Aux/Hitch/Pto Fault Code 14 - New Holland T8010 Manual

A. If none of the controllers come back on line, the problem is inside the cab. Check the Data bus wiring in
the cab for open circuits or shorts to ground. If the problem cannot be found in the wiring, disconnect each
controller one at a time to determine if one of the controllers has failed.
B. If all of the controllers except the engine controller come back online, the problem is the Data Bus external
to the cab. Check the Data bus wiring outside of the cab for open circuits or shorts to ground. The Data
bus can be split once again at connector C060 to determine which portion of the exterior Data bus wiring
has the problem. If the problem cannot be found in the wiring, disconnect the engine controller to
determine if it has failed.
NOTE: Always inspect connector ends for damaged, bent or dislocated pins when troubleshooting the Data Bus.
One intermittent connection can cause the entire bus to stop communications.
NOTE: Also see the Data Bus schematic foldouts 12 through 18 on the schematic poster.
5 Volt Reference is Above the Upper Voltage Limit
Cause:
The 5 volt reference voltage is monitored and is consistently greater than 5.8 volts.
Possible failure mode:
1. Short circuit to 8 or 12 volt power source.
Solution:
1. Turn the key switch ON. Disconnect connector C055 (center left) on the AUX/Hitch/PTO controller. Use a
multimeter to check the voltage from pin 23 on the controller to ground.
A. It should read approximately 5 volts. If the reading is good go to step 2.
B. If the reading is above 5.8 volts replace the controller.
2. Connect C055 back onto the AUX/Hitch/PTO controller. Locate connector C150 (6 pin) at the rear of the tractor,
near the AUX/Hitch/PTO connector. Remove the plug if the connector is not in use. Use a multimeter to check
the voltage from pin 2 on the controller to ground.
A. It should read approximately 5 volts. If the reading is good erase fault code. If the fault code returns it may
be a intermittent short in harness between connectors C150 and C055.
B. If the reading is above 5.8 volts there is a short to power somewhere between connector C150 and
connector C055 at the AUX/Hitch/PTO controller. Locate and repair the short.
Section 55 - Electrical System, Controller - Chapter 3

AUX/HITCH/PTO FAULT CODE 14

55-3-14