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Table of Contents
Related Manuals for Porsche Cayenne V6 2008
Summary of Contents for Porsche Cayenne V6 2008
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Page 1: Service Information
® Service Information 2008 Technik Introduction Cayenne V6 & V8 (9PA) - Page 2 Important Notice: The contents of this Technik Introduction brochure was originally written by Porsche AG for its rest-of-world English speaking market. The electronic text and graphic files were then imported by Porsche Cars N.A, Inc. and edited for con- tent. Some equipment and technical data listed in this publication may not be applicable for our market. Specifications are sub- ject to change without notice.
- Page 3 Cayenne /S/T The Cayenne opens up a new chapter in its success story. Four years after the market launch of the model, Dr. Ing. h.c. F. Porsche AG presents the second generation of its sporty off-road vehicle. The new 2nd generation Cayenne, Cayenne S and Cayenne Turbo models have new, higher-performance engines with direct fuel injection (DFI).
- Page 4 Cayenne Turbo. This type of chassis can now be optimised using the new roll stabilization system Porsche Dynamic Chassis Control (PDCC), which Porsche has introduced for the first time. Continuous roll stabiliza- tion reduces the vehicleís lateral inclination during cornering and balances the vehicle in practically all driving situations.
- Page 5 Contents Cayenne /S/T Engine Fuel, Exhaust and Engine Electrics Transmission There are no new technical changes or modifications to the Diagnosis transmissions for M.Y. 2008. Chassis Adjustment Body Note Body Equipment, Exterior Any changes to this section are covered in section 5. Body Equipment, Interior Programming Any changes to this section are covered in section 5.
- Page 7 Part Number - PNA CAY 021 08...
- Page 8 1 - Engine M 48.01/51 Engine – Cayenne V8 General Contents Completely new engines have been developed for the Cayenne S and Cayenne Turbo for the 2008 model year. General ......15 The main development aims were: Cayenne S Engine Data .
- Page 9 Engine – Cayenne V8 Cayenne S Full Load Curve A - Power rating in kW B - Torque in Nm C - Engine speed Engine Data – Second Generation Cayenne S Engine type ........M48.01 No.
- Page 10 Cayenne Turbo Full Load Curve Engine – Cayenne V8 A - Power rating in kW B - Torque in Nm C - Engine speed Engine Data – Second Generation Cayenne Turbo Engine type ........M48.51 No.
- Page 11 Engine – Cayenne V8 Crankcase The crankcase in the Porsche Cayenne S and Cayenne Turbo is designed as a two-piece closed-deck component in a light metal alloy (AlSi17Cu4Mg). In the closed-deck design, the sealing surface of the crankcase is, for the most part, closed to the cylinder head, only the bores and channels for oil and coolant are exposed.
- Page 12 Engine – Cayenne V8 4 knock sensors Removed thermostat V8-4.5 V8-4.8 housing The lower part of the crankcase is machined and paired together with the upper part. To keep the weight as low as possible, the spheroidal graphite iron inserts are no longer used and the wall thickness has been reduced.
- Page 13 Engine – Cayenne V8 Torsional Vibration Balancer A torsional vibration balancer is used to reduce torsional vibrations on the crankshaft and to minimize component stress, e.g. on the belt drive. A shock absorber with the very best damping characteristics was selected because of the greater power impulses associated with direct fuel injection engines.
- Page 14 Cylinder Head Engine – Cayenne V8 Cylinder head water jacket. The cylinder head and camshaft mount is one joined component and is identical for the Cayenne S and Cayenne Turbo. Technical Data, Valve Drive Intake valve diameter ......38.3mm Intake valve lift, large .
- Page 15 Engine – Cayenne V8 Oil Supply in the Cylinder Head 1 - Oil supply to the chain tensioner 2 - Camshaft control system 3 - Valve lift control system 4 - Oil supply for valve lift control 5 - Oil supply for turbocharger 6 - Oil intake Camshaft Control With Valve Lift Control (VarioCam Plus) The requirements imposed on engine design with regard to higher...
- Page 16 Vane Controller Engine – Cayenne V8 The vane controller consists essentially of the stator (-A-), which is installed on the crankshaft via the sprocket, the rotor (-B-), which is installed on the camshaft, the inserted vanes and two lids. The sprocket is mounted to the outer diameter of the stator.
