3508, 3508B, 3508C, 3512, 3512B, 3512C, 3516, 3516B and 3516C Engines Caterpillar Monitoring System Caterpillar

The Main Display Module Initialization is an internal process that occurs within the Main Display Module. During the Main Display Module Initialization, the Main Display Module monitors the CAT Data Link. Also, the Main Display Module monitors the inputs for the harness code. During the Main Display Module Initialization, the Main Display Module learns about the engine that is being monitored.

The Main Display Module Initialization typically occurs when the Main Display Module is replaced. The harness code is new when the Main Display Module is replaced. However, when a previously used Main Display Module is used as a replacement, the procedure of initialization is necessary. Unexplained diagnostics with the CAT Data Link can occur if the Main Display Module is not initialized correctly. The service person must activate the process for the Main Display Module Initialization when the following condition exists or the condition is suspected.

The Main Display Module that will be installed was taken out of service from an application that had the same harness code as the Main Display Module that will be removed.

Perform the Main Display Module Initialization if the preceding condition exists or this condition is expected.

This procedure causes the process of the Main Display Module Initialization to occur on any Main Display Module. In order to perform the Main Display Module Initialization, the Main Display Module must be powered up with a valid harness code. The harness code must be different from the previous harness code that was used to power down the Main Display Module. For a list of valid harness codes, see Systems Operation, "Quad Gauge Modules".

1. Turn the "ECS" switch to the OFF/RESET position.

2. Disconnect the engine harness from the Main Display Module. Remove the socket or remove the wire from one of the following holes. The holes for the connectors are 3, 6, 12, 16, 22 or 31.

3. Use black electrical tape to secure the removed socket or the removed wire to the harness bundle. Make sure that the contact does not touch any metallic components. Reconnect the engine harness to the Main Display Module.

4. Turn the "ECS" switch to the COOLDOWN/STOP position.

5. Various indicators in the Display Area illuminate. Wait for ten seconds.

6. Turn the "ECS" switch to the OFF/RESET position. Reinstall the socket or reinstall the wire that was removed in Step 2 into the original position on the connector for the Main Display Module.

7. Turn the "ECS" switch to the COOLDOWN/STOP position. Make sure that the Main Display Module successfully completes the Self Test. For more information on this subject, see Testing And Adjusting, "System Self Test". Check the harness code for accuracy. For a list of valid harness codes, see Systems Operation, "Gauge Cluster Modules".