Aux/Hitch/Pto Fault Code 22 - New Holland T8010 Manual

Single Draft Pin Sensor Failed When Configured For One Draft Pin Sensor
Cause:
The hitch controller has detected a problem with the draft pin signal.
Possible failure modes:
1. Draft pin failed.
2. Wiring problem from the hitch controller to the draft pin.
If the problem is intermittent the draft function is disabled until the next engine start up.
Solution:
The most effective way of troubleshooting is to use a Y harness to measure the pin signal. The draft pin signal can
also be monitored with the service tool. Another way is to check the pin function or the pin wiring directly.
1. Use a Y harness:
Plug in the Y harness at the draft pin connector. Cavity A is the ground, Cavity B is the draft pin signal, and
Cavity C is the power supply (+8 VDC).
a) Check the power supply at Cavity C. If the +8 VDC does not present, check the wiring from draft pin to Pin 1
of C059.
b) Check the function of the draft pin.
Replace the pin in any of the following cases:
No signal output.
Signal not within 2.95 to 3.05 when there is no load.
The output does not change with the load change.
2. Use the service tool:
Go to the Monitor screen by click the Monitor Icon.
Click the CHANGE PARAMETER SELECTIONS Icon.
Click the HITCH DRAFT PIN-RIGHT-VOLTAGE and then ADD. You will be able to monitor the draft pin signal
status on the screen.
The voltage should be 2.95 to 3.05 when there is no load.
The voltage should change with the load change in the range of 2.3 to 5.3 VDC at -60 KN to 160 KN.
3. Check the function of the draft pin.
a) If a spare draft pin is available, unplug the pin connector. Plug in the new pin, clear the fault codes, start the
tractor, and enable hitch. Lower and raise the hitch a few times.
If the fault code is not recorded, the draft pin failed.
If the fault code is recorded again, check the wiring.
4. Check the wiring from the hitch controller to the draft pin.
a) Disconnect the pin connector. At the controller side, check the power supply across Cavity C and A. It should
be 8 volts.
b) Check the continuity from draft pin connector to C057 and ground wire to C053.
c) At the draft pin side, measure the continuity of the pin circuit. The resistance should be 180 kohm across A
and C and 18 kohm across B and C.
NOTE: Always inspect connector ends for damaged, bent or dislocated pins when troubleshooting.
NOTE: The resistances at the draft pin side are for reference only. Incorrect resistance means bad pin but some
bad pins may have correct resistances.
NOTE: See schematic sections 51 and 52 on the schematic poster.
Section 55 - Electrical System, Controller - Chapter 3

AUX/HITCH/PTO FAULT CODE 22

55-3-19