80-15Fault code 29 · Outside air/recirculation air motor - No reaction to

911 Turbo (996) Air conditioning H01, H02 80 80-15Fault code 29 Outside air/recirculation air motor - No reaction to activation, signal unclear 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 outside air/recirculation air ♦Servo motor for outside air/recirculation air faulty or flap does not open/close smoothly. Affected terminals Plug B, terminals 9, 17 and 20 Plug D, terminals 5 and 13 Diagnosis/troubleshooting Work instruction Display OK If not OK 1 Visual inspection ♦Switch off ignition Check the connec- Clean connector or tor for corrosion plug in correctly ♦Unplug connector for outside and that it is cor- → End air / recirculation from servo rectly inserted motor. ⇒ Step 2 2 Check 5 V - supply line to ♦Switch on ignition approx. 5 V ⇒ Step 6 outside air/recirculation ⇒ Step 3 ♦Measure voltage at plug of out- air side air/recirculation air between pin 3 and ground ♦Measure voltage at plug of the outside air/recirculation air between pin 3 and pin 1 8001 Fault code 29 80-15 page 1 Printed in Germany – 15, 2001 29xxxh02