Understeer Control
WARNING: This page is about a different car, the 2011 Jaguar XKR, 2011 Jaguar XK, 2010 Jaguar XKR, and 2010 Jaguar XK. However, it is still accessible from the selected car via links, so may be relevant.
Understeer Logic Control is a proactive system which monitors the vehicle for understeer by comparing signals from the yaw rate and lateral acceleration sensor with signals from the steering angle sensor and wheel speed sensors.
When the anti-lock brake system (ABS) module detects the onset of understeer, the anti-lock brake system (ABS) module signals the engine control module (ECM) via the high speed controller area network (CAN) bus to request a decrease in engine torque. At the same time the anti-lock brake system (ABS) module will control the hydraulic control unit (HCU) to apply brake pressure to the relevant wheels to correct the understeer.