Rt Rear Steer Rt Stb Or Oc; Rt Rear Steer Rt Stg; Running At Creep - Creep Switch Open - JLG 1250AJP Troubleshooting Manual

1.280 RT REAR STEER RT STB OR OC

Flash Code: 8-6
Right rear steer right short to battery or open circuit. The control system detected a short to battery or open circuit on the
chassis module right rear steer right valve output [233.5]. See 1.377 COMMON STB OR OC PROCEDURE on Pg. 174.

1.281 RT REAR STEER RT STG

Flash Code: 8-6
Right rear steer right short to ground. The control system detected a short to ground on the chassis module right rear steer
right valve output [233.5]. See 1.378 COMMON STG PROCEDURE on Pg. 175.

1.282 RUNNING AT CREEP - CREEP SWITCH OPEN

Flash Code: 9-9
Running at creep - creep switch open. All function speeds are limited to creep because the creep switch is open. This switch
is part of the hydraulic speed potentiometer operated by a knob on the platform console. The creep indicator will light when
in creep mode or blink in super creep mode. Circumstances that cause the machine to automatically enter creep/super
creep mode include encroachment of the operating envelope limit by tower or main boom, platform leveling fault, throttle
actuator failure, stowed basket, software version faults, boom sensor failures, hydraulic warm-up mode, and hydraulic or
electrical retrieval mode.
Note Pretest Instructions
1.282.1
1.282.2 Rotate function speed con-
trol knob fully CCW until it
clicks.
1.282.3
1.282.4 Disconnect hyd speed pot
passthru - 6 pos. [X199].
Ground meter. See Ground-
ing on Pg. 319 for details.
Turn on machine.
1.282.5 Disconnect hyd speed pot
passthru - 6 pos. [X199] and
platform module J1 [X165]
1.282.6 Disconnect hyd speed pot
passthru - 6 pos. [X199] and
platform module J1 [X165]
1.282.7 Turn on machine. Rotate
function speed control knob
CW 1/4 turn to 9 o'clock
position.
1.282.8 Turn on machine. Rotate
function speed control knob
CW 1/4 turn to 9 o'clock
position.
3128411
SECTION 1 - FAULT DICTIONARY AND SELECTED TROUBLESHOOTING
Test
Are any of the circumstances that cause creep
or super creep mode automatically present?
Is creep light on?
Watch creep light while turning on machine
from both the platform. Is creep light on for the
lamp check?
Is there about 12VDC at hyd speed pot
passthru socket 3 [X199.3.soc]?
Is there continuity between hyd speed pot
passthru socket 3 [X199.3.soc] and platform
module J1 socket 18 [X165.18.soc]?
Is there continuity between hyd speed pot
passthru pin 2 [X199.2.pin] and platform
module J1socket 32 [X165.32.soc]?
Does creep light turn off?
Does fault message clear?
1250AJP
Result Corrective Action
Yes Clear any condition present
No Go to step 1.282.2
Yes Go to step 1.282.7
No Go to step 1.282.3
Yes Go to step 1.282.4
No Replace LED light panel with light that is bad.
Yes Keep hyd speed pot passthru - 6 pos. [X199] dis-
connected.
Go to step 1.282.6
No Keep hyd speed pot passthru - 6 pos. [X199] dis-
connected.
Go to step 1.282.5
Yes Replace platform module
No Replace/repair harness between hyd speed pot
passthru socket 3 [X199.3.soc] and platform
module J1 socket 18 [X165.18.soc]
Yes Repair/replace hyd speed pot and/or harness
[X199]
No Repair/replace harness between hyd speed pot
passthru pin 2 [X199.2.pin] and platform module
J1socket 32 [X165.32.soc]
Yes Keep machine in same condition.
Go to step 1.282.8
No Go to step 1.282.9
Yes Normal operation. Troubleshooting complete.
No Reprogram/replace ground module
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