New Holland CX720 Repair Manual page 3340

E0647-04-CSW Vertical Knives Left Shorted to Low Source
(K.25.D.05.81 - G.30.B.53)
E0647-04 - CSW Vertical Knives Left Shorted to Low Source
Cause:
The Right Hand Module (RHM) has detected that the Console Switch (CSW) Vertical Knives Left circuit voltage is
<0.500 volts .
Possible failure modes:
1. The CSW Vertical Knives Left circuit is shorted to ground.
2. RHM internal failure.
Solution:
1. Verify the fault is present. Enter the Infoview monitor - "Diagnose info" screen, "Console" sub menu. Select
"CSW Vertical Knives Left" and observe the voltage.
The normal operating range for the CSW Vertical Knives Left circuit is 0.5 - 12.0 volts .
Note that the Infoview monitor is limited to 0.0 - 5.0 volts .
A. If the voltage reading is <0.500 volts , continue with Step 2.
B. If the voltage reading is within the proper limits, the wire may not be shorted at this time. Continue trou-
bleshooting at Step 4.
2. Verify the RHM is good. Turn off the ignition switch. Disconnect the Right Console Harness connector X029
. Using the proper tool, remove pin 7 wire 230 yellow from X029 . With the wire removed from the connector,
reconnect X029 . Turn the ignition back on and recheck the CSW Vertical Knives Left voltage.
A. If the voltage now reads >0.500 volts , the RHM is good. Continue troubleshooting at Step 3.
B. If the voltage is still <0.500 volts , then the fault is in the RHM. Reinstall the wire removed for troubleshoot-
ing. Reload the system software to see if the fault code clears. If the fault is still present after reloading
the software, replace the RHM. Continue troubleshooting at Step 4.
3. Verify circuit 230 yellow is good. Inspect for a short to ground between Right Console Harness connector X029
pin 7 and Vertical Knives switch S-51 connector X063 pin 1.
A. If the circuit checks good, continue troubleshooting at Step 4.
B. Locate the short. Repair the shorted wiring. Continue troubleshooting at Step 4.
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, erase the fault code and continue operation.
Series 1348 and above
Wiring harness - Electrical schematic frame 11 (A.30.A.88-C.20.E.11)
Series 1206-1347
Wiring harness - Electrical schematic frame 30 (A.30.A.88-C.20.E.30)
CROP PROCESSING - FEEDING Header feeding
2 4/7/2006
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