2002-2008 Porsche Cayenne Petrol & Diesel Service & Repair Manual

2003-2008 BRAKES Anti-Lock Brake System (ABS) 45 IN INFORMATION ON PSM - AS OF MY 2003 (CAYENNE TIP, CAYENNE S TIP, CAYENNE TURBO, CAYENNE TURBO S) INFORMATION ON PSM PSM is an active control system to stabilize the vehicle at the limit of driving dynamics. Sensors continuously determine:  Vehicle speed  Direction of travel (steering angle)  Transverse acceleration  Longitudinal acceleration  Rate of turn Off-road PSM When the Low Range/Off-road programmer is switched on, an off-road PSM specially adapted for off-road terrain to improve traction is automatically activated. At speeds below 35 km/h, the off-road PSM reacts later in the case of under or oversteering and improves the steering control. Switching off PSM Press the PSM switch. The PSM switches off after a short delay. When the PSM is off, the PSM OFF warning light in the instrument panel and the indicator light in the switch are lit.  When braking, the vehicle is also stabilized when the PSM is switched off!  One-sided wheel spin is also prevented when the PSM is switched off!  On Tiptronic vehicles, the slip upshift function is switched off when PSM is switched off . Refer to Characteristic features of Tiptronic vehicles (slip upshift) . The PSM should always be switched on for normal driving. In the following exceptional cases, it can be advantageous to switch off the PSM temporarily: - On a loose surface and in deep snow NOTE:  The PSM (Porsche Stability Management) is automatically ready/switched on after each engine start. 2006 Porsche Cayenne 2003-2008 BRAKES Anti-Lock Brake System (ABS) 2006 Porsche Cayenne 2003-2008 BRAKES Anti-Lock Brake System (ABS)

- When rocking the vehicle free - When using snow chains - On extremely difficult terrain (if one or more wheels have little or no road grip - engine performance is reduced) Switching PSM back on Press the PSM switch. The PSM switches on after a short delay. Characteristic features of Tiptronic vehicles (slip upshift)  When a maximum permissible speed difference between front and rear axle is exceeded, the integrated slip monitoring shifts into the next highest gear. This increases the driving stability on slippery roads.  When PSM is switched off, the slip monitoring (slip upshift function) is also switched off. In this way, the Tiptronic enables an active sporty driving style even when the friction coefficient is low as is the case with manual transmission vehicles. 45 IN INFORMATION ON PSM - AS OF MY 2003 (CAYENNE MAN, CAYENNE S MAN) INFORMATION ON PSM PSM is an active control system to stabilize the vehicle at the limit of driving dynamics. Sensors continuously determine:  Vehicle speed  Direction of travel (steering angle)  Transverse acceleration  Longitudinal acceleration  Rate of turn Off-road PSM When the Low Range/Off-road programmer is switched on, an off-road PSM specially adapted for off-road terrain to improve traction is automatically activated. At speeds below 35 km/h, the off-road PSM reacts later in the case of under or oversteering and improves the steering control. Switching off PSM Press the PSM switch. The PSM switches off after a short delay. NOTE:  The PSM (Porsche Stability Management) is automatically ready/switched on after each engine start. 2006 Porsche Cayenne 2003-2008 BRAKES Anti-Lock Brake System (ABS)

When the PSM is off, the PSM OFF warning light in the instrument panel and the indicator light in the switch are lit.  When braking, the vehicle is also stabilized when the PSM is switched off!  One-sided wheel spin is also prevented when the PSM is switched off!  On Tiptronic vehicles, the slip upshift function is switched off when PSM is switched off . Refer to Characteristic features of Tiptronic vehicles (slip upshift) . The PSM should always be switched on for normal driving. In the following exceptional cases, it can be advantageous to switch off the PSM temporarily: - On a loose surface and in deep snow - When rocking the vehicle free - When using snow chains - On extremely difficult terrain (if one or more wheels have little or no road grip - engine performance is reduced) Switching PSM back on Press the PSM switch. The PSM switches on after a short delay. 45 IN INFORMATION ON PSM - AS OF MY 2003 (CAYENNE S TIO TITAN) INFORMATION ON PSM PSM is an active control system to stabilize the vehicle at the limit of driving dynamics. Sensors continuously determine:  Vehicle speed  Direction of travel (steering angle)  Transverse acceleration  Longitudinal acceleration  Rate of turn 45 11 19 REMOVING AND INSTALLING SPEED SENSOR - AS OF MY 2003 (ALL MODELS EXCEPT CAYENNE S TIO TITAN) NOTE:  The PSM (Porsche Stability Management) is automatically ready/switched on after each engine start. 2006 Porsche Cayenne 2003-2008 BRAKES Anti-Lock Brake System (ABS)

