Heating diagnosis 911 Carrera (996) · Fault, Fault code Possible causes, elimination, notes

Heating diagnosis 911 Carrera (996) Fault, Fault code Possible causes, elimination, notes Test point 3 Interior temperature sensor Diagnosis conditions No control module fault stored. Open circuit No fault with supplyvoltage (5 volts), Short to ground Outsidetemperature higher than -40 °C. Fault code 22 Open circuit 1. Unplug connector A from the heatingjair-conditioningcontrol. 2. Connectohmmeter to connectors A 10 and A 12. Display: approx. 3 k.o. at 23 DC Note The wires to the interior temperature sensor are routed via two additional plug connectionson the heating/air-conditioningcontrol. 3. Unplug connector from the interior temperature sensor. 4. Connectohmmeterto connectorA 10 and interiorsensor connectorpin 5. Display: < 5 .Q 5. Connectohmmeter to connector A 12 and interior sensor connector pin 4. Display: < 5 .0. 6. Connectvoltmeter to connector A 10 and ground, Switch on ignition. Display: 0 volts If approx. 5 volts are displayed,check wiring harness for pinching and chafingdamage. 80 -D 18 80 01 Diagnosis/troubleshooting, heating 99680Dl Printed in Germany -11, 1998