Fault, DTC Possible causes, elimination, notes · Further to test 2

911 Carrera (996) Anti-lock brake system diagnosis Fault, DTC Possible causes, elimination, notes Further to test 2 Displayall four wheels in the Tester display. Drive straight ahead at a uniform speed of approx. 24 km/h and have a second person observe the Tester display. Requireddisplay: Deviationbetween the wheel speeds of the four wheels max. 1 km/h. Further details about tests 1 and 2 are given under "Actual values menu" on P. 45 -D38. Possible faults (cause in the event of deviation): 1. Air gap between speed sensor and gear wheel (pulse wheel)too large or, due to wear (chip formation), too small (check installation). 2. Pulsewheel defective or corroded. 3. Wheelbearing damage (wheel bearing not adjustable). 4. Plug connection in wiring from the speed sensor to the control module or PIN on the control module connector not OK. Test point 3 Front right Generalprocedure as for test point 2/diagnostic trouble code 4206 speed sensor, (check speed sensor signal with the Porsche System Tester 2). signal implausible -Speed sensor signal: Go to the Actual values menu. There, select Fault code 4201 the front right wheel speed. Test point 4 Rear right Generalprocedure as for test point 2/diagnostic trouble code 4206 speed signal, (check speed sensor signal with the Porsche System Tester 2). signal implausible -Speed sensor signal: Go to the Actual values menu. There, select Fault code 4211 the rear right wheel speed. Test point 5 Rear left Generalprocedure as for test point 2/diagnostic trouble code 4206 speed signal, (check speed sensor with the Porsche System Tester 2). signal implausible -Speed sensor signal: Go to the Actual values menu. There, select Fault code 4216 the rear left wheel speed. 45 02 DiagnosisjTroubleshooting 45 -D 25