91-7Fault code 1 · Outer right sensor faulty

911 Turbo (996) ParkAssist P02 91 91-7Fault code 1 Outer right sensor faulty Diagnostic conditions • Ignition on • Reverse gear engaged • Continuous fault tone emitted after engaging reverse gear Possible cause of fault ♦Short circuit to voltage/ground or open circuit in supply leads between the control module and the outside sensor on the right ♦Outside sensor on right is faulty ♦Control module is faulty Affected terminals Terminals I/4, 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 right for external damage. sensor on the right 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 right. ♦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 9101 Fault code 1 91-7 page 1 Printed in Germany – 42, 2003 1xxxxp02