- Page 17 Engine – Cayenne V8 Solenoid Hydraulic Valve The solenoid hydraulic valve is designed as a 4-way proportional valve, which connects one of the two control lines (-A/B-) to the oil pressure supply line (-P-) depending on the control unit specification and opens the other line so that the oil can flow into the crank chamber (-T-line-).
- Page 18 Tappet Evolution Engine – Cayenne V8 Cayenne V8 engines use a “Ultra Leichtbau” lightweight 3CF bucket tappet. Advantages are: • Reduced mass • Increased rigidity Cylinder Head Design Previous Cylinder Head Second Generation Cylinder Head Additional weight savings were gained from the second generation V8 engine cylinder head design.
- Page 19 Engine – Cayenne V8 Scavenging Concept A scavenging restrictor is installed on the end of the control pressure line to keep the switching time to a minimum during valve lift control. This scavenging restrictor is used to bleed the line and reduce switching time.
- Page 20 an advancing camshaft. If the camshaft then tries to lag due to the high Engine – Cayenne V8 drive torque, the check valve closes and the oil cannot escape. The camshaft is driven by the oil cushion of the sprocket during this time, as with a freewheel.
- Page 21 Engine – Cayenne V8 Timing Drive Mechanism The chain is guided by two specially coated guide rails. The lower guide rail on cylinder row 1 to 4 is also designed as a tensioning rail. The hydraulic chain tensioner is connected to the engine oil circuit and is totally maintenance free.
- Page 22 Sprocket Engine – Cayenne V8 Illustration above shows the surface of the friction disk viewed under a microscope. The lower sprocket, which drives the timing chain and the chain for the oil pump, has a friction disk on the front (facing the pulley) and rear (facing the crankshaft) for improved torque transmission.
- Page 23 Engine – Cayenne V8 Lubricating Oil System A - Pressure oil channels B - Oil return channels To guarantee a reliable oil supply in all driving situations, the V8 engines in the Cayenne S and Cayenne Turbo have an integrated dry-sump lubri- cation system.
- Page 24 Engine – Cayenne V8 The oil pan is designed in two parts and has an upper and lower part. The oil-water heat exchanger and the oil filter are fitted directly on the upper part of the oil pan. To ensure a lightweight design, the windage tray, the oil return collection tank and the suction pipe are all together in a plastic housing fitted in the oil pan.
- Page 25 Engine – Cayenne V8 Oil Pump The integration of VarioCam Plus, the mechanical vacuum pump and the fact that the lower part of the crankcase is fully aluminum means that oil throughput on the Cayenne S and Cayenne Turbo is very high. A rela- tively large and efficient pump must be used to guarantee the required oil supply.
- Page 26 Engine – Cayenne V8 Reduction of friction losses by variable oil flow Delivery rating of a constant pump Reduced friction losses by controlled oil flow Engine oil displacement = Delivery rating of oil flow regulating pump Reduction of friction losses by variable oil pressure Conventional pressure curve due to delivery rating w/o pressure regulation p_oil...
- Page 27 Engine – Cayenne V8 Oil Spray Jets The temperature of the pistons in the Cayenne S and Cayenne Turbo engine is reduced by means of spray cooling. The spray jets are fitted on the upper part of the crankcase. The spray oil is also used for improved lubrication of the cylinder lining.
- Page 28 Positive Crankcase Ventilation – Naturally Aspirated Engine Engine – Cayenne V8 1 - Return connection for blow-by gases 2 - Return line 3 - Tank vent 4 - Positive crankcase ventilation Positive Crankcase Ventilation - Turbo Engine The positive crankcase ventilation system in the Cayenne Turbo can reduce the amount of fuel that goes into the engine oil during combus- tion.
- Page 29 Engine – Cayenne V8 Cayenne S Cooling System 1 - Coolant reservoir 2 - Heat exchanger 3 - Coolant collection pipe 4 - Coolant pump/thermostat housing 5 - Cylinder head 6 - Crankcase 7 - Oil-water heat exchanger 8 - Generator 9 - Radiator Page 1.36...
