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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 >> Actual values (ABS and ABS/TC) >> Example (all wheels) >> Procedure:

Example (all wheels): Procedure:

Two tests  are possible to determine the speed-sensor signal.

Test 1  with the vehicle raised. (Swapping the speed sensors and checking the quality of the speed sensor signal.)

Test 2  when driving straight ahead at approx. 2 - 4 km/h.

(Signal qualities of the individual wheels are compared with each other.)

Test 2 is a better measure of the signal quality than is test 1.

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