Toyota 4Runner: System Description

Toyota 4Runner Service Manual / Suspension / Suspension Control / Kinetic Dynamic Suspension System / System Description

SYSTEM DESCRIPTION

1. DESCRIPTION

(a) System description

In the KDSS (Kinetic Dynamic Suspension System), a cylinder is installed to each of the front and rear stabilizer bars. The front and rear cylinder upper chambers and the front and rear lower chambers are each connected by a pipe. The hydraulic circuit is filled with high-pressure suspension fluid. The stabilizer control ECU controls the stabilizer control solenoid valves according to input signals from sensor.

2. FUNCTION OF COMPONENTS

Part Name		Function
Stabilizer Control ECU		Closes the stabilizer control solenoid valves according to input signals from the sensor to cut the fluid flow to the accumulators. Turns on the KDSS indicator light in the combination meter to inform the driver when an abnormality is detected in the KDSS. When this happens, a DTC is stored.
Stabilizer Control with Accumulator Housing Assembly	Accumulator Pressure Sensor	Detects the pressure in the hydraulic circuit.
Stabilizer Control with Accumulator Housing Assembly	Stabilizer Control Solenoid Valve	Cuts the fluid flow to the accumulator according to a signal from the stabilizer control ECU.
Speed Sensor (Skid Control ECU)		Detects the wheel speed of each wheel.
Steering Angle Sensor		Detects the steering angle and amount of movement of the steering wheel, and then sends signals to the stabilizer control ECU.
Yaw Rate and Acceleration Sensor		Detects the yaw rate and acceleration of the vehicle and sends signals to the stabilizer control ECU.

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Problem Symptoms Table

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