New Holland CX720 Repair Manual page 2545

E0643-13-MFH Position Input Needs Calibration (C.20.F.05.07 -
G.30.D.20)
E0643-13 - MFH Position Input Needs Calibration
Cause:
The Right Hand Module (RHM) has detected that the Multifunction Handle (MFH) Position Input reading is >105 %
or calibration has been lost.
Possible failure modes:
1. The MFH Position is not calibrated.
2. Ground Speed Potentiometer R-04 failure.
3. RHM internal failure.
Solution:
1. Verify the fault is present. Enter the Infoview monitor - "Diagnose info" screen, "MFH" sub menu. Select "MFH
Position Input" and observe the "Relative Position" percentage. With the engine off, move the MFH fully forward
and aft while observing the display.
The normal operating range for the Propulsion Handle Position circuit is 0 - 100 % .
A. If the percentage reading is >105 % , or you are unable to move the handle, continue with Step 2.
B. If the percentage reading is within the proper limits, the fault may be intermittent. Continue troubleshooting
at Step 4.
2. Calibrate the MFH position. Enter the Infoview monitor Configuration Info sub-menu. Select Calibration - Multi-
functional Handle. Press Enter and follow the on-screen instructions. When finished, recheck the MFH Position
Input percentage.
A. If the percentage reading is still able to reach >105 % , continue troubleshooting at Step 3.
B. If the percentage reads between 0 - 100 % . Continue troubleshooting at Step 4.
3. Verify the RHM is good. Reload the system software to see if the fault code clears. Perform Multifunctional
Handle calibration. Recheck the MFH Position Input percentage throughout the range of movement.
A. If the percentage now reads between 0 - 100 % , the RHM is good. Continue troubleshooting at Step 4.
B. If the percentage is still >105 % , then the fault is in the RHM. Replace the RHM. Repeat calibration. If
calibration fails again, replace the Ground Speed Potentiometer R-04.
4. Visually inspect the harness and connectors for damage, bent or dislocated pins, broken or pinched wires.
A. Repair any damage found during visual inspection.
B. If no damage is found, but the symptoms are still present, replace the multifunction handle position.
Series 1348 and above
Wiring harness - Electrical schematic frame 07 (A.30.A.88-C.20.E.07)
Series 1206-1347
Wiring harness - Electrical schematic frame 28 (A.30.A.88-C.20.E.28)
POWER TRAIN - TRANSMISSION Hydrostatic
2 4/7/2006
C.20.F / 93