Additional Signals

ECM manages a wide variety of information. The ECM is connected to other electronic units or system components in vehicle by means of data lines.

These extra signals are used to exchange information between the different systems. For example, the following components are connected to the ECM:

• Anti-Lock Brake System Module.
• Automatic Transmission Control Module.
• A/C compressor On signal, manual climate control system.
• Climate Electronic Control Module.