New Holland P0687: ECM/PCM Power Fault

The fault code indicates an issue with the power supply or connection to the ECM/PCM. This may result in improper operation or communication failure of the control system.

1. 1

   ECM/PCM power supply circuit

2. 2

   wiring and connections to the ECM/PCM

3. 3

   battery voltage and charging system

1. 1

   Inspect

   Check the wiring and connections to the ECM/PCM for damage, corrosion, or loose contacts.

2. 2

   Test

   Measure the battery voltage and ensure the charging system is functioning properly.

3. 3

   Verify

   Confirm that the power supply to the ECM/PCM is stable and within the specified range.