996 Carrera Group 0 Part 2 Diagnosis / PAGE 150
Fault, Fault code Possible causes, elimination, notes · Short to ground
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911 Carrera (996) Heating diagnosis
Fault, Fault code Possible causes, elimination, notes
Short to ground
1. UnplugconnectorA from the heatingjair-conditioningcontrol.
2. Connect ohmmeter to connector A 7 and ground.
Display: 00.0.
If 0 -5 .Q is displayed,check wiring harnessfor pinching
and chafing damage.
Test point 4
Footwell blower outlet sensor Diagnosis conditions
No control module fault stored.
Open circuit No fault with supplyvoltage (5 volts).
Short to ground Outsidetemperature higher than -30 °C.
Fault code 23
Open circuit
1. UnplugconnectorsA andB from the heating/air-conditioningcontrol,
2. Connectohmmeter to connectors A 12 and B 5.
Display: approx. 2.8 k.o. at 23 °C
3. Unplugconnector from blower outlet sensor.
4. Connectohmmeter to connector A 12 and blower outlet
sensorconnectorpin2.
Display: < 5 .Q
5. Connectohmmeter to connector B 5 and blower outlet
sensor connector pin 1.
Display: < 5 Q
6. Connectvoltmeter to connector B 5 and ground,
Switch on ignition.
Display: 0 volts
If approx. 5 volts are displayed,check wiring harness
for pinching and chafing damage.
80 01 Diagnosis/troubleshooting, heating 80 -D 19
Printed in Germany -II, 1998 99680Dl
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