 pos. [X199]
1.249.9 Disconnect hyd speed pot
passthru - 6 pos. [X199].
1.249.10 Disconnect hyd speed pot
passthru [X199] and plat-
form module J1 [X165].
1-124
Test
Is there about 2.5kΩ between platform mod-
ule J5 socket 1 [X167.1.soc] and J5 socket 7
[X167.7.soc]?
Is there 6.6V - 7.5V between platform module
J5 pin 1 [X167.1.pin] and J5 pin 7
[X167.7.pin]?
Is there a short between platform module J5
socket 1 [X167.1.soc] and ground?
Turn on machine. Is there about 12 VDC
between platform module J5 socket 1
[X167.1.soc] and ground?
Is there about 5kΩ between platform module
J6 socket 1 [X168.1.soc] and J6 socket 7
[X168.7.soc]?
Is there a short between platform module J6
socket 1 [X168.1.soc] and ground?
Turn on machine. Is there about 12 VDC
between platform module J6 socket 1
[X168.1.soc] and ground?
Measure resistance between hyd speed pot
passthru socket 4 [X199.4.soc] and socket 5
[X199.5.soc]. Is there a short or open?
Measure resistance from hyd speed pot
passthru pin 4 [X199.4.pin] and pin 5
[X199.5.pin]. Is there a short?
Measure resistance from platform module J1
socket 13 [X165.13.soc] and socket 34
[X165.34.soc]. Is there a short?
1250AJP
Result Corrective Action
Yes Keep connector disconnected.
Go to step 1.249.2.
No Repair/replace Lift & Swing joystick assembly
and/or wiring
Yes Keep J5 [X167] disconnected.
Go to step 1.249.3.
No Go to step 1.249.12
Yes Repair/replace harness affecting Lift & Swing
joystick wiring.
No Go to step 1.249.4
Yes Short to battery. Repair/replace harness affecting
the Lift & Swing joystick wiring.
No Go to step 1.249.5
Yes Go to step 1.249.6
No Repair/replace Drive joystick and/or wiring
Yes Short to ground. Repair/replace harness affect-
ing Drive joystick assembly.
No Go to step 1.249.7
Yes Short to battery. Repair/replace harness affecting
Drive joystick wiring.
No Go to step 1.249.8
Yes Repair/replace hyd speed pot passthru [X199]
and or Speed Controller [X192]
No Keep hyd speed pot passthru [X199] discon-
nected.
Go to step 1.249.9
Yes Keep hyd speed pot passthru [X199] discon-
nected.
Go to step 1.249.10
No Keep hyd speed pot passthru [X199] discon-
nected.
Go to step 1.249.11
Yes Repair/replace harness between hyd speed pot
passthru [X199] pin 4 [X199.4.pin] and pin 6
[X199.6.pin] and platform module J1 [X 165]
socket 13 [X165.13.soc] and socket 34
[X165.34.soc]
No Short inside module. Replace platform module
3128411