Case IH 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

   Power supply to the ECM/PCM

2. 2

   Wiring and connections to the ECM/PCM

3. 3

   ECM/PCM itself

1. 1

   Inspect

   Inspect the power supply to the ECM/PCM for proper voltage and stability.

2. 2

   Check

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

3. 3

   Test

   Test the ECM/PCM for proper functionality using the appropriate diagnostic tools.