Case IH DCU19742: Main Relay Opens Too Early or Too Late

The main relay is not operating at the correct time, either opening too early or too late. This can affect the power supply to the system and may be related to the timing of the EEPROM update. The issue is also associated with the ECM/PCM Power Relay Control Circuit being open.

1. 1

   Main Relay

2. 2

   ECM/PCM Power Relay Control Circuit

3. 3

   Timing of the EEPROM update

1. 1

   Inspect

   Check the main relay for signs of damage or wear.

2. 2

   Test

   Test the ECM/PCM Power Relay Control Circuit for continuity and proper function.

3. 3

   Verify

   Ensure the timing of the EEPROM update is correct and synchronized with the relay operation.