New Holland T8010 Manual page 1546

5 volt reference voltage too low
Cause:
The transmission controller provides 5 volt to the FNRP pod and the Master clutch pedal pot through pin 16 and pin
17 of connector C351. The controller monitors the voltage at the two pins. If the voltage is lower than 4.2 volts, this
fault code will be recorded.
Possible failure modes:
1. Wiring harness has shortage to ground.
2. Internal problem with the transmission controller.
Solution:
Since the 5 volt is provided to the FNRP pod and the Master clutch pedal pot, relative symptoms or faults codes will
show up if the wire harness has shortage to ground.
1. Troubleshooting by checking fault codes.
If fault codes 66 and 68 come with this fault code, there is a good chance the wiring from the transmission controller
to the FNRP pod has shortage to ground.
If fault codes 11 comes with this fault code, there is a good chance the wiring from the transmission controller to
Master clutch pedal pot has shortage to ground.
2. Troubleshooting by viewing the Instrumentation display.
Turn Key 'ON' and watch the shuttle position display.
If Forward icon does not light up on display when in Forward and Reverse icon does not light up on display when in
Reverse, there is a good chance the wiring from the transmission controller to the FNRP pod has shortage to
ground.
Turn Key 'ON' and get into Trans View to watch the Master clutch pedal position display.
If the Master clutch pedal position stays low on display when Master clutch pedal is not depressed, there is a good
chance the wiring from the transmission controller to Master clutch pedal pot has shortage to ground.
3. Troubleshooting by checking pin connection.(See the procedure for pin removal and erasing fault codes in front
of this section.)
Take pin 16 out of connector C351 and clear all Trans fault codes. Turn the Key 'Off' for a few seconds. Then turn
Key 'On' and check the fault code again. If this fault code does not come again, there is a good chance the wiring
from the transmission controller to the FNRP pod has shortage to ground.
Take pin 17 out of connector C351 and clear all Trans fault codes. Turn the Key 'Off' for a few seconds. Then turn
Key 'On' and check the fault code again. If this fault code does not come again, there is a good chance the wiring
from the transmission controller to Master clutch pedal pot has shortage to ground.
4. Check the wiring from the transmission controller to the FNRP pod and the Master clutch pedal pot.
If the wiring problem is suspected in the FNRP pod circuit,
Check the wiring between Pin 8 of connector C051 and pin 16 of connector C351 for shortage to ground.
Check the wiring between Pin 6 of connector C051 and pin 13 of connector C351 for shortage to ground.
Check the wiring between Pin 5 of connector C051 and pin 12 of connector C351 for shortage to ground.
If the wiring problem is suspected in the Master clutch pedal pot circuit, Check the wiring between Pin 1 and pin 17
of connector C351 for shortage to ground.
5. Check for Internal problem with the transmission controller.
If no problem can be found in steps 1 to 4, clear all the Trans fault codes. Disconnect connector 351, turn Key On,
and check for fault 54 again.
Section 55 - Electrical System, Controller - Chapter 4
FAULT CODE TRANS 54
55-4-19