System Description [09/2014 - ]
WARNING: This page is about a different car, the 2020 Lexus GS 350, 2019 Lexus GS 350, and 2018 Lexus GS 350. However, it is still accessible from the selected car via links, so may be relevant.
- FUNCTION OF MAIN COMPONENTS
Component Function Combination meter assembly Multi-information display (AWD warning) Displays a warning to the driver when the system malfunctions. Slip indicator light Notifies driver that the current road surface is slippery. Stop light switch assembly Detects the brake operation. Throttle position sensor (throttle body assembly) Detects the opening angle of the throttle. Park/neutral position switch assembly Detects the "P" position. Steering sensor Detects turning of the steering wheel. Transfer control solenoid assembly Controls hydraulic pressure of the center differential control limiting clutch using signals from the 4WD ECU assembly. Skid control ECU (brake actuator assembly) Detects the signals from each sensor and outputs them to the 4WD ECU assembly. 4WD ECU assembly Detects the signals from each sensor via the skid control ECU (brake actuator assembly) to operate the transfer control solenoid assembly and control the system. - DRIVING FUNCTION
Vehicle Condition Status Control at vehicle start up This controls the amount of sideway sliding that occurs at the rear of vehicles when accelerating from a stop to improve acceleration and hill climbing capacity. Slip control at vehicle start up This helps prevent the vehicle from sliding sideways, to accelerate from a stop with the steering wheel turned and ensures a stable start up and steerability. Slip control This ensures high turning performance and stability not affected by road surface conditions during mid and high speed running. Control during acceleration This controls straight-line running when accelerating during mid and high speed running to ensure straight-line capacity and stability of the vehicle.