4WD CONTROL MODULE

id031800171000


Purpose, Function

•  The 4WD 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.


Construction

•  The 4WD CM is located as shown in the figure.

L.H.D.

ac9wzn00001028

R.H.D.

ac9wzn00001066

Block Diagram

ac4ccn00000617


Fail-safe

DTC

Fail-safe
P164D:00
Operates at initial value
P182F:00
Rear wheel torque zero (looked in 2WD)
P187B:00
Rear wheel torque zero (looked in 2WD)
P1886:00
Rear wheel torque zero (looked in 2WD)
P1887:11
Rear wheel torque zero (looked in 2WD)
P1887:12
Rear wheel torque zero (looked in 2WD)
P1887:13
Rear wheel torque zero (looked in 2WD)
P1887:14
Rear wheel torque zero (looked in 2WD)
P1888:11
Rear wheel torque zero (looked in 2WD)
P1888:15
Rear wheel torque zero (looked in 2WD)
P188A:00
Rear wheel torque zero (looked in 2WD)
U0001:88
Rear wheel torque zero (looked in 2WD)
U0100:00
Rear wheel torque zero (looked in 2WD)
U0101:00
Part of control disabled
U0121:00
Rear wheel torque zero (looked in 2WD)
U0401:68
Rear wheel torque zero (looked in 2WD)
U0402:68
Part of control disabled
U0415:68
Rear wheel torque zero (looked in 2WD)
U2100:00
Operates at initial value