Legacy F4-2.5L SOHC (2003)
1 Range Control
Slip Control
Turning Control
ABS Control
P And N Range Control
AWD TRANSFER CLUTCH CONTROL (MPT MODELS)
AWD CENTER DIFFERENTIAL CONTROL (VTD MODELS)
Control Description
The TCM controls the engagement of the center differential's multi-plate clutch (LSD) using maps that are pre-programmed based on the throttle
opening and engine speed.It selects a map according to driving conditions and use it as the control basis.
Ordinary Control
The torque input to the multi-plate clutch is calculated according to various factors such as intake manifold pressure, torque converter turbine speed
and selected speed gear.Based on the calculation result, the basic coupling force of the clutch is determined.
The basic coupling force thus obtained is then corrected according to the road slipperiness (which is determined based on steering angle, yaw rate,
lateral G signals from the VDC control module) and the feedback correction factor which is used for making the actual yaw rate agree with the yaw
rate estimated from the steering angle sensor signals.
Start Control
When the vehicle speed is 0 km/h (0 MPH), the TCM makes control to generate differential action limiting torque that is proportional to the throttle
angle.
This enables the vehicle to start smoothly without swerving even on a slippery road.
Turning Control
The TCM makes a correction such that the input torque to the multi-plate clutch is reduced as the steering angle increases.
This function is performed to improves turning performance at certain vehicle speed range.
