New Holland CX720 Repair Manual page 3696

E0016-05-Clean Grain Elevator RPM Line Disconnected
(K.60.B.95.81 - G.30.B.50)
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
E0016-05 - Clean Grain Elevator RPM Line Disconnected
NOTE: This troubleshooting chart is for CX combines Series 1206 - 1237 only.
Cause:
The clean grain elevator RPM sensor (B-08) circuit is open.
Possible failure modes:
1. Sensor supply wiring is open.
2. Controller internal failure (internal regulator failure).
Solution:
1. Enter the InfoView monitor - "Diagnose info" screen.
Select "Cleaning" sub menu.
Select "Clean Grain Elevator RPM" and check voltage range.
The proper voltage for sensor unblocked by ferrous metal is 0.5 - 5.6 volts
The proper voltage for sensor blocked by ferrous metal is 5.6 - 7.3 volts
The proper voltage with sensor disconnected is 7.3 - 9.0 volts.
A. If the voltage reading is high 7.3 - 9.0 volts continue with Step 2.
B. If the voltage reading is within the proper limits, the open is not present at this time. Continue the trou-
bleshooting at step 5.
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 7.3 - 9.0 volts. Disconnect the clean grain elevator RPM sensor
connector X182. Use a jumper wire to short the harness end of connector X182 pin 2 to chassis ground.
A. If the InfoView monitor drops to 0 - 0.5 volts indicating a ground, the open circuit is not in the supply side
of the circuit. Continue with step 3.
B. If the InfoView monitor still displays 7.3 - 9.0 volts, the open circuit is in the main frame (MF) harness
between connector X182 pin 2 and connector X019 pin J2-28 wire 450 yellow. Locate the open and
repair.
3. Disconnect the clean grain elevator RPM sensor connector X182. Use a multimeter to check for continuity
between the harness end of connector X182 pin 1 and chassis ground.
A. If there is continuity, the ground path for the sensor is complete, and the fault is in the sensor itself. Replace
the sensor.
B. If there is no continuity to ground, the ground path for the sensor is open. Continue with step 4.
4. Remove the cap and buss bar assembly from the splice block E, W05 in the main frame harness. Use a multi-
meter to check for continuity between the splice block E, W05 pin A and chassis ground.
A. If there is continuity, the open circuit is in the main frame (MF) harness between connector X182 pin 1 and
splice block E, W05 pin A wire 491 blue. Locate the open and repair.
B. If there is no continuity to ground, the open circuit is in the main frame (MF) harness between splice block
E, W05 pin A and connector X019 pin J2-14 wire 401 blue or 460 blue. Locate the open and repair.
5. Erase the error code and continue operation.
CROP PROCESSING - STORING AND HANDLING Grain storing
2 4/7/2006
K.60.B / 62