Electronic control system (S4XA) (Honda Civic 5)

Contents: Switching control ⇊ Control of the locking system ⇊

The electronic control system consists of a transmission control unit (TCM) of sensors and four electromagnetic valves. Gear shifting and locking are controlled electronically, for the convenience of the driver under all driving conditions. The TCM unit is located below the instrument panel, behind the folding panel on the driver's side.

Switching control

The TCM instantly determines which gear should be selected based on various signals sent from the sensors and actuates the shift control solenoid valves A and B. A logical control system has been selected to control the shifting of the ID4L position during uphill, downhill or deceleration.

Control of the locking system

From the input signals of the sensors. The TCM determines whether to turn the lock ON or OFF and activates the electromagnetic valve of the lock control A and/or B, respectively. The combination of control signals to the electromagnetic valves A and B is shown in the table below.