New Holland CX720 Repair Manual page 3419

E0050-03-Isense Feeder Clutch Shorted To A High Source
(K.25.E.14.20 - G.30.B.54)
E0050-03 - Isense Feeder Clutch Shorted To A High Source
Cause:
The Feeder clutch solenoid (L-24) circuit has excessive current draw, or is shorted to a high voltage source.
Possible failure modes:
1. Bad solenoid.
2. Return side wiring shorted to 12 volts.
3. Controller internal failure (internal regulator failure).
Solution:
1. The Isense Feeder Clutch circuit is the ground path for the feeder clutch PWM solenoid. By monitoring current
flow on the return path of the feeder clutch solenoid, the module can provide precise control of the solenoid
engagement. When this error message is reported, this is an indication of excessive current draw on the circuit,
or a result of a high voltage short on the return line.
Enter the InfoView monitor - "Diagnose info" screen.
Select "Feeder" sub menu.
Select "Feeder Clutch valve" and use the arrow keys to select the "Current" screen. Use the "+" key to increase
the output to 100 %, and press "Enter" to power the circuit. Check the current.
The proper feeder clutch solenoid current should be approximately 1.0 - 1.5 amps. The fault code is triggered
by current flow greater than 3.3 amps.
A. If the reading is greater than 3.3 amps, continue with step 2.
B. If the reading is normal (1.0 - 1.5 amps), continue the troubleshooting at step 8.
C. If there is no current reading, the module may have failed as a result of a 12 V short on the Isense circuit.
Continue with step 5.
NOTE: If the current reading is high, immediately shut off the circuit by pressing the "Enter" key after verifying
the reading to prevent module damage.
2. The current reading on the InfoView monitor is high. Turn the key switch to the OFF position and disconnect the
feeder clutch solenoid connector X035. Use a multimeter to check the resistance of the feeder clutch solenoid
L24 between connector X035 pins 1 & 2. The proper resistance range for the feeder clutch solenoid is 7.2 -
11.2 ohms.
A. If out of specification, replace the solenoid. Continue with step 7.
B. If the coil is within specification, continue with Step 3.
3. Disconnect connector X011. Use a multimeter to check the resistance of the unload cross auger solenoid cir-
cuit between connector X011 pins L & M. The resistance should be the same as, or slightly higher than the
resistance of the solenoid as measured in step 2.
A. If the resistance is lower than the previously measured resistance, there is a short in the harness between
connector X035 and connector X011 wires 876 white and 875 black. Locate the short and repair. Continue
with step 7.
B. If the resistance is the same as previously measured, continue with step 4.
4. Disconnect connector X019 on the bottom of CCM1 module. Use a multimeter to check the resistance of the
feeder clutch solenoid circuit between connector X019 pins J2-30 & J2-40.
CROP PROCESSING - FEEDING Feeder housing
2 4/7/2006
K.25.E / 69