Front Left Wheel Sensor Out Of Range High - JLG 1250AJP Troubleshooting Manual

SECTION 1 - FAULT DICTIONARY AND SELECTED TROUBLESHOOTING

1.97 FRONT LEFT WHEEL SENSOR OUT OF RANGE HIGH

Flash Code: 8-6
Front left wheel sensor out of range high. The control system detected the front left steer angle sensor value was above the
electrical maximum. This may be due to a short to battery or a wiring problem.
Note Pretest Instructions
1.97.1
1.97.2 Extend axles. Enable crab
steering mode. Go to ANA-
LYZER ⇒ DIAGNOSTICS ⇒
DRIVE ⇒ L FRONT WHEEL
ANGL.
1.97.3 Swap front left wheel sensor
[X203] with a sensor that
doesn't have a fault.
1.97.4
1.97.5 Disconnect front left wheel
sensor [X203]
1.97.6 Disconnect front left wheel
sensor [X203] and chassis
module J3 [X231]
1.97.7 Disconnect front left wheel
sensor [X203] and front left
steer passthru - 4 pos.
[X202]
1.97.8 Disconnect front left steer
passthru - 4 pos. [X202].
Turn on machine.
1.97.9 Disconnect chassis module
J3. Turn on machine.
1-80
Test
Is the front left steer angle sensor [X203]
installed and connected properly?
Observe angle while operating steering. Steer
fully to the left. Check all wheel angles. They
should be within 2 °. Return to L FRONT
WHEEL ANGL analyzer screen. Steer to right
about two seconds while monitoring the value.
Repeat checks. Repeat process for entire
swing of wheel. Did the value, while steering,
pause, jump or act erratically? -OR- Was the
left front wheel angle more than 2° difference
from other wheels?
Check faults. Does the new location now have
a wheel sensor out of range high fault?
Calibrate steering. Does fault clear?
Turn on machine. Is there 5VDC between front
left wheel sensor socket A [X203.A.soc] and
socket C [X203.C.soc]?
Is there continuity between front left wheel
sensor socket B [X203.B.soc] and chassis
module J3 socket 5 [X231.5.soc]?
Is there continuity between front left wheel
sensor socket B [X203.B.soc] and front left
steer passthru pin 2 [X202.2.pin]?
Is there 5VDC between front left steer passthru
socket 1 [X202.1.soc] and socket 3
[X202.3.soc]?
Is there 5VDC between chassis module J3 pin
4 [X231.4.pin] and pin 6 [X231.6.pin]?
1250AJP
Result Corrective Action
Yes Go to step 1.97.2
No Repair as needed
Yes Go to step 1.97.3
No Go to step 1.97.5
Yes Replace sensor originally at the front left wheel.
No Go to step 1.97.4
Yes Troubleshooting complete
No Go to step 1.97.5
Yes Keep sensor disconnected.
Go to step 1.97.6.
No Go to step 1.97.8
Yes Reprogram/replace ground module
No Keep front left wheel sensor [X203] discon-
nected.
Go to step 1.97.7
Yes Repair harness between front left steer passthru
socket 2 [X202.2.soc] and chassis module J3
socket 5 [X231.5.soc]
No Repair/replace harness between front left wheel
sensor socket B [X203.B.soc] and front left steer
passthru pin 2 [X202.2.pin]
Yes Repair/replace harness between front left steer
passthru [X202] and front left wheel sensor
[X203]
No Go to step 1.97.9
Yes Repair/Replace harness between front left steer
passthru [X202] and chassis module J3 [X231]
No Replace chassis module
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