- Page 30 Cayenne Turbo Cooling System Engine – Cayenne V8 1 - Coolant reservoir 2 - Heat exchanger 3 - Coolant collection pipe 4 - Coolant pump/thermostat housing 5 - Cylinder head 6 - Crankcase 7 - Oil-water heat exchanger 8 - Generator 9 - Radiator 10 - Turbocharger Page 1.37...
- Page 31 2 - Fuel & Ignition Fuel, Exhaust & Engine Electrics General Contents The main focus here is on new developments and modifications compared to previous Cayenne models. General ......1 Cayenne direct fuel injection (DFI) .
- Page 32 • Modifications to the cylinder head. • Special recessed pistons for the relevant engine. Porsche is using direct fuel injection (DFI) for the first time in its new generation of Cayenne engines. DFI offers numerous advantages compared to intake manifold injection. The main objective here is to...
- Page 33 Start Phase of DFI Engines Fuel, Exhaust & Engine Electrics High pressure stratified charge ignition is used in the DFI systems of the new Cayenne engines in order to optimize cold starting with regard to fuel consumption and emissions. With this ignition system, fuel injection occurs very late –...
- Page 34 Fuel, Exhaust & Engine Electrics Note! Intake manifold injection > With the intake manifold injection system, the fuel is injected into the intake duct earlier and mixture formation takes place partly in the intake duct and partly in the combustion chamber. During the intake process, fuel is deposited on cylinder walls and valves and as a result, this fuel is no longer available for combustion.
- Page 35 Cayenne V6 DFI Engine Fuel, Exhaust & Engine Electrics On the new Cayenne V6 engine, displacement has been increased by 0.4 liters to 3.6 liters with a compression ratio of 12.25. Engine power has increased by 40 HP to 290 HP, while the torque is now 285 ftlb. (385 Nm), an increase of +56 ftlb.
- Page 36 Fuel, Exhaust & Engine Electrics Motronic Control Units MED 9.1 The new DME control unit MED 9.1 from Bosch has been specially adapted to suit direct fuel injection and the modified engine specifications of the V6 DFI engine. It can be programmed with the country-specific data records of the Cayenne V6.
- Page 37 Piston Recesses Fuel, Exhaust & Engine Electrics The piston recesses -1- on the V6 engine have been adapted for the purpose of achieving optimal stratification of the air/fuel mixture during the late injection processes that characterize high pressure stratified charge ignition as well as during the catalytic converter heating phase. The compression ratio has been increased from 11.5:1 to 12.25 due to improved inner cooling.
- Page 38 Fuel, Exhaust & Engine Electrics Cayenne V8 DFI Engines The totally redesigned family of V8 engines includes a naturally aspirated engine for the new Cayenne S and a turbocharged version for the new Cayenne Turbo. Specific design work and tuning has resulted in an identical parts concept between the naturally aspirated and turbo engine.
- Page 39 Cayenne S DFI Engine Fuel, Exhaust & Engine Electrics On the new V8 naturally aspirated engine in the Cayenne S, the displace- ment has been increased by 0.3 liters to 4.8 liters with a compression ratio of 12.5. Engine power has been increased by 45 HP to 385 HP, while the torque is now 370 ftlb.
- Page 40 Fuel, Exhaust & Engine Electrics Fuel Supply The engine is designed to provide optimum performance and fuel consumption if unleaded premium fuel with 93 octane ( ) is used. If unleaded premium fuels with a lower octane number is used, the engine’s knock controller automatically adapts the ignition timing.
- Page 41 Functional diagram of the low pressure side in the fuel tank. Fuel, Exhaust & Engine Electrics Fuel Pressure On The Low Pressure Side. T - Tank filler neck R - Fuel pump unit in right side of tank For DFI engines, the fuel pressure on the low pressure side has been - Fuel pump unit in left side of tank increased to approx.
- Page 42 Fuel, Exhaust & Engine Electrics Fuel High Pressure System in DFI Engines The fuel high pressure system generates an injection pressure of up to 1740 psi (120 bar) in the combustion chamber. The components of the V6 engine and the V8 engines are different. The following pages describe the functions of the components of the V6 DFI engine first, and then those of the V8 DFI engines.
