New Holland CX720 Repair Manual page 2556

E0023-05-Hydrostatic Motor Temp Line Disconnected (C.20.F.95.90
- G.30.B.50)
E0023-05 - Hydrostatic Motor Temp Line Disconnected
Cause:
The hydrostatic motor temperature (B-46) is disconnected.
Possible failure modes:
1. Sensor supply wiring has an open.
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 there is an open in the supply/ground wiring the voltage will read 4.9 - 5.2 volts.
B. If the voltage reading is 4.9 - 5.2 volts continue with Step 2.
C. If the voltage reading is within the proper limits, continue the troubleshooting at Step 4.
2. The voltage reading on the InfoView is 4.9 - 5.2 volts. Disconnect the hydrostatic motor temperature sensor
connector X091. Install a jumper wire between pins A and B on connector X091.
A. If the voltage drops to 0 - 0.5 volts the open is in the sensor, or sensor wiring. Replace the sensor.
B. If the voltage remains out of range on InfoView display continue with Step 3.
3. The voltage reading on the InfoView is 4.9 - 5.2 volts. Remove the jumper wire from connector X091. Use a
multimeter to check for continuity between pin A on connector X091 and chassis ground.
A. If no continuity is found continue with Step 4.
B. If continuity is found continue with Step 5.
4. Use a multimeter to check for continuity between pin 16 on connector X023 and chassis ground.
A. If no continuity is found, there is an open in wire 723, or 501 blue between connectors X023 and connector
X020 J3-18 on CCM1. Locate and repair the open circuit.
B. If continuity is found the open is between connector X023 and X091 wire 723 or 774 blue in lower frame
harness.
5. The voltage reading on the InfoView is 4.9 - 5.2 volts. Disconnect the connector X023. Install a jumper wire
between pins 26 and 16 on connector X023.
A. If the voltage drops to 0 - 0.5 volts the open is between connector X023 and X091 on wire 773 yellow.
Locate and repair the open.
B. If the voltage remains at 4.9 - 5.2 volts on InfoView display the open is between connector X023 and
connector X020 J3-33 wire 773 yellow. Locate and repair the open.
6. 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.
Series 1348 and above
Wiring harness - Electrical schematic frame 08 (A.30.A.88-C.20.E.08)
Series 1206-1347
POWER TRAIN - TRANSMISSION Hydrostatic
2 4/7/2006
C.20.F / 104