EMCP4.1/EMCP4.2 Caterpillar

Replacement Procedure

Note: The configuration from the old ECM can be saved in Cat ET. The configuration can then be uploaded to the new ECM.

1. The new ECM must be reprogrammed after installation. If the ECM that is being replaced is functional, then make a note of the following items: hour meter, all engine setpoints and any spare inputs or outputs that are programmed. Refer to the System Operation, "Setpoint Programming" section within this document.

2. Shut down the engine. Remove the positive lead wire from the battery.

3. Remove the harness connector from the ECM. A 4 mm hex wrench is required in order to turn the fastening screw.

4. Remove the six nuts that fasten the ECM to the front panel. Remove the ECM.

5. Place the new ECM in the front panel. Install the six nuts that were previously removed in order to secure the new ECM to the front panel.

6. Reconnect the harness connector to the ECM and reconnect the positive lead wire to the battery.

   Reference: Generator Set Wiring Diagram Testing and Adjusting, "Electronic Control Module Wiring Diagrams"

7. Use the values from the original ECM in order to reprogram the setpoints, the spare inputs/outputs, and the hour meter. Refer to Step 1.