Shift Control and Lock Up Control

Using the vehicle speed and the position of the throttle the TCM operates the automatic shifting control by switching the 2-3 Shift Solenoid Valve Assembly S1 (313), the 1-2/3-4 Shift Solenoid Valve Assembly S2 (316) on and off for each transmission gear. The lock up control solenoid SLU (310) is also switch on and off according to operate the lock up control.

The AF 17 has the capability to change some of the running modes automatically when a certain specific condition is satisfied. The AF 17 is always in the "Economy mode". The "Winter mode" is operated by a switch on the shifter control panel.

• Driver's adaptive shift control (Economy mode, Power mode)

  Economy mode is used for normal driving condition after the ignition is ON. The driver's driving habits are detected by the using fuzzy logics from the accelerator pedal operation. This control changes shift points to Economy mode (low speed) and Power mode (high speed) according to the drivers driving habits.

• Winter Mode

  The mode is used to start moving the vehicle on slippery roads by activating the winter mode switch. The transmission will be in 3rd gear.