New Holland CX720 Repair Manual page 2555

E0023-04-Hydrostatic Motor Temp Shorted To Low Source
(C.20.F.95.90 - G.30.B.53)
E0023-04 - Hydrostatic Motor Temp Shorted To Low Source
Cause:
The hydrostat motor temperature (B-46) is shorted to ground.
Possible failure modes:
1. Sensor supply wiring shorted to ground.
2. Controller internal failure (internal regulator failure).
Solution:
1. Enter the InfoView Monitor - "Diagnose info" screen.
Select "Driveline" sub menu.
Select "Hydrostat Motor Temp" and check voltage range.
The normal operating voltage range is - 0.5 - 4.9 volts
A. If the voltage reading is 0 - 0.5 volts continue with Step 2.
B. If the voltage reading is within the proper limits, continue the troubleshooting at Step 4.
2. The voltage reading on the InfoView is low. Disconnect the hydrostatic motor temperature sensor connector
X091.
A. If the voltage increases to 4.9 - 5.2 volts the short is in the sensor, or sensor wiring. Replace the sensor.
B. If the voltage remains low on InfoView display continue with Step 3.
3. The voltage reading on the InfoView is low. Disconnect the front frame harness from the lower frame harness
at connector X023.
A. If the voltage increases to 4.9 - 5.2 volts the short is in the lower frame harness between connector X023
and connector X091 wire 773 yellow.
B. If the voltage remains low on InfoView display the short circuit is somewhere between connector X023 and
connector X020 J33 on CCM1 in the front frame harness wire 773 yellow.
4. Visually inspect harness and connectors for damage, bent or dislocated pins, corroded terminals or broken
wires.
A. If no damage is found erase fault code and continue operation.
POWER TRAIN - TRANSMISSION Hydrostatic
2 4/7/2006
C.20.F / 103