New Holland T8010 Manual page 1638

Controller Memory Error
Cause:
Controller failure: Loss of trans switches configuration.
Possible failure mode:
Memory defect or intermittent controller.
Solution:
Make sure the controller has a good connection (C137) to the battery and is properly grounded.
Shut down the tractor and restart. Calibrate the TRANS menu in the armrest controller. If the same fault code
appears again, replace the controller.
NOTE: See schematic sections 47 and 48 on schematic poster.
Hitch Position Command Potentiometer Calibration Error
Cause:
Hitch position command potentiometer calibration results not acceptable.
Possible failure mode:
1. Calibration was done incorrectly.
2. Hitch position command potentiometer or the lever are out of the working range.
3. Memory defect or intermittent controller.
Solution:
Make sure the controller has a good connection (C137) to the battery and is properly grounded.
1. Shut down the tractor and restart. Calibrate the hitch menu in the armrest controller. Make sure the calibration
is done with the proper procedures.
2. If the same fault code appears again, check the hitch position command potentiometer and the lever for any
defect.
Refer to Fault Code ARM 69 for diagnosing procedures details.
3. Calibrate the hitch menu in the armrest controller again. If the same fault code appears again, replace the
controller.
NOTE: See schematic sections 47 and 48 on schematic poster.
Section 55 - Electrical System, Controller - Chapter 5
FAULT CODE ARM 9015
FAULT CODE ARM 9021
55-5-33