Porsche Cayenne I 1 owners manual page 184

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

10_Cayenne_21_KW17.book Seite 184 Donnerstag, 9. April 2009 3:33 15 The events below inform the driver of PSM control – Brake system prefilling:Off-road PSM operations and warn him to adapt her/his driving The brake system is prepared for possible sub-(PSM in Low Range program) style to the road conditions:sequent emergency braking if the accelerator When Low Range is active, an off-road PSM – The multi-functional information light in the pedal is released suddenly and quickly.specially matched to off-road driving is activated instrument panel lights up.The brake system is prefilled and the brake to enhance traction. pads are already applied gently to the brake – Light in the PSM Off button flashes.discs. In order to improve driveability on difficult terrain, – Hydraulic noises can be heard.– Brake booster: the response of the off-road PSM is less sensitive In the event of an emergency braking operation in the low speed range when the vehicle is opera- – The vehicle decelerates and steering-wheel where the pedal force is insufficient, a brake ted in the Low Range off-road driving program. forces are altered as the PSM controls the booster provides the braking pressure neces-If the brakes are highly stressed, the automatic brakes. sary for maximum deceleration at all 4 wheels.brake differential (ABD) switches itself off to – Reduced engine power. protect the brakes. It remains deactivated until the – The brake pedal pulsates and its position is Combined use of PSM and PTM/PTM Plusbrake system has cooled sufficiently. changed during braking.In order to ensure optimal stabilization of the ve-Engine drag torque control In order to achieve full vehicle deceleration, hicle, the center differential lock (PTM) and possib- foot pressure must be increased after begin-ly the rear differential lock (PTM Plus) are also In conditions of excessive slip, the engine drag ning of the brake pedal pulsing.opened when PSM interventions occur.torque control system prevents all driven wheels from locking up when the car is passing. This is Examples of PSM control operationsTip on driving also the case for downshifts on a slippery road. – If the front wheels of the vehicle drift on a When PSM is switched off, wheel-specific brake in- corner, engine power is reduced and the rear terventions and the traction control system (TCS) wheel on the inside of the corner is braked if are also inactive. necessary. The automatic brake differential (ABD) remains on. – If the rear of the vehicle swings out on a corner, the front wheel on the outside of the corner is braked. 184 Driving and Driving Safety

owners manual Porsche Cayenne

owners manual Porsche Cayenne - year of production: 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 - Porsche Cayenne I 1 owners manual EN