Components

1. 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 A and the shift solenoid B.

2. BAND APPLY CONTROL. The band apply is controlled when in the 3-2 downshift (engine overrun prevention) and the garage shift (shock control). The band apply solenoid is controlled by the signal from the Pulse Width Modulation (PWM) to regulate the flow of the oil.

3. TORQUE CONVERTER CLUTCH CONTROL. The clutch ON/OFF is controlled by moving the converter clutch valve through shifting Torque Converter Clutch (TCC) solenoid using the ON/OFF signal.

4. LINE PRESSURE CONTROL. The throttle signal allows the current signal to be sent to the force motor. After receiving the current signal, the force motor activates the pressure regulator valve to regulate the line pressure.

5. ON-BOARD DIAGNOSTIC SYSTEM. Several malfunction displays can be stored in the Powertrain Control Module ([1][2]PCM) 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.

6 FAIL-SAFE MECHANISM. If there is a problem in the transmission system, the [1][2]PCM will go into a "backup" mode. The vehicle can still be driven, but the driver must use the select lever to shift gears.

7. TORQUE MANAGEMENT CONTROL. The transmission control side sends the absolute spark advance signal to the engine control side while the transmission is being shifted, to control the engine spark timing in compliance with the vehicle running condition to reduce the shocks caused by the change of speed.

8. AUTOMATIC TRANSMISSION FLUID (ATF) WARNING CONTROL. The oil temperature sensor detects the ATF oil temperature to control the oil temperature warning, TCC and the winter mode.

9. ANTI-LOCK BRAKE SYSTEM (ABS) CONTROL. When the select lever is at "L" or "R" range, a signal is sent to the ABS controller as one of the ABS control conditions.