785G Off-Highway Truck Systems Caterpillar


Electronic Control Module (ECM) - Replace

Usage:

785G RTL
Prior to the replacement of the ECM, ensure that replacement is necessary. The ECM is seldom the cause of a failure. Always check that power is available to all the contacts of the ECM that are marked with "+ Battery".

Procedure

  1. Turn the disconnect switch and the key start switch to the OFF position.

  2. Disconnect the machine harness connectors from the ECM.

  3. Verify that the part number of the replacement ECM is correct.

  4. Install the replacement ECM.

  5. Connect the machine harness to the ECM.

  6. Turn the disconnect switch and the key start switches to the ON position.

  7. Verify that the ECM operates correctly.

  8. Perform payload calibration.

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