DRIVE GP-PUMP 1004629 - Caterpillar

Procedure
Illustration 1 g00753965
D series Autoshift electronic control module
Turn the key start switch to the OFF position. Turn the disconnect switch to the OFF position. The ECM is located within the battery box on D Series machines. The ECM for the 446B and 446D is located under the fender. Disconnect the machine harness connectors from the ECM.
Remove the ECM from the machine.
Make sure that the replacement ECM has the correct part number.
Install the replacement ECM.
Connect the machine harness to the ECM.
Turn the key start switch to the ON position. Make sure that the ECM successfully completes the start-up test.
Determine whether the replacement ECM is programmed. Connect the Caterpillar Electronic Technician (ET) service tool to the service tool connector of the machine.If the ECM is NOT programmed, the service tool will indicate the problem. An ECM that is NOT programmed must be programmed before use. Use the Caterpillar Electronic Technician (ET) service tool to flash the ECM.If the ECM is programmed, the service tool provides access to the expected areas of the ECM.Select the "Service" menu item with the service tool. Select the "Configuration" function. A list of items will appear. Select the proper items and program the correct information. This information is available from the old ECM or from your dealer.No calibrations are required.