Oil Pressure Short To Ground; Parking Brake Open Circuit; Parking Brake Short To Battery; Parking Brake Short To Ground - JLG 1250AJP Troubleshooting Manual

SECTION 1 - FAULT DICTIONARY AND SELECTED TROUBLESHOOTING

1.239 OIL PRESSURE SHORT TO GROUND

Flash Code: 4-3
Oil pressure short to ground. This fault should only occur on machines configured with non-ECM engines. The engine oil
pressure input [X001.15] is shorted to ground. See 1.378 COMMON STG PROCEDURE on Pg. 175.

1.240 PARKING BRAKE OPEN CIRCUIT

Flash Code: 3-3
Parking brake open circuit. The parking brake output [X001.23] is open. See 1.377 COMMON STB OR OC PROCEDURE on
Pg. 174.

1.241 PARKING BRAKE SHORT TO BATTERY

Flash Code: 3-3
Parking brake short to battery. The parking brake output [X001.23] is shorted to battery. See 1.377 COMMON STB OR OC
PROCEDURE on Pg. 174.

1.242 PARKING BRAKE SHORT TO GROUND

Flash Code: 3-3
Parking brake short to ground. The parking brake output [X001.23] is shorted to ground. See 1.378 COMMON STG PRO-
CEDURE on Pg. 175.

1.243 PLATFORM CAN COMMUNICATIONS LOST

Flash Code: 6-6
Platform CAN communications lost. The system cannot communicate with the platform module. This may be due to wiring
problems between platform and ground modules.
Note Pretest Instructions
1.243.1 Check fault log for other
modules having lost com-
munication
1.243.2 Disconnect the platform
module J8 connector
[X170]. Turn machine on in
platform mode
1.243.3 Disconnect the platform
module J8 connector
[X170]. Turn machine on in
platform mode
1.243.4 Remove any corrosion on
battery terminals and bat-
tery cable terminals. Run
machine to recharge battery.
1.243.5 Turn machine on in platform
mode. Backprobe to take the
following measurement.
See Backprobing on Pg.
319 for details.
1.243.6 Disconnect boom sensor
passthru - 19 position con-
nector [X050]
1-122
Test
Have most modules lost communications?
Is there 11VDC or more between socket 2 and
socket 1 of the platform module J8 connector
[X170.2.soc X170.1.soc]?
Is there zero VDC between socket 2 and socket
1 of the platform module J8 connector
[X170.2.soc X170.1.soc]?
Does battery still exhibit low power?
Is there 11VDC or more between terminal 12
and terminal 16 of the 19 position platform
control box passthru connector [X160.12
X160.16]?
Turn machine on in platform mode. Is there
11VDC or more between socket 12 and socket
16 of the boom sensor passthru - 19 position
connector [X050.12.soc X050.16.soc]?
1250AJP
Result Corrective Action
Yes See 1.93 EXCESSIVE CAN BUS COMMUNICA-
TION ERRORS on Pg. 73
No Go to step 1.243.2
Yes See 1.93 EXCESSIVE CAN BUS COMMUNICA-
TION ERRORS on Pg. 73 fault step 1.93.3
No Keep machine on. Go to step 1.243.3
Yes Keep machine on. Go to step 1.243.5
No Go to step 1.243.4
Yes Replace battery
No Retry normal vehicle operation
Yes Repair/replace harness between the 19 position
platform control box passthru connector [X160]
and the platform module J8 connector [X170]
No Go to step 1.243.6
Yes Repair/replace harness between the boom sen-
sor passthru - 19 position connector [X050] and
the 19 position platform control box passthru
connector [X160]
No Go to step 1.243.7
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