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Manual: 2011/2012 911

Page: 57

Switching off PSM

  • Press PSM OFF button.
    PSM is switched off after a short delay.
    The light-emitting diode in the button is lit up.
    When the PSM is switched off, the PSM multifunctional light on the instrument panel is lit and a message is shown on the on-board computer.
    An acoustic signal also sounds.

Information
When PSM is switched off, the additional braking functions are deactivated. Automatic reactivation in emergency situations is linked to the PSM control.



The following functions stabilize the vehicle in emergency situations, even with PSM switched off:
– When PSM is off, the vehicle is stabilized as soon as one of the two front wheels enters the ABS control range.
– When PSM is off and Sport mode is on, the vehicle is stabilized as soon as both front wheels enter the ABS control range.

One-sided spinning of the wheels is prevented, even with PSM switched off.

Switching PSM back on

  • Press PSM OFF button.
    PSM is switched on after a short delay.
    The light-emitting diode in the button and the PSM multifunctional light on the instrument panel go out.
    The on-board computer shows a message.

Sport mode
A sportier car set-up is obtained when Sport or Sport Plus mode is switched on.

PSM interventions are later than in Normal mode; the vehicle can be maneuverd with greater agility at its performance limits, without dispensing with the assistance of PSM in emergency situations.

This helps to achieve optimal lap times, particularly on race circuits and a dry road surface.

PSM multifunctional light

– The multifunctional light on the instrument panel lights up for a lamp check when the ignition is switched on.
– The light indicates a control operation by flashing, including when PSM is switched off (brake control in the event of
one-sided wheel spin).
– In conjunction with a message on the on-board computer, the light indicates that PSM is switched off.
An acoustic signal also sounds.
– The light indicates a fault in conjunction with a message on the on-board computer.
PSM is out of order.

  • Please have the fault remedied at an authorized Porsche dealer.
  • Please see the chapter "PUTTING VEHICLE INTO OPERATION" on page 227.

Towing

  • Please see the chapter "TOWING" on page 242.

Checks on test stands
Brake tests
Brake tests must be performed only on plate-type test stands or roller test stands.

The ignition must be switched off.

The following limit values must not be exceeded on roller test stands:
– Testing speed 5 mph (8 km/h)
– Test duration 20 seconds

Handbrake tests
Handbrake tests on the roller test stand must be performed only with the ignition switched off.

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