SHAFT-SPROCKET 5A7840 - Caterpillar

Illustration 1 g03327887
(1) ECM (Front of engine)
(2) ISM (Right-hand rear side of engine) The Electronic Control Module (ECM) (1) controls most of the engine functions. The module is an environmentally sealed unit that is in an engine mounted terminal box. The ECM monitors various inputs from sensors in order to control the engine. The ECM supports the following primary functions:
Start/stop control
Injection timing control
Governing of the engine
Data link communications
Diagnostics of the electrical system
Monitoring and protection of engine operationThe Integrated Sensor Module (ISM) (2) supports the following functions:
Monitoring of the cylinder exhaust temperature sensors
Monitoring of the detonation sensorsThe modules do not have a removable personality module. The software is changed by programming a flash file into the module via the Caterpillar Electronic Technician (ET).