45-40Fault code 5500 · Wheel speed monitoring

911 Turbo (996) PSM 05 45 45-40Fault code 5500 Wheel speed monitoring Diagnostic conditions • The fault is stored if the average speed of one wheel is at least 5 % greater than the speed of the other wheels for longer than 20 s. • Vehicle speed is greater than 6 km/h • ABS control not active Possible cause of fault ♦Toothed discs soiled/damaged ♦Incorrect tyre pressure, wheel size (collapsible wheel, spare wheel) Affected terminals – Diagnosis/troubleshooting Note! Check tyre pressure and wheel size. Erase fault memory and carry out a test drive. Work instruction Display OK If not OK 1 Mechanical function ♦Check speed sensor and OK Speed sensor or toothed disc at the front left for ⇒ Step 2 toothed disc faulty soiling and external damage → End 2 Mechanical function ♦Check speed sensor and OK Speed sensor or toothed disc at the front right ⇒ Step 3 toothed disc faulty for soiling and external damage → End 3 Mechanical function ♦ Check speed sensor and OK Speed sensor or toothed disc at the rear left for ⇒ Step 4 toothed disc faulty soiling and external damage → End 4 Mechanical function ♦ Check speed sensor and OK Speed sensor or toothed disc at the rear right for ⇒ Step 5 toothed disc faulty soiling and external damage → End 5 PSM control module faulty → End 4503 Fault code 5500 45-40 page 1 Printed in Germany – 4, 2001 5500ps05