Aux/Hitch/Pto Fault Code 11 - New Holland T8010 Manual

AUX/Hitch/PTO Controller is Disconnected from Can Bus
Cause:
AUX/Hitch/PTO controller has found that is cannot communicate with the Tractor Data Bus.
Possible failure modes:
1. Tractor Data Bus does not have power or ground.
2. Tractor Data Bus is shorted to power or ground.
3. Resistor Terminator failed.
4. AUX/Hitch/PTO controller failed.
Solution:
Make sure the AUX/Hitch/PTO controller and Tractor Data Bus are functioning properly.
1. Check the connection to the AUX/Hitch/PTO controller.
A. Make sure connector C053 is firmly connected to the AUX/Hitch/PTO controller (right center connector).
B. Make sure the AUX/Hitch/PTO controller has a good connection to the TDB. With the key switch in the ON
position and connector C053 disconnected, measure the voltage between the TDB high and low wires and
clean ground. TDB high (cavity 15) should measure from 2.5 to 2.8 volts. TDB low (cavity 16) should
measure from 2.2 to 2.5 volts.
a) If both voltages are within specification and no other controllers show communication fault codes
(except the AUX/Hitch/PTO controller) then clear the fault code. If the fault code returns, then replace
the controller.
b) If both voltages are zero, go to Step 2.
c) If the voltages are low or high, go to Step 3.
NOTE: Check the Tractor Data Bus wiring from Splice CHA2 to connector C335 and onto connector C053 at AUX/
Hitch/PTO Controller for damage, etc. before testing the entire data bus. Gently pull on the TDB high and low wires
in cavities 15 and 16 to ensure that the terminals are fully seated and wires are not broken.
2. Check the power supply to the Tractor Data Bus.
A. Check fuse #42.
B. Turn the tractor key switch to the ON position. Verify approximately 12 volts power at fuse #42. If no power,
check the power supply to the key switch power stud.
3. Check the Tractor Data Bus at the can bus resistor terminators.
The following checks are performed looking into one end of the data bus and checking the resistor terminator
at the other end.
A. Check from the can bus resistor terminator at the engine. Raise the tractor hood. The resistor terminator is
located in harness that leads into Buss box. Disconnect the terminator plug at connector C205. With the
key switch in the ON position, measure the voltage on each pin to ground on connector C205.
At cavity A, the yellow wire, it should read from 2.5 to 2.8 volts.
At cavity B, the green wire, it should read from 2.2 to 2.5 volts.
If the above checks are ok and all controllers came online, it means that the opposite end resistor
terminator and the data bus wiring are functioning correctly. The engine end resistor terminator has most
likely failed. Test the engine end resistor terminator and replace if it has failed. See step 4.
B. Check from the can bus resistor terminator in the AUX/Hitch/PTO controller.
Reconnect the engine end resistor terminator and disconnect the AUX/Hitch/PTO controller connector
C053.
With the key switch to OFF, then to ON. Measure the voltage between the following cavities at connector
C053.
At cavity 15, the yellow wire, it should read from 2.5 to 2.8 volts.
At cavity 16, the green wire, it should read from 2.2 to 2.5 volts.
If the above checks are ok and all controllers came online, it means that the engine end resistor
terminator and the data bus wiring are functioning correctly. The AUX/Hitch/PTO controller resistor
terminator has most likely failed. Test the AUX/Hitch/PTO resistor terminator and replace if it has failed.
Section 55 - Electrical System, Controller - Chapter 3

AUX/HITCH/PTO FAULT CODE 11

55-3-11