91-10Fault code 4 · Outer left sensor faulty

911 Turbo (996) ParkAssist P02 91 91-10Fault code 4 Outer left sensor faulty Diagnostic conditions • Ignition on • Reverse gear engaged Possible cause of fault ♦Short circuit to voltage/ground or open circuit in the supply leads between the control module and the outside sensor on the left ♦Outside sensor on left is faulty ♦Control module is faulty Affected terminals Terminals I/1, I/5 and I/7 Diagnosis/troubleshooting Work instruction Display OK If not OK 1 Visual inspection ♦Check the outside sensor on Step 2 Replace outside the left for external damage. sensor on the left or repair sensor ♦Check the sensor plug for dam- plug. age and corrosion. → End 2 Check supply voltage of ♦Switch off ignition. Approx. 8 V Step 4 the sensor Step 3 ♦Pull plug off the outside sensor on the left. ♦Switch on ignition. ♦Engage reverse gear. ♦Measure voltage between pin 3 of the sensor plug and ground. 3 Check ground lead of the ♦Measure voltage between pins Approx. 8 V Step 7 sensor 3 and 2 of the sensor plug. Step 8 4 Check sensor supply ♦Switch off ignition. ∞ Ω Repair wiring har- lead for short circuit to Step 5 ness. ♦Pull off all sensor plugs. ground → End ♦Pull plug off the control module for ParkAssist. ♦Measure resistance between plug I pin 5 on the control mod- ule for ParkAssist and ground. 9101 Fault code 4 91-10 page 1 Printed in Germany – 42, 2003 4xxxxp02