New Holland CX720 Repair Manual page 2068

A. With the key start switch OFF, disconnect the connector onto the fuel injection pump. Using a suitable
multi-meter check across terminals 3 and 4 on the pump. If either an open circuit or short to ground is
indicated the integral speed sensor is faulty. Remove the fuel injection pump and have it tested/repaired
by an authorized Bosch agent.
B. If the test indicates that the sensor is okay, remove the error code from the ECU memory and operate the
engine. If the fault re-occurs, replace the fuel injection pump.
Series 1206 and above
Wiring harness - Electrical schematic frame 04 (A.30.A.88-C.20.E.04)
POWER PRODUCTION - FUEL AND INJECTION SYSTEM
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