PRELIMINARY WORK Raise vehicle --> 40 V0 LIFTING THE VEHICLE - AS OF MY 2003 (CAYENNE TURBO S, CAYENNE S TIO TITAN) or 40 V0 LIFTING THE VEHICLE - AS OF MY 2003 (CAYENNE TIP, CAYENNE MAN, CAYENNE S TIP, CAYENNE S MAN, CAYENNE TURBO) . REMOVING SPEED SENSOR Installation Location: Fig. 1: Speed sensor Courtesy of PORSCHE OF NORTH AMERICA, INC. 2006 Porsche Cayenne 2003-2008 BRAKES Anti-Lock Brake System (ABS)

Fig. 2: Installation location speed sensor Courtesy of PORSCHE OF NORTH AMERICA, INC. 1. At the front, turn the steering so far that the speed sensor is made more easily accessible. The wheel in the rear does not need to be removed. 2006 Porsche Cayenne 2003-2008 BRAKES Anti-Lock Brake System (ABS)

Fig. 3: Speed sensor connector Courtesy of PORSCHE OF NORTH AMERICA, INC. 2. Disconnect speed sensor connector. 2006 Porsche Cayenne 2003-2008 BRAKES Anti-Lock Brake System (ABS)

Fig. 4: Speed sensor fastener Courtesy of PORSCHE OF NORTH AMERICA, INC. 3. Unscrew fastening screws and remove speed sensor. INSTALLING SPEED SENSOR  The bore for mounting the speed sensor must be free of dirt.  Observe correct tightening torques. NOTE:  The speed sensor must be inserted using Optitemp (Optitemp LG2, 25-ml spray can available under Part No. 000.043.204.21). 2006 Porsche Cayenne 2003-2008 BRAKES Anti-Lock Brake System (ABS)

1. Position speed sensor in the installation position and screw down. 2. Plug in connector. SUBSEQUENT WORK Lower vehicle --> 40 V0 LIFTING THE VEHICLE - AS OF MY 2003 (CAYENNE TURBO S, CAYENNE S TIO TITAN) or 40 V0 LIFTING THE VEHICLE - AS OF MY 2003 (CAYENNE TIP, CAYENNE MAN, CAYENNE S TIP, CAYENNE S MAN, CAYENNE TURBO) . 45 30 19 REMOVING AND INSTALLING HYDRAULIC UNIT - AS OF MY 2003 (ALL MODELS EXCEPT CAYENNE S TIO TITAN) TOOLS PRELIMINARY WORK 1. Remove plenum panel cover. Refer to 66 44 19 Removing and installing cowl panel cover - as of MY 2003 (All Models) . 2. Using the bonnet stay 97040 the bonnet can be opened wider for better accessibility of the plenum panel. To do this, remove the front gas spring and mount the bonnet stay. Refer to 55 31 19 Removing and installing pneumatic spring - as of MY 2003 (All Models) . Designation Type Number Explanation bonnet stay special tool 97040 2006 Porsche Cayenne 2003-2008 BRAKES Anti-Lock Brake System (ABS)

Fig. 5: Removing DME control module Courtesy of PORSCHE OF NORTH AMERICA, INC. 3. Remove the DME control module -arrows- . Refer to 24 70 19 Removing and installing DME control module - as of MY 2003 (Cayenne TIP, Cayenne MAN, Cayenne S TIP, Cayenne S MAN, Cayenne Turbo) . See Fig. 5 . REMOVING HYDRAULIC UNIT  Any damp connector must be wiped dry before being disconnected from the connector on the hydraulic unit. If necessary, provide the connector with a suitable protector.  Brake fluid on electrical contacts (even thinned brake fluid) leads to corrosion and may cause faults in the system.  The brake lines must not be bent in the area of the hydraulic unit.  Clean the interfacing points of the brake lines, but not with cleaning agents.  Rinse off any brake fluid emerging thoroughly with water. NOTE:  When fitting the hydraulic connections, the electric plug connections on the control units must remain connected as long as possible. This prevents the plug connections on the hydraulic unit or in the connectors inside from being splashed with brake fluid or water. 2006 Porsche Cayenne 2003-2008 BRAKES Anti-Lock Brake System (ABS)

The hydraulic unit is installed in the plenum panel on the front right, under the DME control unit. See Fig. 6 . Fig. 6: Hydraulic unit Courtesy of PORSCHE OF NORTH AMERICA, INC. Fig. 7: Location of hydraulic unit below DME control unit support and ground cable Courtesy of PORSCHE OF NORTH AMERICA, INC. 2006 Porsche Cayenne 2003-2008 BRAKES Anti-Lock Brake System (ABS)

2002-2008 Porsche Cayenne Petrol & Diesel Service & Repair Manual

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