New Holland CX720 Repair Manual page 4060

E0018-04-Right Returns RPM Sensor Shorted To Low Source
(K.62.C.95.80 - G.30.B.53)
E0018-04 - Right Returns RPM Sensor Shorted To Low Source
Cause:
The right returns RPM sensor (B-39) circuit is shorted to ground.
Possible failure modes:
1. Sensor supply wiring shorted to ground.
2. Controller internal failure (internal regulator failure).
Solution:
1. Enter the InfoView Monitor - "Diagnose info" screen.
Select "Cleaning" sub menu.
Select "Right Returns RPM sensor" and check voltage range.
The proper voltage sensor blocked by ferrous metal - 5.6 - 7.3 volts
The proper voltage sensor unblocked by ferrous metal - 0.5 - 5.6 volts
A. If the voltage reading is high out of range continue with Step 2.
B. If the voltage reading is within the proper limits, continue the troubleshooting at Step 3.
2. The voltage reading on the InfoView is low. Disconnect the right returns RPM sensor connector X186.
A. If the voltage increases to 7.3 - 9.0 volts the short is in the sensor, or sensor wiring. Replace the sensor.
B. If the voltage remains high on InfoView display the short circuit is somewhere between connector X186
and connector X019 J2-37 on CCM1 in the main frame harness wire 441 yellow.
3. A. If a 0 to 0.5 voltage reading is not shown erase the fault code and continue operation.
CROP PROCESSING - CLEANING Tailings return system
2 4/7/2006
K.62.C / 68