Case IH AFX8010 Repair Manual page 1965

Sensing system Header type module - Short circuit to B+
(K.25.D.95.80 - G.30.B.54)
AFX8010
E0148-03 - Header Type Module
Context:
Headers used on the AFX combine may be equipped with a header type module, which is used to identify the
header type to the combine. This allows the operator to store configuration information in memory that may be
recalled when the header is attached.
Cause:
The header type module (R-20) circuit is shorted to a higher than normal voltage source.
Possible failure modes:
1.
Sensor supply or signal wiring shorted to 12 volts.
2.
Sensor ground wiring is open.
3.
Controller internal failure (internal regulator failure).
Solution:
1. Enter the Universal Display Plus "DIAG" screen. Select the "HDR HEIGHT/TILT" or "HEADER" sort menu,
and select "TYPE SEN" to check the voltage range.
The normal operating range for the header type module circuit is 0.3 - 4.72 volts.
The normal voltage readings for the different header types are as follows:
Header Type
Corn header
Grain header
Draper header
Pick up header
Programmable header
No header installed
A. If the voltage reading is 4.72 volts or greater, continue with Step 2.
B. If the voltage reading is within the proper limits, the shorted wire may not be powered up at this time.
Continue the troubleshooting at Step 5.
2. Disconnect the header type module connector X435. Locate the wire 1223 pink in the connector using
the following table:
Header Type
Corn header
Grain header
Draper header
Pick up header
Programmable header
Use a multimeter to check the voltage between connector X435 wire 1223 pink and chassis ground. There
should be 5 volts.
CROP PROCESSING - FEEDING Header feeding
3.72 - 4.72 volts
2.93 - 3.72 volts
2.02 - 2.93 volts
1.22 - 2.02 volts
0.3 - 1.22 volts
0 - 0.3 volts
Pin A
Pin A
Pin A
Pin F
Pin F
9711 1 27/05/2004
K.25.D / 15
Sensor Voltage
Connector X435 5 volts Power Wire