Controller Area Network (Can)
Previously, for different computers in the vehicle to share the same information, each signal required a different pin and wiring. However, with the introduction of a CAN system, only two lines are required to achieve the same function. The information is in digital format. This method does not use an integrated ECM.
Input signals to TCM (PCM) through' CAN communication'
- Engine RPM, TPS signal
- A/C ON signal, Engine coolant temperature
- Quantity of intake airflow, Vehicle speed
- Shift holding signal (FTCS ON)
Output signals from TCM (PCM) through' CAN communication'
- Request signal for torque reduction
- ATF temperature, TCM (PCM) type, TCM (PCM) error or not
- Damper clutch ON, OFF / Gear position