Transmission Control Module (TCM)
The electronic control system for the automatic transmission provides extremely precise control to make smooth shifting in all driving situations. Engine torque, clutch engagement, oil pressure, shifting time, shift timing and other factors are controlled by signals from the TCM in accordance with vehicle condition. The electronic control system is also equipped with a self diagnosis system which diagnosis malfunctions of electronically controlled components. The TCM receives the signal from each sensor and then sends the control signal to the transmission and the engine to make precise operation.
The TCM controls the operation of the clutches and brakes based on the shift pattern for each driving mode, Economy, Power, Winter. When shifting the transmission, the engine torque is controlled and the hydraulic pressure in the transmission is controlled to make smooth shifting in all driving situations.
The electronic shift system consists of the following components:
- TCM
- 2-3/3-4 Shift Solenoid (S1)
- 1-2/3-4 Shift Solenoid (S2)
- Line Pressure Control Solenoid (SLT)
- Lockup Control Solenoid (SLU)
- Neutral Switching Solenoid
- Transmission Input Speed Sensor (ISS)
- Transmission Output Speed Sensor (OSS)
- Transmission Fluid Temperature (TFT) Sensor
- Park/Neutral Position Switch