Operation CHARM: Car repair manuals for everyone.
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Computers and Control Systems: Description and Operation

SYSTEM DIAGRAM

System Diagram (Part 1):




System Diagram (Part 2):




System Diagram (Part 3):




1. Without Smart Key System:

System Diagram (Part 4):




System Diagram (Part 5):




System Diagram (Part 6):




2. With Smart Key System:




3. COMMUNICATION WITH OTHER COMPUTERS




4. COMMUNICATIONS
a. The ECM communicates with the following ECU using the signals listed. The following table explains receiving and sending signals by the ECM or ECU.