E0206-05-Rotary Screen Brush Motor Line Disconnected (B.50.A.58.60 - G.30.B.46); Cx760 Series 1206 - 1237, Cx780 Series 1348 - 1407, Cx780 Series - New Holland CX720 Repair Manual

E0206-05-Rotary Screen Brush Motor Line Disconnected
(B.50.A.58.60 - G.30.B.46)
CX720 Series 1348 - 1407, CX720 Series 1282 - 1347, CX720 Series 1238 - 1281, CX720 Series 1206 - 1237, CX740 Series 1348 - 1407, CX740 Series
1282 - 1347, CX740 Series 1238 - 1281, CX740 Series 1206 - 1237, CX760 Series 1348 - 1407, CX760 Series 1282 - 1347, CX760 Series 1238 - 1281,
CX760 Series 1206 - 1237, CX780 Series 1348 - 1407, CX780 Series 1282 - 1347, CX780 Series 1238 - 1281, CX780 Series 1206 - 1237, CX820 Series
1348 - 1407, CX820 Series 1282 - 1347, CX820 Series 1238 - 1281, CX820 Series 1206 - 1237
E0206-05 - Rotary Screen Brush Motor Line Disconnected
NOTE: This troubleshooting chart is for CX 720, CX 740, CX 760, CX 780 and CX 820 combines with 7.5L mechanical
governor engines only. The troubleshooting chart for this fault code on CX 840, CX 860 and CX 880 combines with
electronic governor engines follows 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)). The Rotary screen brush motor (M-27) circuit is paired with the engine throttle motor (M-13)
circuit, and the module switches between these two circuits using the Throttle/Brush relay K-15. Because these
circuits are connected and driven from the same module outputs, the troubleshooting procedure must consider
both circuits at the same time.
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.
Start the combine, and operate the engine throttle in both directions.
Record in which direction(s) each circuit operates.
Reload error history. Check for fault codes 0172-06 and 0206-05 (Rotary screen brush motor) and fault codes
0173-06 and 0207-05 (Throttle motor).
Use the following table to determine the location of the fault
Errors
Symptom
0172-06
Rotary screen X
brush motor
operates in 1
direction only
Rotary screen
brush motor
and Throttle
motor (7.5L
mechanical
engine only)
operate in 1 di-
rection only
Rotary screen
brush motor
does not op-
erate in either
direction
POWER PRODUCTION - ENGINE COOLANT SYSTEM
0173-06 0206-05 0207-05
X
X X
X
X
2 4/7/2006
B.50.A / 42
Go to step 2 Motor
up
Go to step 3 Short
ground
Go to step 6 Short
ground
Go to step 10 Open
Go to step 18 Short
ground
bound
to
to
to