John Deere 627..............: ECU Unswitched, Power Missing

The system indicates that the ECU is not receiving power when it should be. This may result in the ECU not functioning properly or not being able to operate as intended.

1. 1

   Power supply to the ECU

2. 2

   Wiring connections to the ECU

3. 3

   Fuses or circuit breakers related to the ECU

1. 1

   Inspect the power supply to the ECU

   Verify that the ECU is receiving the correct voltage as specified in the service manual.

2. 2

   Check wiring connections

   Examine all wiring connections to the ECU for looseness, corrosion, or damage.

3. 3

   Test fuses or circuit breakers

   Ensure that all fuses or circuit breakers associated with the ECU are intact and functioning.