Logical selection system of control modes (Honda Civic 5)

How it works:

The TCM compares the current driving conditions with the conditions stored in its memory based on input data from the engine speed sensor, throttle position sensor, engine coolant temperature sensor, brake application signal and shift lever position signal to control shifting during uphill, downhill or deceleration.

Load increase control

When the TCM detects that the vehicle is climbing a hill in the [D4] position, the system expands the 3rd gear operating area to prevent the transmission from frequently shifting between 3rd and 4th gears, so the vehicle can move smoothly and have more power when needed.

Note:

• The shift pattern between 3rd and 4th gear is stored in the TCM, allowing the TCM's "Flexible Logic" to automatically select the most appropriate gear according to the grade.
• "Flexible logic" is a form of artificial intelligence that allows computers to respond to changing conditions in the same way as the human mind does.

Load shedding control

When the TCM detects that the vehicle is descending a hill in the [D4] position, the gear shift from 3rd to 4th when the throttle is closed becomes faster than on a flat road by widening the 3rd gear area.



This, combined with engine braking when decelerating, helps to achieve a smooth ride when the car is going downhill.

There are two load increase modes with different 3rd gear control areas, according to the incline value stored in the TCM.

When the vehicle is in 4th gear and you brake down a gentle hill, or when you apply the brakes on a steep hill, the transmission will downshift to 3rd gear. As you increase speed, the transmission will return to 4th gear.

Slowdown control

When a car passes through a turn and it needs to slow down first and then accelerate, the TSM sets up deceleration control data to reduce the number of transmission shifts. When the car decelerates from 48 km / h, the TSM shifts the transmission from 4th to 2nd gear earlier than under normal conditions, coping with the increasing acceleration.

Component Location (S4XA)