John Deere 4310 EHydro alert light flashes

[Keweenaw4310]

Ever since day 1 my 4310 flashed a sequence on the alert light if I try to pull the C range to travel somewhere.

Three short and one long (3 short 1 long) is the flashing sequence. Let up on the pedal and it clears. Take it slow and it doesn't come on - try to bring up the speed and it starts flashing. Tractor still works fine in all other respects.

Manual states that tractor can be used but contact JD dealer to figure out what sequence means. My dealer said he'd open a case with JD but never did. 1 year later and I finally pushed him to get a case open. 4 pages worth of data came back from John Deere tech support.
He wants me to stop by and read it. He's a one may show at his shop, so I end up doing all the work on my own tractor. Looks like warranty work will be no exception. I'm not knocking him by any means. He's a good friend of mine and that's just how we work it.

When I figure out what's causing this I'll update this thread. May proove to be informative to other Ehydro owners. I don't believe this is specific to the 4310. His information states that this problem is known to exist even on the 110 construction machines. So yellow and greed John Deere's must share some of the same Ehydro parts & controllers.

I've ordered a tech manual on CD for the 4210,4310 and 4410. John Deere tech manual is $115.00 on CD.

[WNYTractorTinkerer]

Mine is giving me trouble too.. Sometime soon I'm gonna replace the hydro fluid/filter to see if that resolves the problem. Mine flashes and completely shuts down no matter what is going on.. Laid some piles of tire on the side of the road once and it is quite scary.. Mine is out of warranty so I'm kinda screwed as to repairs since money's been tight.. Please let me know what you find out..:Disgus:

[PaulChristenson]

http://tractorforum.com/showthread.php?threadid=10847
Flash Sequence...3, • • • -
During Normal operation:
FAULT CAUSE
Voltage signal is out of
range.
Input is not calibrated.

MACHINE RESPONSE
Load Match is disabled;
loss of performance.
RESET ACTION
Power recycled through off
to clear error status.
Sensor has to be recalibrated.

During Calibration Routine:
FAULT CAUSE
Voltage signal is out of
range.
MACHINE RESPONSE
Calibration routine
stops.

RESET ACTION
Power recycled through off
to clear error status.
Calibration repeated after
signal is back within range.


eHydro - Throttle Position Potentiometer Test

Reason:To verify the throttle position potentiometer for proper
voltage with the throttle in the low and high idle positions.

Equipment
• JDG1575 Test Kit

Procedure:
1. Park machine safely in neutral with park brake locked.
2. Remove the right side cowl panel.
3. Inspect the linkage between throttle lever and
potentiometer for wear, damage or looseness. Repair or
replace as needed.
MX17140
4. Connect the red lead to the volt, ohms, Hz input jack (A)
of the multimeter and the voltage A terminal (B) of the
breakout box.
5. Connect the black lead to the com input jack (C) of the
multimeter and the voltage C terminal (D) of the breakout
box.
6. Connect the 3 pin extender harness (E) into the 3 pin
connector (F) of the breakout box.
7. Set the multimeter to the DCV position (G).
8. Set breakout box switch to off position (H).
MX9835
9. Connect the position sensor Y connector (I) between the
throttle position potentiometer (J), the machine wiring
harness (K), and the extender harness (L).
10.Turn the key switch to the run position.
11.The input voltage should be within specification. If not,
See “Power Circuit Operation” on page 158.
MX17141
12.Move the red lead on the breakout box from the A
terminal to the B terminal (M).
13.Set throttle to low idle position.
14.The low idle voltage should be within specification. If
not, adjust potentiometer.
15.Set throttle to high idle position.
16.The high idle voltage should be within specification. If
the voltage is within specification, calibrate the throttle
position potentiometer. If not, replace and adjust the throttle
position potentiometer.
17.Turn the key switch to the off position.
18.Unplug the position Y connector from the machine
wiring harness and the throttle potentiometer.
19.Connect the machine wiring harness to the throttle
potentiometer.
20.Install the right side cowl panel.
Specification:
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . 5.0 ± 0.2 volts
Low Idle Position Signal Voltage. . . . . . . . 0.4 - 1.0 volts
High Idle Position Signal Voltage . . . . . . . 3.2 - 4.5 volts



eHydro - Throttle Position Potentiometer Adjustment and Calibration

Reason:To adjust the throttle position potentiometer for the proper
voltage with the throttle lever in the low and high idle
positions.

Equipment:
• JDG1575 Test Kit

Adjustment Procedure:
1. Park machine safely in neutral with park brake locked.
2. Remove the right side cowl panel.
3. Inspect the linkage between throttle lever and
potentiometer for wear, damage or looseness. Repair or
replace as needed.
4. Connect the red lead to the volt, ohms, Hz input jack (A)
of the multimeter and the voltage B terminal (B) of the
breakout box.
5. Connect the black lead to the com input jack (C) of the
multimeter and the voltage C terminal (D) of the breakout
box.
6. Connect the 3 pin extender harness (E) into the 3 pin
connector (F) of the breakout box.
7. Set the multimeter to the DCV position (G).
8. Set breakout box switch to the off position (H).
9. Connect the position sensor Y connector (I) between the
throttle position potentiometer (J), the machine wiring
harness (K), and the extender harness (L).
10.Turn the key switch to the run position.
11.Loosen the lock nuts (M) enough that the potentiometer
will stay in place without turning, but can be rotated by
hand.
12.Set the throttle to the low idle position.
13.Rotate the potentiometer until the meter reading is
within specification.
14.With the calibration kit still attached, tighten the two nuts
to specification, being sure that the voltage reading does
not change.
15.Set the throttle to the high idle position.
16.The high idle voltage should be within specification. If
the voltage is within specification, calibrate the throttle
position potentiometer. If not, replace and adjust the throttle
position potentiometer.
Specification:
Low Idle Position Signal Voltage. . . . . . . . 0.8 ± 0.1 volts
High Idle Position Signal Voltage . . . . . . . 3.8 - 4.5 volts
Lock Nut Torque . . . . . . . . . . . . . . . 3.4 N•m (30.0 lb-in.)
Calibration Procedure:
1. Turn key switch to the off position.
2. Unplug the position Y connector from the machine
wiring harness and the throttle potentiometer.
3. Connect the machine wiring harness to the throttle
potentiometer.
4. Set the throttle lever to the low idle position.
5. Turn the key switch to the run position.
MX10694
6. The fault light (N) should display the 3 short and 1 long
flash (• • • -) fault code.
7. Wait 5 seconds then move the throttle lever to the high
idle position.
8. After 5 seconds the fault light should turn off.
9. When the flash code ends the throttle position
potentiometer is calibrated.
10.Install the right side cowl panel.