Actual values (ABS and ABS/TC) · The following actual values can be checked with Procedure:

911 Carrera (996) Anti-lock brake system diagnosis Actual values (ABS and ABS/TC) The following actual values can be checked with Procedure: this menu (with this function): Two tests are possible to determine the speed-sensorsignal. 1. Speed (wheel speed / test possible up to 18 km/h) Test 1 with the vehicle raised. (Swappingthe speed sensors and checking the quality of the Speed, front left speed sensor signal.) Speed, front right Test 2 when driving straight ahead at approx. 2 -4 km/h. Speed, rear left (Signal qualities of the individualwheels are compared with each other.) Speed, rear right Test 2 is a better measure of the signal quality 2. Engine rpm (not present with Solo ABS) than is test 1. Further to test 1 Further to speed: 1. In order to perform the test, manuallyturn the Select, activate and call up the desired wheel left front wheel at a uniform speed of approx. using the arrow keys. The wheel speed is 2 -3 km/h (observe display in the Tester scre- displayed according to the wheel rpm. en). All four wheels are displayed if all speeds 2. Slowlyincrease the speed and simultaneously are activated and called up. observe the speed increase (display), Example (front left wheel) Nominal values/required display Speed, front left 15.00 km/h Speed steps of approx. 0.06 km/h. First display at 1.81 km/h. This means: From the value measuredlast, the next value must be 0.06 km/h higher or, if the wheel is rotatingExample (all wheels) slower, must be 0.06 km/h lower. The Tester Speed, front left 15.00 km/h rounds the value down to 0.05 km/h or up to 0.07 km/h in some cases. Speed, front right 15.00 km/h Example Speed, rear left 15.00 km/h First measuredvalue = 1.81 km/h Second nominalvalue = 1.87 km/hSpeed,rear right 15.00 km/h Third nominalvalue = 1.93 km/h etc. 45 -D 39