E0288-03-Grain Yield Sensor Shorted To High Source (A.50.A.96.95 - G.30.B.54) - New Holland CX720 Repair Manual

E0288-03-Grain Yield Sensor Shorted to High Source (A.50.A.96.95
- G.30.B.54)
E0288-03 - Grain Yield Sensor Shorted to High Source
Cause:
The grain yield sensor (R05) circuit is shorted to a high source.
Possible failure modes:
1. Yield sensor wiring is shorted to high source.
2. Controller internal failure (internal regulator failure).
Solution:
1. Enter the InfoView™ monitor - "Diagnose info" screen.
Select "CCM3" or "Precision Farming" sub menu.
Select "Grain Yield sensor" and check voltage range.
The proper voltage range is 0.1 - 5.2 volts.
A. If the voltage reading is high out of range (>5.2 volts), continue with Step 2.
B. If the voltage reading is within the proper limits, continue the troubleshooting at step 3.
NOTE: Visually inspect the wiring harness and connectors. Verify that the connector was fully installed. Inspect
the terminals and wires at the connector for pushed back or corroded terminals or damaged wires. Flex the
harnesses involved to reveal intermittent breaks or shorts in the wiring concerned.
2. The voltage reading on the InfoView™ monitor is low out of range. Disconnect the sensor connector X223. Use
a multimeter to check for voltage on connector X221 pin C.
A. If there is voltage, there is a short to high voltage in the expansion (EX) harness between connector X223
pin C and connector X014 pin J3-32 wire 552 yellow. Locate short and repair.
B. If there is no voltage, there is a fault in the yield sensor. Replace the yield sensor.
3. Operate the machine while monitoring InfoView™ monitor.
A. If no low out of range readings are indicated, erase the fault code and continue operation.
DISTRIBUTION SYSTEMS - ELECTRONIC SYSTEM
A.50.A / 142
2 4/7/2006