Massey Ferguson 723.02 – Engine ECU: Camshaft Speed Sensor Signal Issue

The Engine Control Unit is detecting that the number and/or position of the camshaft pulses is implausible or that there is a signal deviation between the crankshaft and camshaft that is too large.

• 4710
• 7724S
• 5712SL
• Interim Tier 4 (2012-2015)
• 7722
• 7722S
• 7615
• 5613
• 5713SL
• 7720S
• 7716
• 7718
• T4
• 7715
• 5710SL
• 7726
• 7616
• 7618
• 5608
• 4708
• 7619
• 7626
• 7726S
• 7624
• 4707
• 4709
• 5711SL
• 7614
• 7718S
• 5610
• 7620
• 7719
• 7714
• 7716S
• T4 (2015-2021)
• 5612
• 7622
• 7720
• Tier 4 (2015-2021)
• 5611
• 7715S
• 5609
• 7724
• 6485
• 6490
• 6495
• 6499
• 7485
• 7490
• 7495
• 8450
• 8470
• 8480
• 7614 through 7626
• 7714 through 7726S

1. 1

   Check the camshaft speed sensor wiring harness and connector for physical damage, corrosion, or loose pins.

2. 2

   Test the sensor wiring for an open circuit, a short to ground, or a short to high voltage.

3. 3

   Use a multimeter to check the nominal resistance in the sensor coil (a healthy inductive rotation sensor on these engines typically reads between 1120 - 1530 Ohms at 20°C).

4. 4

   Verify that the engine timing is correct, as a large signal deviation between the crankshaft and camshaft can indicate a mechanical timing issue.

1. 1

   Preparation

   Turn off the tractor, remove the key, and disconnect the negative battery terminal to prevent electrical shorts.

2. 2

   Locate the sensor

   Locate the camshaft speed sensor on the engine block, on the upper front face of the camshaft.

3. 3

   Disconnect sensor

   Unplug the electrical connector from the camshaft speed sensor.

4. 4

   Remove sensor

   Remove the retaining bolt holding the sensor to the engine block. Carefully pull the sensor straight out of its bore.

5. 5

   Clean mounting surface

   Wipe the mounting surface and the bore on the engine block clean of any oil, dirt, or debris to ensure the new sensor seats perfectly flat.

6. 6

   Install new sensor

   Insert the new camshaft speed sensor into the bore. Install and tighten the retaining bolt to the manufacturer's torque specification.

7. 7

   Reconnect wiring

   Plug the electrical connector back into the sensor, ensuring it clicks and locks into place.

8. 8

   Clear codes and test

   Reconnect the battery. Turn the ignition on and use a diagnostic service tool (connected via the CAN bus) to clear the 000723.02 fault code from the ECU memory. Run the engine to verify the code does not return.