Electronic Control Module (ECM) - Replace
Before the power train electronic control module (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 power train ECM.
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| Illustration 1 | g00990802 |
Back side in the cab | |
- Read the programmable system option settings (ride control, secondary steering, etc) from the ECM by using the Caterpillar Electronic Technician (ET). Record these settings manually for programming the new power train ECM.
- Turn the disconnect switch and the key start switch to the OFF position. Disconnect the machine harness from the power train ECM.
- Remove the power train ECM.
- Make sure that the new power train ECM that is being installed has the correct part number.
- Connect the machine harness to the power train ECM.
- Install the new power train ECM.
- Turn the disconnect switch and the key start switch to the ON position.
- If the correct software is not installed in the new power train ECM, use the ET to flash the correct software.
- Program the options (ride control, secondary steering, etc) via the ET.
- Calibrate the transmission.
- For information on performing the transmission calibration, refer to Testing and Adjusting, "Calibration and Programming".
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