New Holland T8010 Manual page 1391

PTO Shaft Speed Sensor Failure
Cause:
The Data Bus signaled that the PTO shaft speed data is in error or not available from the AUX/HITCH/PTO
controller. The instrumentation controller receives the signal from the AUX/HITCH/PTO controller.
Possible failure modes:
1. The PTO shaft speed sensor failed in the AUX/HITCH/PTO controller (in most cases).
2. Software execution error in the AUX/HITCH/PTO controller (small chance).
PTO SHAFT SIZE SPEED SIGNAL
The PTO shaft speed frequency is derived from a variable reluctance speed sensor in the transmission. The clutch
speed sensor is connected directly to the AUX/HITCH/PTO controller in all versions of the PTO control system. The
sensor output is directly proportional to PTO clutch output speed, and is a quasi-sinusoidal wave form the
amplitude of which is non-linearly proportional to speed. The amplitude range of the signal is from 3 to 80 volts
peak to peak centered around chassis ground. Frequency range is from zero to 3 200 Hz worst case.
PTO SHAFT SIZE SPEED SIGNAL
The PTO shaft size speed frequency is derived from a variable reluctance speed sensor in the transmission. The
sensor is connected directly to the AUX/HITCH/PTO controller and its output is proportional to PTO clutch output
speed, but is scaled differently from the PTO clutch speed signal depending upon which PTO shaft is in use, i.e. 1-
3/4 inch 1000 RPM, 1-3/8 inch 1000 RPM or 1-3/8 inch 540 RPM. The signal is a quasi-sinusoidal waveform the
amplitude of which is non-linearly proportional to speed. The amplitude range of the signal is from 3 to 80 volts
peak to peak centered around chassis ground. Frequency range is from zero to 760 Hz worst case.
Solution:
The PTO shaft speed sensor is hard wired to the AUX/HITCH/PTO controller. If the PTO shaft speed sensor fails in
the AUX/HITCH/PTO controller, fault code 163, 164, 165 and 178 may exist.
1. Check for fault code 163, 164, 165 and 178 from the AUX/HITCH/PTO controller. If any exists, follow the
corresponding corrective action.
2. Check the function of the AUX/HITCH/PTO controller.
NOTE: See schematic sections 49 and 50 on the schematic poster.
Section 55 - Electrical System, Controller - Chapter 2
FAULT CODE INST 3010
55-2-6