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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 2 >> Procedure:

Test point 2: Procedure:

Check  the speed sensor signal with the System Tester 2 via the "Actual values" menu. To do this, call up the front left wheel speed. Two tests are possible here. 

Test 1  with raised vehicle.

(Swap of speed sensors and test of the speed sensor signal quality.)

Test 2  with vehicle driving straight at approx. 2 - 4 km/h.

(Comparison of wheel speed signal qualities with each other.)

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

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