Electronic Control Module (ECM) - Replace
Before the ECM is replaced, ensure that replacement is absolutely necessary. The ECM is seldom the cause of a fault. Always check that power is available to the ECM. Battery voltage is required from contacts 1 and 6 to contacts 2 and 5 of the machine harness connector "J1" for the ECM.
- Turn the disconnect switch and the key start switch to the OFF position. Disconnect the machine harness from the ECM.
- Remove the ECM.
- Make sure that the replacement ECM is the correct part number.
- Connect the machine harness to the ECM.
- Install the replacement ECM.
- Cycle power to the ECM twice before using the ECM. This establishes the machine code and the options code in the ECM memory of the Caterpillar Monitoring System .
- Perform system calibrations.
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