HARNESS AS-CONTROL 2697687 - Caterpillar

Illustration 1 g01095860
The terminal box for the master ECM is shown. The terminal box for the slave ECM is similar. (1) Ground strap (2) ECM connector (3) ECM connector
Remove the electrical power from the engine.
Use a 4 mm allen wrench to disconnect connectors (2) and (3) .
Remove the mounting nut in order to disconnect ground strap (1). Remove the three remaining mounting nuts.Note: Rubber grommets behind the ECM are held in place by the mounting studs. The grommets help to reduce vibration. The grommets may fall when the ECM is removed. Be sure not to lose the grommets.
Remove the ECM from the terminal box.
Install the replacement ECM.
Use the mounting hardware to install the new ECM. Use a mounting nut to fasten the ground strap for the ECM to the upper left mounting stud. Then install the other three mounting nuts.Check the mounting hardware and the ECM for correct installation. A correctly installed ECM will move slightly on the rubber grommets. If the ECM cannot move slightly on the grommets, check that the washers, spacers, and grommets are positioned correctly.
Use a 4 mm allen wrench to connect the P1 and P2 connectors to the ECM. Tighten the screws to a torque of 6 1 N m (55 9 lb in).
Program the configuration parameters and the monitoring system parameters into the replacement ECM.
Restore the electrical power to the engine.
Set the engine control to the "STOP" mode.
Select "File/Select ECM" from the drop-down menu.
Select the replacement ECM and click "OK".
Select "Service/Copy Configuration/ECM Replacement" from the drop-down menu. Click "OK" on the window.
Select "Program ECM" from the lower left corner of the screen. Select the replacement ECM and click "OK". If the correct ECM is shown, select "Yes".
After the loading is complete, a window with the message "Programming Conflict Warning" will appear. Select "OK".
A window with the message "Program ECM Results" will appear. Select "OK".Note: When you program a new ECM, factory passwords are not required for the first hour of operation. After one hour, factory passwords are required for changing the parameters that are normally protected with factory passwords.
Calibrate the oxygen sensor and the speed/timing sensor.Refer to Troubleshooting, "Oxygen Sensor - Calibrate" and to Troubleshooting, "Engine Speed/Timing Sensor - Calibrate".