New Holland CX720 Repair Manual page 3613

E0005-03-Straw Walker Protection Shorted To High Source
(K.42.E.95.50 - G.30.B.54)
CX720 Series 1206 - 1237, CX740 Series 1206 - 1237, CX760 Series 1206 - 1237, CX780 Series 1206 - 1237, CX820 Series 1206 - 1237, CX840 Series
1206 - 1237, CX860 Series 1206 - 1237, CX880 Series 1206 - 1237
E0005-03 - Straw Walker Protection Shorted To High Source
Cause:
The straw walker protection sensor (B-05) circuit is shorted to a higher than normal voltage source.
Possible failure modes:
1. Sensor supply wiring shorted to 12 volts.
2. Controller internal failure (internal regulator failure).
Solution:
1. Enter the InfoView Monitor - "Diagnose info" screen.
Select "Threshing" sub menu.
Select "Straw Walker Protection" and check voltage range.
The proper voltage with straw walker plate raised - 0 - 1.8 volts
The proper voltage with straw walker plate hanging - 1.8 - 10.0 volts.
A. If the voltage reading is higher than 10 volts continue with Step 2.
B. If the voltage reading is within the proper limits, since the shorted wire may not be powered up at this time.
Continue the troubleshooting at Step 5.
2. The voltage reading on the InfoView is above 10.0 volts. Disconnect the straw hood top harness from the straw
hood harness at connector X096.
A. If the voltage drops below 10 volts the short is in the straw hood top harness between connector X096
and X249. Locate and repair the short.
B. If the voltage remains high on InfoView display continue with Step 3.
3. The voltage reading on the InfoView is high. Disconnect the strawhood harness from the straw walker harness
at connector X71.
A. If the voltage drops below 10 volts the short is in the strawhood harness between connector X071 and
X096. Locate and repair the short.
B. If the voltage remains high on InfoView display continue with Step 3.
4. The voltage reading on the InfoView is high. Disconnect the straw walker harness from the main frame harness
at connector X024.
A. If the voltage drops below 10 volts the short is in the straw walker harness between connector X024 and
X071. Locate and repair the short.
B. If the voltage remains above 10 volts on InfoView display the short circuit is somewhere between connec-
tor X024 and connector X019 J2-39 on CCM1 in the main frame harness wire 432 yellow.
5. Manually operate the straw walker protection sensor and monitor the InfoView voltage readings.
A. If high voltage reading is now viewed go back to Step 2.
B. If a 10 volt or higher reading cannot be generated on the InfoView display, erase the fault code and con-
tinue operation.
Series 1206-1237
Wiring harness - Electrical schematic frame 15 (A.30.A.88-C.20.E.15)
Series 1206-1237
Wiring harness - Electrical schematic frame 20 (A.30.A.88-C.20.E.20)
CROP PROCESSING - SEPARATING Straw walker
2 4/7/2006
K.42.E / 23