- Page 43 Fuel, Exhaust & Engine Electrics Note Pressure variations can occur on the low pressure side while measuring fuel pressure at idling speed due to the piston pump on the high pressure side with one piston. Technical Manual Always read and observe the specifications in the Technical Manual when securing all fuel lines in the high pressure area.
- Page 44 Fuel, Exhaust & Engine Electrics Fuel Injectors/High Pressure Injectors The electromagnetically operated fuel injectors are located in the cylinder head. They are activated by the Motronic control unit in accor- dance with the firing order. Following activation, they inject fuel directly into the combustion chamber at a pressure of 580 psi (40 bar) to 1740 (120 bar).
- Page 45 Fuel High Pressure System in V8 DFI Engines Fuel, Exhaust & Engine Electrics 1 - Fuel high pressure pump with flow control valve, pressure control valve and tempera- ture compensator 2 - High pressure line 3 - Fuel rail 4 - Fuel pressure sensor 5 - Fuel line (for fuel injector on cylinder 1) 6 - Fuel injector (cylinder 5) 7 - Retainers for two fuel injectors...
- Page 46 Fuel, Exhaust & Engine Electrics Cayenne V8 Naturally Aspirated Engine The high pressure pump used in the Cayenne S is a three-piston pump with a maximum delivery rate of approx. 47.5 gals./180 liters/h at 1740 psi (120 bar). It builds up pressure and ensures flow control. The following components are integrated into the high pressure pump: Flow control valve with pressure reducing function for the fuel high pressure side, pressure control valve, bypass valve, a temperature compensator...
- Page 47 Fuel, Exhaust & Engine Electrics 1 - Low pressure (approx. 80 psi/5.5 bar from the fuel tank) 2 - Wobble plate 3 - Fuel high pressure pump 4 - Flow control valve (for fuel high pressure) 5 - High pressure line to fuel rail Bypass Valve (including pressure relief valve) Arrow in illustration is wobble plate.
- Page 48 Fuel, Exhaust & Engine Electrics Central High Pressure Rail The central high pressure rail in V8 engines is located in the engine’s inner V. From here, the fuel is supplied via individual lines to the fuel injectors for cylinders 1 to 8. The high pressure rail provides the same pressure for all injectors.
- Page 49 Fuel Injector Retainer Components Fuel, Exhaust & Engine Electrics A - Buffer B - Disc spring C - Lock washer D - Rib to prevent in correct assembly Fuel Pressure Sensor The fuel pressure sensor is installed on the central high pressure rail under the intake system and informs the Motronic control unit about the current pressure in the fuel high pressure system.
- Page 50 Fuel, Exhaust & Engine Electrics Fuel Injectors/High Pressure Injectors The electromagnetically operated fuel injectors are on the intake side of the cylinder head. They are activated by the DME control unit in accor- dance with the firing order. Following activation, they inject fuel directly into the combustion chamber at a pressure of 580 psi (40 bar) to 1740 psi (120 bar).
- Page 51 In addition to the amount of fuel injected and the injection time, the Fuel, Exhaust & Engine Electrics shape and alignment of the fuel jet is also important. S - Spray angle (taper angle of the fuel jet, approx. 69° on the naturally aspirated engine, 68°...
- Page 52 Fuel, Exhaust & Engine Electrics Ignition System General The ignition systems used in the V6 and V8 engines largely correspond to the systems used in previous engines. The ignition system map in the DME control unit has been designed to meet DFI specific requirements. V6 DFI Engine Knock Sensors One knock sensor is bolted to the crankcase on the left -KL- and...
- Page 53 V8 DFI Engines Fuel, Exhaust & Engine Electrics Knock Sensors All V8 DFI engines have four knock sensors arranged in the V of the engine block. These four knock sensors are required for exact knock detection in V8 DFI engines since stronger vibrations are transmitted to the cylinder head via the fuel injectors during high pressure fuel injection.
- Page 54 Fuel, Exhaust & Engine Electrics Cayenne S Spark Plugs The V8 naturally aspirated engine has nickel-yttrium spark plugs with four ground electrodes, which must be changed every 36,000 miles (60,000 km) or after 4 years according to the Technical Manual. The four ground electrodes are arranged around the ceramic insulator in these surface gap spark plugs.
