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Home >> Porsche >> 2011 >> 911 Speedster >> Repair and Diagnosis >> Suspension >> Front Suspension >> 4X - Chassis - General -- CARRERA (997) >> WM 4X00IN Tests/Notes For Four-Wheel Drive (CARR. 4 Coupe, Turbo Coupe, CARR. 4S Coupe, TARGA 4, TARGA 4S, CARR. 4 CABRIO, CARR. 4S CABRIO, Turbo CABRIO) >> Information for four-wheel drive vehicles >> Brake test

Brake test

Brake tests can only be carried out on roller-type test stands or plate test stands.

The ignition must be switched off on the 911 Turbo! This is necessary because of the controlled four-wheel drive function - Porsche Traction Management (PTM).

If no four-wheel drive test stand (roller-type test stand) is available, the following limit values must not be exceeded for conventional roller-type test stands:

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