Electronic Control System

ELECTRONIC CONTROL SYSTEM

DESCRIPTION
The electronic control system used in the new generation auto transaxle is far superior to the previous systems. This system is able to adopt a variable shift pattern for smooth and problem free shifting. A solenoid valve is applied to each of the clutches and brakes and is independently controlled. Feedback control and correction control is performed in all gears as well as utilization of mutual control system to increase shift feeling. The torque converter damper clutch uses a partial lock up and full lock-up system. An additional control method called the HIVEC system (neural network) is adopted to increase shift feeling.

BLOCK DIAGRAM (CAN)

BLOCK DIAGRAM (CAN):

ELECTRIC CONTROL LOCATION
The TCM (PCM) is located on the intake manifold in the engine room.





OPERATING COMPONENTS AND FUNCTIONS

OPERATING COMPONENTS AND FUNCTIONS:

SPORTS MODE

SPORTS MODE SWITCH

SPORTS MODE SWITCH:

Sports mode allows the manual up-shift and downshift with the accelerator pedal is depressed. The prompt response and shift would be obtained due to the continuous shifting without cutting of driving power. The shifting time is also decreased about 0.1 sec during up-shift, 0.2 sec during downshift. As the selector lever is pushed upward or downward one time, the gear is up shifted or downshifted by one gear.

SIGNALS OF SPORTS MODE SWITCH

SIGNALS OF SPORTS MODE SWITCH:

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.

Frequency: 500 Kbit/sec





Input signals to TCM (PCM) through CAN communication
^ Engine rpm, TPS signal
^ A/CON 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