Porsche 911 GT3 Owner's Manual page 62

Switching off Stability Control (SC) and
Traction Control (TC)
f Press SC+TC OFF button.
Stability Control and Traction Control switch off
completely after a short delay.
The light-emitting diode in the button is lit up.
When the system is switched off, the multifunc-
tional PSM light on the instrument panel is lit
and the message "SC+TC OFF" appears conti-
nuously on the on-board computer.
A gong signal also sounds.
f Push the on-board computer lever forward to
acknowledge the additional message under
the digital speedometer.
– All PSM functions are deactivated.
– The ABS remains active.
Note
If the PSM is deactivated directly using the
SC+TC OFF button, the light-emitting diode of the
SC OFF button also lights up.
Switching Stability Control (SC) and
Traction Control (TC) back on
f Press SC+TC OFF button.
PSM is switched on after a short delay.
The light-emitting diode in the button and the
multi-functional PSM light on the instrument
panel go out.
The on-board computer shows a message.
Multifunctional PSM light
– The multifunctional light on the instrument
panel lights up for a lamp check when the
ignition is switched on.
– The light flashes to indicate PSM control
operations.
– In conjunction with a message on the on-board
computer, the light indicates that PSM is fully
or partially deactivated.
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.
f Have the fault repaired at your authorized
Porsche dealer immediately.
f Please see the chapter "PUTTING VEHICLE
INTO OPERATION" on Page 218.
Towing
f Please see the chapter "TOWING" on
Page 235.
Checks on test stands
Brake tests must be performed only on plate-
type test stands or roller test stands.
The ignition must be 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 on the brake test stand must
only be carried out with the ignition switched
off.
Power measurement
Power measurements on roller test stands are not
approved by Porsche.
Operation, Safety
61