- Page 55 Intake Air Side, Air Routing Fuel, Exhaust & Engine Electrics General The intake systems in all new Cayenne models have been redesigned for direct fuel injection (DFI) in order to achieve a high torque curve. The air cleaner elements must be changed every 72,000 miles (120,000 km) or after 4 years according to the Technical Manual.
- Page 56 Fuel, Exhaust & Engine Electrics Long Intake Manifold For High Torque 1 - Electronic throttle 2 - Torque accumulator 3 - Power accumulator 4 - Electropneumatic shift valve 5 - Vacuum unit 6 - Operating sleeves (sealed) The operating sleeves in the intake system move into torque position when the engine is started and until an engine rpm of 4200 is reached and this is apparent from the repositioning of the operating sleeves (in direction of travel at the left front of the intake manifold).
- Page 57 Cayenne S Intake System Fuel, Exhaust & Engine Electrics 1 - Air intakes behind the left and right headlights 2 - Left and right air filter housings (with sound opening) 3 - Left and right pipe mass airflow sensors 4 - To electronic throttle 2 The illustration shows the intake system, from the air intakes behind the left and right headlights, the air filter housings with sound opening and the two pipe mass air flow sensors to the electronic throttle.
- Page 58 Fuel, Exhaust & Engine Electrics The DME control unit activates an electropneumatic shift valve, which switches a vacuum to the diaphragm cell. The switching flaps for cylinder bank 1 and 2 are actuated synchronously via a connecting link. In the torque setting up to approx. 4150 rpm, the long intake manifold is effective with a length of approx.
- Page 59 Cayenne Turbo Intake System Fuel, Exhaust & Engine Electrics 1 - Air intakes behind the headlights 2 - Left and right air filter housings 3 - Leftand right pipe mass airflow sensors 4 - Left turbocharger (right turbocharger is behind the charge air cooler) 5 - Left and right charge air cooler 6 - Pressure sensor with temperature sensor 7 - To electronic throttle...
- Page 60 Fuel, Exhaust & Engine Electrics Positive Crankcase Ventilation – Cayenne Turbo With the enhanced positive crankcase ventilation system, it was possible to reduce the amount of fuel produced during combustion and entering the engine oil through the combustion gases, which pass the piston rings and penetrate the crankcase (blow-by gases).
- Page 61 Exhaust System, Emission Control Fuel, Exhaust & Engine Electrics General The exhaust systems in all new Cayenne models have been redesigned for direct fuel injection (DFI) in order to achieve maximum performance with minimum emissions. All exhaust systems include the following: •...
- Page 62 Fuel, Exhaust & Engine Electrics Cayenne S Exhaust System 1 - Pre-catalytic converters (ceramic substrate) 2 - Decoupling elements 3 - Main catalytic converters (metal substrate) 4 - Crossover pipe 5 - Muffler 6 - Exhaust tailpipes with trim The new Cayenne S features an enhanced exhaust system. To keep emissions to a minimum, it is important that the catalytic converter reaches its optimal operating temperature quickly.
- Page 63 Cayenne S Sports Exhaust System (Optional only for Tiptronic S) Fuel, Exhaust & Engine Electrics 1 - Dual flow exhaust system 2 - Sports exhaust system muffler 3 - Vacuum line for activation 4 - Diaphragm cell for switching 5 - Two tailpipes at the left and right with twin- tailpipe trim A sports exhaust system is offered for the first time for the new Cayenne S.
- Page 64 Fuel, Exhaust & Engine Electrics Cayenne Turbo Exhaust System 1 - Pre-catalytic converters (metal substrate) 2 - Decoupling elements 3 - Main catalytic converters (metal substrate) 4 - Muffler 5 - Tailpipe at the left and right with twin-tailpipe trim Compared to the previous model, this exhaust system has been designed specifically to suit the new DFI engine in the Cayenne Turbo.
- Page 65 Turbocharger Fuel, Exhaust & Engine Electrics 1 - Exhaust manifold 2 - Exhaust turbine 3 - Flange to pre-catalytic converter 4 - Pressure unit for boost pressure control through the bypass valve (wastegate) 5 - Intakeside (from air filter) 6 - Pressure side (to charge air cooler, elec- tronic throttle) The two turbochargers are arranged in parallel.
