E0039-03-Ccm1 5V Ref Voltage 1 Shorted To High Source (A.50.A.91.81 - G.30.B.54) - New Holland CX720 Repair Manual

E0039-03-CCM1 5V Ref Voltage 1 Shorted To High Source
(A.50.A.91.81 - G.30.B.54)
E0039-03 - CCM1 5V Ref Voltage 1 Shorted To High Source
Cause:
The circuit is shorted to a higher than normal voltage source.
Possible failure modes:
1. Circuit wiring shorted to 12 volts.
2. Controller internal failure (internal regulator failure).
Solution:
1. Enter the InfoView Monitor - "Diagnose info" screen.
Select "Supply" sub menu.
Select "CCM1 5 V Ref Voltage1" and check voltage range.
The proper voltage range is 4.5 - 5.5 volts
A. If the voltage reading is high out of range continue with Step 2.
B. If the voltage reading is within the proper limits, since the shorted wire may not be powered up at this time.
Continue the troubleshooting at Step 4.
2. The voltage reading on the InfoView is high. Disconnect the lower frame harness from the front frame harness
at connector X023.
A. If the voltage drops back to the normal range the short is between connector X023 and the shoe leveling
actuator (M03) in the lower frame harness.
B. If the voltage remains high on InfoView display then continue with Step 3.
3. The voltage reading on the InfoView is high. Disconnect the feeder harness from the front frame harness at
connector X007.
A. If the voltage drops back to the normal range the short is between connector X007 and the lateral float
potentiometer (R02) in the feeder harness.
B. If the voltage remains high on InfoView display then the short circuit is somewhere between connectors
X023 and X007 on the front frame harness and connector X020 J3-26 on CCM1" wire 726, 727 or 757
pink.
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.
DISTRIBUTION SYSTEMS - ELECTRONIC SYSTEM
A.50.A / 86
2 4/7/2006