G.30.B.53); E0678-06-Current Protection Line 0 Short Circuit (A.50.A.91.60 - G.30.B.52) - New Holland CX720 Repair Manual

E0678-06-Current Protection Line 0 Short Circuit (A.50.A.91.60 -
G.30.B.52)
E0678-06 - Current Protection Line 0 Short Circuit
Cause:
The Right Hand Module (RHM) has detected that the Current Protection Line 0 circuit current is >0.2 amps .
Possible failure modes:
1. The Current Protection Line 0 circuit is shorted to another circuit causing excessive current flow.
2. RHM internal failure.
3. Multi Function Handle (MFH) failure.
Solution:
1. The "Line 0" circuit is the common line for the unloader switches and unlock switch in the multifunction handle,
and connects between RHM connector X028 pin 1 and MFH connector X385 pin 10.
Verify the fault is present. Enter the Infoview monitor - "Diagnose info" screen, "MFH" sub-menu. Select "Current
Protection Line 0" and observe the current.
The normal operating range for the Current Protection Line 0 circuit is 0.00 - 0.20 amps .
A. If the current reading is >0.20 amps , continue with Step 2.
B. If the current reading is within the proper limits, the fault may be intermittent. Continue troubleshooting at
Step 3.
2. Verify the MFH is good. Turn off the ignition switch. Disconnect the Right Console Harness connector X028 .
Using an ohmmeter, measure the continuity between the positive (+) and negative (-) pins of the Right Console
Harness connector X028 according to the table below. Operate the respective switch while observing the ohm-
meter. When a switch is activated the meter should read between 1.5M - 1.7M ohms , and open when idle.
Check for shorted wiring to other pins as you test each circuit. Refer to the schematic as needed.
Switch
Unload Tube Out
Unload Tube Out Lock
Unload Auger Engage
Unload Tube In
Unload Tube In Lock
Handle Unlock
Reel Fore
Reel Down
Reel Up
Reel Speed Decr.
Reel Back
Reel Speed Incr.
Emergency Stop
Lateral Tilt CCW
Header Down Fast
Header Up Slow
Header Up Fast
HHC Resume
Lateral Tilt CW
Header Down Slow
A. If all of the switches and wires test good, then the MFH is good. 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 3.
DISTRIBUTION SYSTEMS - ELECTRONIC SYSTEM
+ Pin
5
11
4
10
9
2
5
11
4
10
9
2
8
5
11
4
10
9
2
8
A.50.A / 130
2 4/7/2006
- Pin
1
1
1
1
1
1
7
7
7
7
7
7
7
6
6
6
6
6
6
6