E0656-07-Csw Throttle Decrease Mechanical Out Of Range (B.20.A.06.81 - G.30.C.24) - New Holland CX720 Repair Manual

E0656-07-CSW Throttle Decrease Mechanical Out of Range
(B.20.A.06.81 - G.30.C.24)
E0656-07 - CSW Throttle Decrease Mechanical Out of Range
Cause:
The Right Hand Module (RHM) has detected that the Console Switch (CSW) Throttle Decrease circuit voltage is
>3.500 volts since power up.
Possible failure modes:
1. The CSW Throttle Decrease circuit voltage is out of range.
2. RHM internal failure.
3. The Engine Throttle switch S-36 is stuck or shorted to >3.500 volts .
Solution:
1. Verify the fault is present. Enter the Infoview monitor - "Diagnose info" screen, "Console" sub menu. Select
"CSW Throttle Decrease" and observe the voltage.
The normal operating range for the CSW Throttle Decrease 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 >3.500 volts , continue with Step 2.
B. If the voltage reading is within the proper limits, the fault may be intermittent. Continue troubleshooting at
Step 5.
2. Verify the RHM is good. Turn off the ignition switch. Disconnect the Right Console Harness connector X029
. Using the proper tool, remove pin 4 wire 322 yellow from X029 . With the wire removed from the connector,
reconnect X029 . Turn the ignition back on and recheck the CSW Throttle Decrease voltage.
A. If the voltage now reads <3.500 volts , the RHM is good. Continue troubleshooting at Step 3.
B. If the voltage is still >3.500 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 5.
3. Verify the Engine Throttle switch S-36 is good. Using a voltmeter, measure the voltage at Engine Throttle switch
S-36 connector X060 pin 1. While observing the voltage reading, operate the Engine Throttle switch S-36.
A. If the voltage reading varies from <3.500 - 12.0 volts, then the switch is working properly. Continue trou-
bleshooting at Step 4.
B. If the voltage never reads <3.500 volts , turn off the ignition switch. Disconnect the Engine Throttle switch
S-36 connector X060 . Using the proper tool, remove pin 1 wire 322 yellow from X060 . With the wire
removed from the connector, reconnect X060 . Turn the ignition back on and recheck the voltage reading.
If the voltage reading still does not drop to <3.500 volts , reinstall the wire removed for troubleshooting.
Replace Engine Throttle switch S-36. Continue troubleshooting at Step 5.
4. Verify circuit 324 yellow is good. Inspect for a short to another wire between Right Console Harness connector
X029 pin 4 and Engine Throttle switch S-36 connector X060 pin 1.
A. If the circuit checks good, continue troubleshooting at Step 5.
B. Locate the short. Repair the shorted wiring. Continue troubleshooting at Step 5.
5. 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 04 (A.30.A.88-C.20.E.04)
POWER PRODUCTION - FUEL AND INJECTION SYSTEM
2 4/7/2006
B.20.A / 108