R2900G Load Haul Dump Power Train Electronic Control System Caterpillar

Before the Power Train Electronic Control Module (ECM) is replaced, ensure that replacement is absolutely necessary. The Power Train ECM is seldom the cause of a diagnostic code. Always check that power is available to the Power Train ECM. Battery voltage is required from connector contacts 1 and 6 to connector contacts 2 and 5 of the harness connector J1 for the Power Train ECM.

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

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Illustration 1	g01043852
Location of the Power Train ECM (1) Cover (2) Armrest

2. Remove the two knobs and the bolt that hold armrest (2) .

3. Remove the seven bolts that hold cover (1) .

4. Remove cover (1) .

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Illustration 2	g01043853
(3) Power Train ECM (4) Harness

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Illustration 3	g01043854
Power Train ECM (5) Connector J1 (6) Connector J2

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Illustration 4	g01043855
(7) Screw

5. Remove two screws (7) from connector J1 (5) and connector J2 (6). Disconnect harness (4) from Power Train ECM (3) .

6. Remove the four bolts that hold the Power Train ECM.

7. Remove the Power Train ECM.

8. Install the new Power Train ECM.

   Note: Make sure that the replacement Power Train ECM is the correct part number.

9. Connect harness (4) to the Power Train ECM. Install two screws (7) .

10. Position cover (1) and install the seven bolts.

11. Position armrest (2) install the two knobs and the bolt that hold armrest (2)

12. Turn the disconnect switch and the key start switch to the ON position.

13. Load the software by flash programming the ECM.

    Reference: For information on loading the software refer to Systems Operation, Troubleshooting, Testing and Adjusting, "Electronic Control Module (Power Train) - Flash Program" for the machine that is being serviced.