80-13Fault code 27 · Central flap motor - No reaction to activation, signal

911 Turbo (996) Air conditioning H01, H02 80 80-13Fault code 27 Central flap 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 central flap ♦Servo motor for central flap faulty or flap does not open/close smoothly. Affected terminals Plug B, terminals 9, 14 and 20 Plug D, terminals 4 and 12 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 ♦Remove the connector for the and that it is cor- → End central flap rectly inserted ⇒ Step 2 2 Check 5 V - supply line to ♦Switch on ignition approx. 5 V ⇒ Step 6 central flap motor ⇒ Step 3 ♦Measure voltage at plug of the central flap between pin 3 and ground ♦Measure voltage at plug of the central flap between pin 3 and pin 1 8001 Fault code 27 80-13 page 1 Printed in Germany – 15, 2001 27xxxh02