New Holland CX720 Repair Manual page 1928

Symptom Errors
Throttle motor
(7.5L mechan-
ical engine
only) does not
operate in ei-
ther direction
Both Rotary
screen brush
motor and
Throttle mo-
tor (7.5L me-
chanical en-
gine only) do
not operate in
either direc-
tion
A.
2. The rotary screen brush mechanism is mechanically bound up, resulting in high current draw.
A. See the appropriate repair manual chapter for repair and adjustment of the rotary screen brush linkage.
3. Fault codes indicate circuit fault due to short to ground between the rotary screen brush motor and the Throttle/
Brush relay K15. Disconnect the batteries using the battery key. Unplug the rotary screen brush motor connector
X206 . Use a multimeter to check for continuity between connector X206 pin A and chassis ground.
A. If continuity is found, continue with step 4.
B. If no continuity is found, erase the fault codes and continue operation.
NOTE: The CCM module connects both sides of the circuit to ground when in neutral to "lock" the motor in
position. Power must be removed from the module prior to testing for short to ground condition on the motor
circuit to remove this ground path.
4. Disconnect connector X010. Use a multimeter to check for continuity between connector X010 pin 2 and chassis
ground.
A. If no continuity is found, the short to ground is in the harness between connector X206 pin A and connector
X010 pin 2 wire 821 white. Locate the short and repair.
B. If continuity is found, continue with step 5
5. Disconnect connector X004. Use a multimeter to check for continuity between connector X004 pin 27 and
chassis ground.
A. If no continuity is found, the short to ground is in the harness between connector X010 pin 2 and connector
X004 pin 27 wire 821 white. Locate the short and repair.
B. If continuity is found, the short to ground is in the harness between connector X004 pin 27 and the Throttle/
Brush relay K15 pin 4 on the fuse panel. Locate the short and repair.
6. Fault codes indicate circuit fault due to short to ground between the rotary screen brush motor and/or the throttle
motor and the CCM2 module. Disconnect the batteries using the battery key. Unplug the rotary screen brush
motor connector X206 and the throttle motor connector X196 . Use the multimeter to check for continuity be-
tween connector X206 pin B and chassis ground.
A. If continuity is found, continue with step 7.
B. If no continuity is found, continue with step 8.
NOTE: The CCM module connects both sides of the circuit to ground when in neutral to "lock" the motor in
position. Power must be removed from the module prior to testing for short to ground condition on the motor
circuit to remove this ground path.
POWER PRODUCTION - FUEL AND INJECTION SYSTEM
X
X
X X
2 4/7/2006
B.20.A / 98
Go to step 23 Open
Go to step 32 Short
ground
Go to step 33 Open
Go to step 38 Fuse 23 blown
or open
to