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Fault code 8: 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 8)

Work instruction Display OK If not OK
1 Check central locking switch.
  • Switch off the ignition.
  • Pull plug A off the control module.
  • Pull plug off central locking switch.
  • Switch on ignition.
  • Measure voltage between plug A on alarm system control module pin 29 and ground.
 0 V
Step 2		 Repair wiring harness.
-> End
2 Check central locking switch.
  • Measure resistance between pins 1 and 2 of plug for central locking switch.
 Approx. 180 at 20 °C.
Step 3		 Replace resistor or repair wiring harness.
-> End
3 Check operating points of central locking switch.
  • Measure resistance between pins 2 and 4 on central locking switch.
 Central locking switch not actuated to Open.
Central locking switch actuated to Open.
< 5
Step 4		 Step 5
-> End
4 Check operating points of central locking switch.
  • Measure resistance between pins 1 and 4 on central locking switch.
 Central locking switch not actuated to Closed.
Central locking switch actuated to Closed.
< 5
Step 6		 Step 5
-> End
5
  • Replace central locking switch.
 -> End
6
  • Replace control module.
 -> End
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