Control and Functions
CONTROL AND FUNCTIONS
| Item | Description |
|---|---|
| Shift Control | The transmission gear is shifted according to the shift pattern selected by the driver. In shifting gears, the gear ratio is controlled by the ON/OFF signal using the shift solenoid S1 and the shift solenoid S2. |
| Torque Converter Clutch (TCC) Control | The clutch ON/OFF is controlled by moving the Lock-up control valve through shifting TCC linear solenoid. Transmission Control Module (TCM) controls the torque converter slip speed to be slight constant value by regulating the torque converter apply pressure through linear TCC solenoid. |
| Line Pressure Control | The throttle signal allows the current signal to be sent to the pressure control Pulse Width Module (PWM) solenoid. After receiving the current signal, the pressure control PWM solenoid activates the pressure regulator valve to regulate the line pressure. |
| On-Board Diagnostic System | Several malfunction displays can be stored in the TCM memory, and read out of it afterward. The serial data lines, which are required for the testing of the final assembly and the coupling to other electronic modules, can be regulated by this function. |
| Fail-Safe Mechanism | If there is a problem in the transmission system, the TCM will go into a "backup" mode. The vehicle can still be driven, but the driver must use the select lever to shift gears. |
| Torque Management Control | The transmission control side sends the absolute spark advance signal to the engine control side while the transmission is being shifted. This controls the engine spark timing in compliance with the vehicle running condition to reduce the shocks caused by the change of speed. |
| ATF Warning Control | The oil temperature sensor detects the ATF oil temperature to control the oil temperature warning, TCC, and the 3rd start mode. |
| Reverse Lock Out Control | With the selector lever in reverse position, while running the TCM will not allow to get in reverse gear until vehicle speed is below 5.8mph (11km/h). |
| Squat control | When the TCM detects D signal turns on at vehicle stop state, the TCM controls 1-3-1 shift to improve the shift feel at N. D. |
| Downhill Control | This mode is automatically activated from NORMAL mode to get moderate engine braking only when downhill conditions are recognized. |
| Uphill Control | This mode is automatically activated from NORMAL mode to avoid shift busyness only when uphill conditions are recognized. |