80-9Fault code 23 · Footwell blower outlet sensor - Interruption/ ground

911 Turbo (996) Air conditioning H01, H02 80 80-9Fault code 23 Footwell blower outlet sensor - Interruption/ ground short Diagnostic conditions • Ignition on Note! ♦No control module fault stored ♦No fault with supply voltage (5 V) Possible cause of fault ♦Short circuit to voltage/ground or open circuit in the wiring between the air-conditioning system regulator and the tempera- ture sensor ♦Temperature sensor faulty Affected terminals Plug B, terminals 7 and 9 Diagnosis/troubleshooting Work instruction Display OK If not OK 1 Check temperature sen- ♦Switch off ignition approx. 2.8 kΩ ⇒ Step 5 sor (at 23 °C) ♦Remove plug B from the air-con- ⇒ Step 2 ditioning system regulator ♦Measure resistance at plug B between pin 7 and pin 9 2 Check wiring between air- ♦Remove connector from tem- 0 V Repair wiring har- conditioning system regu- perature sensor ⇒ Step 3 ness lator and temperature → End ♦Switch on ignition sensor for short to B+ ♦Measure voltage at plug B of the air-conditioning system regula- tor between pin 7 and ground ♦Measure voltage at plug B of the air-conditioning system regula- tor between pin 9 and ground 3 Check wiring between air- ♦Measure resistance at plug B of ∞ Ω Repair wiring har- conditioning system regu- the air-conditioning system reg- ⇒ Step 4 ness lator and temperature ulator between pin 7 and ground → End sensor for short to ground 8001 Fault code 23 80-9 page 1 Printed in Germany – 15, 2001 23xxxh02