- Page 66 Fuel, Exhaust & Engine Electrics Other Functions Of The DME Control Unit VarioCam Plus Control on V8 DFI Engines VarioCam Plus technology is used for the first time in V8 engines in the Cayenne model range. This system, which may be familiar to you from the current sports car generation, enables intake valve lift switching in addition to intake camshaft adjustment.
- Page 67 (PDCC). To meet the high requirements with regard to the braking performance of a Porsche, all new Cayenne models have a brake system that is opti- mally designed to suit the relevant vehicle features. A higher performance turbo brake system is used, especially on the Cayenne Turbo.
- Page 68 Chassis Porsche Dynamic Chassis Control (PDCC) The chassis control system Porsche Dynamic Chassis Control (PDCC), which is available on request for all new Cayenne models, can further optimize the already excellent driving dynamics. PDCC is only available for vehicles with air suspension and PASM. The silver colored chassis control switches on the center console and the logo “PDCC”...
- Page 69 The actual benefits of the system for customers are apparent in Chassis the following areas: • Reduced lateral inclination (vehicle lean) during cornering. • Greater agility. • Improved driving performance. • Increased driving comfort. • Better off-road functionality. Operating Principle The entire system involves chassis components used to actively stabilize the vehicle.
- Page 70 Chassis PDCC is an active roll stabilization system, which records the vehicle’s lateral inclination during cornering right from the start and reduces this considerably. This is done using active anti-roll bars on the front and rear axle, which ensure stabilization torques on both axles. This means that the active anti-roll bars build up specific forces to coun- teract the lateral inclination of the vehicle, depending on the steering lock and lateral acceleration.
- Page 71 Design/Components Chassis PDCC includes a two-piece anti-roll bar with a hydraulic swivel motor, a high pressure oil pump with lines and power distributor, valve blocks for activating the swivel motors and a control unit for each axle. Anti-roll Bar With Swivel Motor The core elements of the system are the active anti-roll bars with hydraulic swivel motors, which are integrated on front and rear axle instead of the conventional mechanical anti-roll bars.
- Page 72 Chassis Rear-Axle Valve Block 1 - Pressure sensor 2 - Pressure sensor 3 - Pressure regulating valve 4 - Direction valve The valve block comprises two pressure sensors (-1- and -2-), a pressure regulating valve (-3-) and the direction valve (-4-). The valve block is installed on the left rear-axle suspension subframe.
- Page 73 Tandem Pump Chassis A tandem pump driven by the drive belt for auxiliary units is responsible for supplying hydraulic pressure. A small fluid reservoir on the pump serves as a pressurized shock absorber. Pressure is controlled on the relevant valve blocks since the pressures in the swivel motors are different.
- Page 74 Chassis Operation and Display Concept Porsche Dynamic Chassis Control can be operated using the same chassis control switches Normal, Comfort and Sport that are used for PASM. PASM and PDCC are configured together, depending on which of the three chassis control programmes is selected.
- Page 75 This increases the vehicle’s lateral inclination during cornering. The vehicle responds by understeering slightly, but can be driven at an appropriate speed to the nearest authorized Porsche dealer. Page 4.9...
- Page 76 Chassis Tire Pressure Monitoring (2nd generation) Timely detection of a gradual loss of pressure not only increases driving safety, but can also prevent uneven tire wear and high fuel consumption. The optional Tire Pressure Monitoring system (TPM) has therefore been available for all Cayenne models since 2003.
- Page 77 Control Unit Chassis As in previous models, the control unit is located above the mounting saddle for the foot operated parking brake in the driver’s footwell. The control unit analyses the incoming data from the antenna and forwards the relevant information to the instrument cluster. Since the data is transmitted via cable from the central antenna, the control unit is designed to pick up both frequencies (433 RoW/315 MHz USA/Canada).
- Page 78 Chassis Central Antenna Note The central antenna is designed to pick up various frequencies (433 RoW/315 MHz USA/Canada). The digital central antenna (reception frequency 315) is secured close to the center of the underside of the left side member under the vehicle and is protected from stone damage by the sill cover.
