C4.4 and C6.6 Industrial Engines and Engines for Caterpillar Built Machines Caterpillar

The Electronic Control Module (ECM) detects a combination of switch positions for the mode switches that has not been defined.

System Response:

The ECM will return the engine to the last good mode selection or setting.

The engine will start and the engine will default to the previous mode selection. The engine may operate at reduced speed or reduced power. This will depend on the mode that is selected.

Test Step 1. Perform the following diagnostic procedure: Mode Selection Circuit - Test

Results:

• OK - STOP