45-8Fault code 4201 · Speed sensor, front right

45 911 Turbo (996) PSM 5.7 45-8Fault code 4201 Speed sensor, front right Implausible signal from speed sensor Diagnostic conditions • Vehicle speed > 40 km/h (25 mph) for min. 40 s. Possible cause of fault ♦Toothed ring/speed sensor soiled or damaged, wheel-bearing play too great ♦Pick-up due to faulty shield ♦Speed sensor faulty ♦Control unit faulty Affected pins Pin 15 and pin 16 Diagnosis/troubleshooting Work instruction Display OK If not OK 1 Visual inspection ♦Examine speed sensor and Step 2 ♦Repair speed wire at the front right for exter- sensor and nal damage. lead. ♦Check speed sensor plug for ♦Repair speed corrosion. sensor plug. → End 2 Checking speed sensors ♦Ignition off. 1 kΩ to 3 kΩ > 3 kΩ or < 1 kΩ ♦Disconnect plug from speed Step 3 Step 9 sensor. ♦Measure resistance between pin 1 and pin 2 on speed sen- sor. 3 Checking function of ♦Ignition off. Measureable AC volt- No AC voltage speed sensor ♦Set AC measuring range on the age, approx. same measureable. level as to speed Step 5 multimeter. sensor of an oppo- ♦Jack the vehicle up and turn the site wheel at same front right wheel by hand. wheel speed. ♦Measure voltage between pin 4 Step 5 and pin 5 of speed sensor. 4503 Fault code 4201 45-8 page 1 Printed in Germany – 29, 2002 4201ps05