- Page 79 Chassis A - Wheel electronics unit “1st Generation” B - Wheel electronics unit “2nd Generation” External features of the new, trigger-activated wheel electronics unit “1st gener- ation” vs. “2nd generation.” The following aspects of the system have been optimized by changing the system hardware and software: Fast learning following a wheel change.
- Page 80 Chassis Partial Monitoring If a spare wheel without a wheel sensor is mounted in the event of a flat wheel, a unique allocation of the remaining wheel electronics units can still be detected by the trigger system. In this case, the system remains active both when an emergency spare wheel or a spare wheel with no wheel sensor is used, as well as if one or two sensors fail (e.g.
- Page 81 Chassis To meet the high requirements with regard to the braking performance of a Porsche, all new Cayenne models have a brake system that is optimally designed to suit the relevant vehicle features. The brake systems can be identified visually as follows: A - Cayenne V6 –...
- Page 82 Chassis Cayenne Turbo To achieve the best deceleration values even with the significantly improved performance of the new Cayenne Turbo, it now features an improved turbo brake system with the following enhanced components: • Larger brake discs • Reinforced brake calipers •...
- Page 83 PSM (Porsche Stability Management) Chassis Like the current 911 models with all-wheel drive, the new Cayenne models also feature enhanced Porsche Stability Management (PSM). PSM improves active safety thanks to the following additional functions: • Enhanced braking readiness • Brake assist function •...
- Page 84 5 – Body Body General Contents General ......1 Body shell ..... . .2 Body –...
- Page 85 Body Body Shell The exterior body panelling received new design elements while the underling body shell structure components basically remained unchanged from the previous model. The second generation Cayenne’s design criteria carried over from the previous models: • Excellent static and dynamic body stiffness. •...
- Page 86 Body – Front Body The front end changes included new front lights that have a flatter basic shape, which makes all new Cayenne models look wider. The fact that the mid-point of the outer light unit for the headlights has been shifted further out also adds to this look.
- Page 87 Body Body – Rear The rear end changes included new tail lights that have also been redesigned with LED technology. In addition to the white backup lights, the shape of the rear lights has also been adapted to suit the new rear end design.
- Page 88 Option 1 – Press the release button on the rear lid. The vehicle must be unlocked in this case. The vehicle does not have to be unlocked if it has Porsche Entry & Drive. You simply need to have the vehicle key with you, e.g. in your pocket.
- Page 89 Body Closing The Rear Lid Automatically Make sure that the load is not too close to the rear lid when closing it because otherwise the process for closing the rear lid will be aborted and the rear lid will stop and not fully close and lock. Press the button in the rear lid trim.
- Page 90 Setting The Opening Height Of The Rear Lid Body The opening height of the rear lid can be set individually, for example, so that the rear lid will not hit the garage ceiling. The vehicle height depends on the level settings for vehicles with level control. Use these steps: 1.
- Page 91 Body System Overview The automatic rear lid has an actuating unit with a hydraulic pump and a spring-supported hydraulic cylinder. A - Hydraulic cylinder with spring B - Hoses C - Hydraulic pump D - Support Component Overview A - Support B - Quick-connectors C - Sound capsule D - Hydraulic cylinder...
- Page 92 Hydraulic Operating Schematics Body Rear lid opening. Rear lid closing. Page 5.9...
- Page 93 Body Checking Hydraulic Oil Level Before checking oil, open and close rear lid 2-3 times automatic to remove any air in the system. • High oil level – Pressure in the tank could be too high during manual operation! • Low oil level – Pump noises due to air in system, incomplete opening and closing function! Hydraulic Pump The hydraulic pump comprises an electric motor, the actual pump and...
- Page 94 Airbags Body All Cayenne models are equipped with dual front Advanced Airbags that offer upper-body protection with an added degree of intelligence. A weight sensor in the passenger seat automatically switches the passenger side bag off when unoccupied or fitted with a child seat. These are augmented by a side-impact protection system featuring a thorax airbag in each front seat.
