Fault, Fault code Possible causes, elimination, notes · 7. Check wire from connector B 17 to drive motor pin 3 for sh

911 Carrera (996) Heating diagnosis Fault, Fault code Possible causes, elimination, notes 7. Check wire from connector B 17 to drive motor pin 3 for short to B+ and short to ground. 8. Check wire from connector C 8 to drive motor pin 4 for short to B+ and short to ground. 9. Check wire from connector A 12 to drive motor pin 5 for short to B+ and short to ground. Test point 11 A/C Note This fault can be determined only during the system test. Signalimplausible Fault code 30 Signal implausible 1. Check refrigerant pressure (see Page 87 -13). 2. Checkhigh/lowpressureswitch. Battery positive voltage must be present at terminal 1 on the high/low pressure switch (with ignition on) if there is sufficient refrigerant in the system. 3. Check the heating activationrelay. Battery positive voltage must be present at terminal 87 when the ignition is switched on. 4. Check the air-conditioningcompressor relay. Battery positive voltage must be present at terminal 30 {with the ignition on} and the high/low pressure switch actuated. Terminal31 must be connectedto ground. Battery positive voltage must be present at terminal 86 when the engine is started. Terminal85 must be connected to ground when the DME switches on the air-conditioningcompressor {7-seconddelay}. 5. Unplug connector D from the heatingjair-conditioningcontrol, 8001 Diagnosis/troubleshooting, heating 80 -D 27 Printed in Germany -11, 1998 99680Dl