E0206-05-Rotary Screen Brush Motor Line Disconnected (B.50.A.58.60 - G.30.B.46) - New Holland CX720 Repair Manual

E0206-05-Rotary Screen Brush Motor Line Disconnected
(B.50.A.58.60 - G.30.B.46)
CX840 Series 1348 - 1407, CX840 Series 1282 - 1347, CX840 Series 1238 - 1281, CX840 Series 1206 - 1237, CX860 Series 1348 - 1407, CX860
Series 1282 - 1347, CX860 Series 1238 - 1281, CX860 Series 1206 - 1237, CX880 Series 1348 - 1407, CX880 Series 1282 - 1347, CX880 Series
1238 - 1281, CX880 Series 1206 - 1237
E0206-05 - Rotary Screen Brush Motor Line Disconnected
NOTE: This troubleshooting chart is for CX 840, CX 860 and CX 880 combines with electronic governor engines only.
The troubleshooting chart for this fault code on CX 720, CX 740, CX 760, CX 780 and CX 820 combines with 7.5L
mechanical governor engines is listed before this chart.
Cause:
The rotary screen brush motor (M-27) control voltage circuit open, or shorted to ground.
Possible failure modes:
1. Supply wiring damaged.
2. Bad motor.
3. Controller internal failure (internal regulator failure).
Solution:
1. This is an H-bridge-controlled circuit (refer to Rotary screen Screen brush - Logical diagram (B.50.A.58.60
- C.20.B.72))
Enter the InfoView monitor - service info screens
Record and erase service history
Enter the InfoView monitor - "Diagnose Info" screens. Select CCM2, and scroll down to select "Rotary Screen
Brush motor". Manually operate the motor in both directions.
Record in which direction the circuit operates.
Reload error history. Check for fault codes 0172-06 and 0206-05.
Use the following table to determine the location of the fault.
Symptom
Rotary screen brush
motor operates in 1
direction only
Rotary screen brush
motor does not oper-
ate in either direction
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 code indicates circuit has shorted to ground. Disconnect rotary screen brush motor connector X206. Mea-
sure between terminals A or B on the motor connector and a known good ground. There should be no continuity
to ground.
A. There is continuity to ground, indicating a short to ground in the motor. Replace the rotary screen brush
motor.
B. There is no continuity to ground. Continue with step 4.
4. Replace the Throttle/Brush relay K15 with a known good relay, and retest the circuit.
A. If the circuit now works properly, then the relay had shorted out internally. Replace the relay.
POWER PRODUCTION - ENGINE COOLANT SYSTEM
Errors
0172-06 0206-05
X
X
X
Go to step 2
Go to step 3
Go to step 12
Go to step 20
2 4/7/2006
B.50.A / 49
Motor bound up
Short to ground
Open
Fuse 23 blown or
open