4WD CONTROL MODULE FUNCTION

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• The 4-wheel drive (4WD) control module (CM) calculates the optimal amount of torque distribution for the rear wheels and outputs a corresponding electric current to the electronic control coupling (4WD solenoid). This calculation is based on the accelerator pedal angle, four-wheel speed, engine speed, and other related input signals, matched with the vehicle driving and road surface conditions.

Function table

Function name | Contents
--- | ---
4WD system control function | • Based on each input signal, the electronic control current sent to the electronic control coupling (4WD solenoid) is optimally controlled.
Diagnostic system | • If the self-diagnostic system detects a malfunction, the 4WD warning light illuminates to alert the driver, and at the same time the system suspends control or performs other measures to prevent a loss of driving stability and protect the system. • The detected malfunction is stored as a DTC in the 4WD CM.