Porsche Cayenne S owners manual page 239

text version of content this owner's manual page from owners manual to the vehicle Porsche Cayenne S, year of production 2002 - 2010:

The events below inform the driver of PSM control Combined use of PSM and PTM/PTM PlusOff-road PSM operations and warn him to adapt his driving style In order to ensure optimal stabilisation of the (PSM in Low Range program) to the road conditions: vehicle, the center differential lock (PTM) and When Low Range is active, an off-road PSM – The multi-functional information light in the in-possibly the rear differential lock (PTM Plus) are specially matched to off-road driving is activated strument panel lights up.also opened when PSM interventions occur.to enhance traction. – Hydraulic noises can be heard.Tip on driving At a speed below 22 mph (35 km/h) , the terrain – The vehicle decelerates and steering-wheel PSM intervenes later if the vehicle should unders- forces are altered as the PSM controls the When PSM is switched off, wheel-specific brake teer and thereby improves steerability in Low brakes. interventions and the traction control system Range. (TCS) are also inactive. If the brakes are highly stressed, the automatic – Reduced engine power. The automatic brake differential (ABD) remains on.brake differential (ABD) switches itself off to – The brake pedal pulsates and its position is protect the brakes. It remains deactivated until the changed during braking. brake system has cooled sufficiently. However, it is possible at any time to achieve full vehicle deceleration by increasing the foot Engine drag torque control pressure slightly. In conditions of excessive slip, the engine drag Examples of PSM control operations torque control system prevents all driven wheels from locking up when the car is overrunning. This – Vehicle understeers: is also the case for downshifts on a slippery road. If the front wheels of the vehicle drift on a cor- ner, engine power is reduced and the rear wheel on the inside of the corner is braked if necessary. – Vehicle oversteers: If the rear of the vehicle swings out on a cor- ner, the front wheel on the outside of the cor- ner is braked. Shifting Gear, Traction Systems 239

owners manual Porsche Cayenne S

owners manual Porsche Cayenne S - year of production: 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 - Porsche Cayenne S owners manual EN