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Fault code 49: Diagnosis/troubleshooting

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2005 Porsche 911, 2004 Porsche 911, 2003 Porsche 911, 2002 Porsche 911, and 2001 Porsche 911. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSIS/TROUBLESHOOTING (FAULT CODE 49)

Work instruction Display OK If not OK
1 Check wire from data link connector to alarm system control module for short circuit to ground.
  • Pull plug A off the alarm system control module.
  • Measure resistance between plug A on alarm system control module pin 2 and ground.
 Step 2 Repair wiring harness.
->End
2 Check wire from data link connector to alarm system control module for short circuit to B+.
  • Switch on ignition.
  • Measure voltage between plug A on control module pin 2 and ground.
 0 V
Step 3		 Repair wiring harness.
->End
3 Check wire from data link connector to alarm system control module for open circuit.
  • Switch off the ignition.
  • Measure resistance between plug A on control module pin 2 and pin 7 on the data link connector.
 < 5
Step 4		 Repair wiring harness.
->End
4
  • Replace control unit.
 ->End
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