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Home >> Porsche >> 2003 >> 911 Carrera 4S, Standard >> Repair and Diagnosis >> Brakes >> Anti-Lock Brakes >> Anti-Lock Brake System (Abs) - 5.3 & Abs/TC 5.3, Diagnosis - 911 CARRERA (996) >> ABS 5.3 and ABS/TC 5.3 systems >> Fault overview / troubleshooting (diagnosis / test plan) >> Test point 14 >> Possible causes, elimination, notes

Possible causes, elimination, notes

The ABS gear wheels possess 48 teeth. Not all 48 teeth are detected during a revolution of the wheel. 

Check ABS gear wheels (clamping pins on the front axle / pulse strip on the rear axle) for dirt or damage. Replace damaged parts.

Check wheels and tyres (extreme tyre differences or impermissible wheel/tyre combination).

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