CARTRIDGE GP-TURBOCHARGER 1W1604 - Caterpillar

System Operation
The Electronic Control Module (ECM) is the computer which controls the 3408/3412 High Performance Marine Engine. The Personality Module is the software which controls how the computer (ECM) behaves. The two must be used together - neither can do anything by itself. The Personality Module consists of:* All of the software, or Instructions for the ECM to do its job. Because of this, updating the Personality Module to a different version may cause some engine functions to behave in a different manner.* Performance Maps, which define fuel rate, etc. for various operating conditions to achieve optimum performance. These are programmed into the Personality Module at the factory only. The ECM consists of:* A microprocessor, to perform the computing necessary to perform the ECM's functions (governing, generating diagnostic codes, communicating with service tools, etc.). The microprocessor gets its instructions from the software in the Personality Module.* Programmable Parameters, stored in permanent memory (both Customer Specified and System Configuration Parameters). Refer to the section 2.0 Programming Parameters for details on what these parameters do.* Logged Diagnostics, the ECM logs certain diagnostic codes into memory so that a record is retained. Refer to the section; Troubleshooting Diagnostic Codes, for further information on logged codes.* Input Circuits, to filter electrical noise from sensor signals and to protect sensitive internal circuits from potentially damaging voltage levels.* Output Circuits, to provide the high currents necessary to energize lamps or rack as the microprocessor chooses.* Power circuits, to provide clean, stable electrical power to internal circuits and external sensors. When your troubleshooting indicates that a failure has occurred in the ECM or Personality Module then temporarily install a new part and thoroughly Retest.Diagnostic Codes
Functional Test