The ECM does the following:
• Monitors and controls the engine operation and performance
• Enables Power Takeoff and cruise control
• Communicates engine and vehicle information to instrument cluster
• Enables electronically controlled transmission (for vehicles with feature)
• Enables diagnostic programming tools
Fault Detection / Management
The ECM automatically performs diagnostic self-checks. The ECM self-test includes memory, programming, and internal power supply checks.
The ECM will detect internal Diagnostic Trouble Codes (DTCs) depending on the severity of the problem.
Additionally, the ECM provides DTC management strategies to permit limited engine and vehicle operation.
When DTCs 613, 614, 621, 622, and 623 are set by the ECM, the amber ENGINE lamp will be illuminated.