- Page 95 9 – Electrics/Electronics Electrics General Contents The front lights and tail lights play an important role in styling the appearance of the new Cayenne models and add to the new, dynamic H7 headlights .....2 and sporty exterior design.
- Page 96 Electrics H7 Headlights The clear glass look gives an unrestricted view of the new technologies that are used here. The Cayenne and Cayenne S come with H7 projector-type headlights as standard. The light from the light source is projected onto the road via a reflector and a lens and thus allows homo- geneous illumination with significantly less dazzling of oncoming traffic.
- Page 97 Headlight Control Unit Electrics The headlight control unit only performs functions and supports the acti- vation of required actuators in the headlight. The necessary data is provided via CAN or via a direct connection for the headlight control unit. The headlight control unit is not a “light master” and does not Notes decide which light is switched “ON”.
- Page 98 Electrics High Beam, Auxiliary Main Beam, Headlight Flasher The control motor for high beam activation is hard wired to the vehicle electrical system control unit (light master). The headlight control unit is not responsible for activating the high beam headlight in the headlight Notes module variants.
- Page 99 The static cornering light, with a beam angle of approx. 30° with Electrics respect to the direction of travel (controlled by the steering angle), provides better illumination of the road in the direction of the steered corner (e.g. when turning) when the vehicle is stationary or when travel- ling at speed up to 80 mph (130 km/h).
- Page 100 Electrics Dynamic Cornering Light The steering angle, vehicle speed and yaw rate serve as input values for controlling the dynamic cornering light, which is integrated in the Bi- Xenon light unit. This provides optimal illumination of the road during cornering. The course of the road and any obstacles are detected ear- lier.
- Page 101 Automatic Range Adjustment Electrics The automatic range adjustment function is integrated in the headlight control unit. The dynamic range adjustment system keeps the inclination of the light rays (dipped beam Bi-Xenon module and static cornering Notes light) at the preset value of -1 % independently of the vehicle’s load so The system is adapted to the different that neither the vehicle’s load nor the pitching movements resulting from types of vehicles by programming the...
- Page 102 Electrics Automatic Range Adjustment – Poor Road Surface/Off-road Detection The automatic range adjustment system includes a function for detecting poor road surfaces/off-road conditions, which counteracts the continual adjustment behavior by using a filter system that significantly reduces actuation of the stepping motors or shutting them down completely.
- Page 103 Calibration Electrics The self-levelling sensors must be calibrated on vehicles “with steel springs”. The self-levelling sensors must be calibrated before adjusting the lights as part of the “vehicle handover”. Re-calibration is only required following repairs, adjustment work on the chassis, replacement of the headlight control unit or replacement of the self-levelling sensors.
- Page 104 Electrics Tail Lights 1 - Reflector 2 - Side marker light with 4 - LEDs 3 - Rear fog light 4 - Direction indicator light 5 - Backup light 6 - Tail light/brake light with 16 LEDs Notes The lense area of the direction indicator The tail lights on the Cayenne models as of model year 2008 are light (4) is darker for the USA/Canadian designed as a single unit and combine the indicator light, rear fog lights...
- Page 105 Vehicle Electrical System Management Electrics The main function of the vehicle electrical system control unit is to protect the battery against excessive cyclical loads. Since functions that are relevant to the driver are controlled by vehicle electrical system management and technical safety must be assured at all times, a lot of input data is required on the vehicle electrical system control unit.
- Page 106 Electrics Nominal Battery Voltage The default voltage for the generator is based on the temperature dependent maximum permitted battery voltage. The voltage range that can be set as the generator output voltage over the interface is between 13.5 volts and 15 volts. Since the battery temperature cannot be measured directly, the battery temperature is determined from a map using replacement values.
- Page 107 Vehicle Electrical System Control Unit Electrics A - CAN drive B - Gateway control unit C - CAN Comfort D - Engine control unit (DME) E - Vehicle electrical system control unit 1 - Engine rpm 2 - Idling rpm increase 3 - Coolant temperature 4 - DF signal 5 - Battery voltage...
- Page 108 Electrics Porsche Rear Seat Entertainment System Available as a factory installed option is the new and substantially improved Porsche Rear Seat Entertainment System. This system includes: • two video displays, • one media player, • two wireless infrared headphones and, •...