New Holland T8010 Manual page 1537

Clutch Position Sensor Not Agree With BOC Switch
Cause:
The position sensor of the inching clutch pedal does not agree with the bottom of clutch (BOC) switch.
Possible failure mode:
1. Mechanical misadjusted inching pedal, its position potentiometer, or BOC switch.
2. Bottom of clutch switch, its relay, or their wiring failure.
3. Inching pedal position potentiometer or its wiring failure.
Solution:
Check the inching pedal, its position potentiometer, and the BOC switch assembly. Make sure the mechanical
installation is proper and tight.
The clutch (inching) pedal position potentiometer is mounted on side of the inching pedal. The bottom of clutch
switch is mounted on top of the inching pedal. Both are wired to the transmission controller. The transmission
controller monitors the on/off status of the bottom of clutch switch and the position of the inching pedal. When the
inching clutch pedal is fully depressed, the BOC switch should be off. When inching pedal is above a certain height,
the BOC switch should be on. If the position of the inching clutch pedal and the status of the bottom of clutch switch
does not work as specified above, this fault code will be generated.
1. Monitor and test the function of the pedal position potentiometer and the bottom of clutch switch.
The position of the inching clutch pedal and the status of the bottom of clutch switch can be monitored through
the TRANS VIEW of the instrumentation cluster or the monitor screen of the service tool.
The position display should be 100% when the clutch is fully up and 0% when the pedal is fully depressed.
The number should smoothly drop as the clutch pedal is depressed.
The bottom of clutch switch will only be displayed as on if the transmission control relay and neutral relay have
pulled in and the inching clutch is in the bottom of clutch position.
Enter TRANS VIEW or the monitor screen. Watch the display while slowly cycle the inching pedal.
If the position display of the inching pedal does not work as specified, go to step 2.
If the status display of the bottom of clutch switch does not work as specified, go to step 5.
2. Test the function of the pedal position potentiometer.
In the TRANS VIEW or the monitor screen:
If the number change follows the pedal movement smoothly but does not reach the 0%, the potentiometer and
its wiring are working OK.
If the numbers are hard to control or do not fall in sequential order, replace the pedal position potentiometer.
If numbers on display are locked up and will not change when clutch pedal is cycled, go to step 3 and 4.
3. Test the pedal position potentiometer and its wiring.
Remove the rear controller cover.
Disconnect connector C010.
Measure the resistance at the potentiometer side.
The resistance between pin 38 and pin 39 must be around 4 K ohms.
The resistance must increase smoothly between pin 40 and pin 39 as clutch pedal in depressed.
The resistance must decrease smoothly between pin 40 and pin 39 as clutch pedal in released.
If the potentiometer works as specified above, go to step 5.
If the potentiometer does not work as specified above, repeat same testing procedures at connector C052.
If the potentiometer still does not work as specified above, replace the potentiometer. Otherwise check the
wiring.
4. Test the transmission controller and the wiring.
Test the controller side at C010.
The power supply voltage from the controller at pin 38 should be around 8 VDC.
Section 55 - Electrical System, Controller - Chapter 4
FAULT CODE TRANS 47
55-4-10