Active Exhaust System

WARNING: This page is about a different car, the 2018 Land Rover Discovery Sport. However, it is still accessible from the selected car via links, so may be relevant.

The position of the acoustic exhaust valve set by the Powertrain Control Module (PCM) depends on engine speed and Accelerator Pedal Position (APP) sensor.

On vehicle start up, the acoustic exhaust valve is always open, to enhance the exhaust sound.

When the engine idle speed is above 900 RPM (e.g. cold start, or fast idle conditions), the PCM will close the active exhaust valves to reduce exhaust noise.

If the driver waits 5 seconds before engine start after the ignition is switched on, the active exhaust valves will close, and the vehicle performs a 'Quiet mode' start.

When the active exhaust system is activated by the PCM, the acoustic exhaust valve is open over the majority of the engine speed and load range. The acoustic exhaust valve is closed when driving in middle speed and load conditions, then open at high speed and load conditions. This serves to both enhance the sound quality in the vehicle, and reduce back pressure to enhance engine performance. This methods can further enhance the sporty driving experience. The PCM disables the active exhaust system during specific engine operating conditions.