Tandem Pump; Reservoir - Porsche Cayenne V6 2008 Service Information

Tandem Pump

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. The system is filled with Pentosin CHE 202.

Reservoir

The reservoir (-A-) is located in the left of the engine compartment, next
to the power steering reservoir (-B-). A filter, which filters the oil flowing
back in, is integrated in the reservoir. An oil dipstick for checking the oil
level is fitted on the lid.
Control Unit
The control unit is installed under the rear seat at the right. The input
data is evaluated continuously and appropriate control operations are
initiated in the valve blocks over the vehicleís entire speed range.
Analogue input signals:
• Level sensor, front left/right.
• Level sensor, rear left/right.
• Level sensor, rear right.
• Body acceleration sensor, front left/right.
• Body acceleration sensor, rear right.
• Rear-axle valve block: Pressure sensor 1, pressure sensor 2.
• Front-axle valve block: Pressure sensor 1, pressure sensor 2.
• PDCC button.
Input signals via drive CAN:
• Vehicle speed.
• Lateral acceleration.
• Yawing speed
• Steering angle.
• Engine speed.
• Nominal engine idle speed.
• Outside temperature.
Output signals:
• Instrument cluster: Text, symbols.
• Rear-axle valve block: Direction valve, pressure regulating valve.
• Front-axle valve block: Direction valve, pressure regulating valve, fail-
safe valve.
A - PDCC reservoir
B - Power steering reservoir
Technical Manual
Technical Manual Increased risk of
accidents and material damage if too much
Pentosin CHF 202 is filled in or if Pentosin
CHF 202 comes into contact with the
coolant hoses when filling or topping off.
Chassis
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