E0310-11-Bypass Unit Engage Output Unidentified Failure Code - New Holland CX720 Repair Manual

E0310-11-Bypass Unit Engage output Unidentified Failure Code
(A.50.A.96.95 - G.30.B.46)
E0310-11 - Bypass Unit Engage output Unidentified Failure Code
Cause:
The sample motor (M-28) engage circuit is open, or shorted to ground.
Possible failure modes:
1. Supply wiring damaged.
2. Bad relay in moisture sensor assembly.
3. Controller internal failure (internal regulator failure).
Solution:
1. Enter the InfoView monitor - "Diagnose info" screen.
Select "CCM3" or "Precision Farming" sub menu.
Select "Bypass Unit Engage output" and select the "Status" screen. Press the "Enter" key to manually power
the circuit.
The status screen should indicate "OK" if the circuit is working properly.
A. If the status screen indicates "Error", the circuit is open or shorted to ground. Continue with Step 2.
B. If the status screen indicates "OK", the circuit is working properly. Continue with step 6.
2. Disconnect connector X222 at the sample motor M-28. Use a multimeter to check the resistance of the sample
motor engage relay between connector X222 pins 2 & 4. The proper resistance range is 65 - 80 ohms.
A. If there is zero resistance, the sample motor engage relay is shorted internally. Replace the relay.
B. If there is infinite resistance, the sample motor engage relay is open. Replace the relay.
C. If the resistance is correct, continue with step 3.
3. Use a multimeter to check for continuity between connector X222 pin 4 (harness side) and chassis ground. Flex
the expansion (EX) harness while making this check.
A. If there is continuity to ground, there is a short to ground in the expansion harness between connector
X222 pin 4 and connector X013 pin J2-13 wire 837 white. Locate the short and repair.
B. If there is no continuity to ground, continue with step 4.
4. Use a multimeter to check for continuity between connector X222 pin 2 (harness side) and chassis ground. Flex
the expansion (EX) harness while making this check.
A. If there is no continuity to ground, there is an open circuit in the expansion (EX) harness between connector
X222 pin 2 and front frame ground #2 wire 564 black or 543 black. Locate the open and repair.
B. If there is continuity to ground, continue with step 5.
5. Turn the key switch to the ON position. Use the Infoview monitor - "Diagnose info" screen to manually power the
bypass unit engage output. Use a multimeter to check for 12 volts between connector X222 pin 4 and chassis
ground.
A. If 12 volts is not present, there is an open circuit in the expansion harness between connector X222 pin
4 and connector X013 pin J2-13 wire 837 white. Locate the open and repair.
B. If 12 volts is found, continue with step 6.
6. Erase the fault code and continue operation.
DISTRIBUTION SYSTEMS - ELECTRONIC SYSTEM
A.50.A / 144
2 4/7/2006