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Fault code 20: 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 20)

Work instruction Display OK If not OK
1 Check wiring from signal converter to control module for short circuit to ground.
  • Switch off the ignition.
  • Pull plug A off the control module.
  • Pull plug off the signal converter.
  • Switch on ignition.
  • Measure resistance between plug A on control module pin 4 and ground.
  • Measure resistance between plug A on control module pin 3 and ground.
 Step 2 Repair wiring harness.
-> End
2 Check wiring from signal converter to the control module for open circuit.
  • Switch off the ignition.
  • Measure resistance between plug A on control module pin 4 and plug on signal converter pin 6.
  • Measure resistance between plug A on control module pin 3 and plug on signal converter pin 8.
 < 5
Step 3		 Repair wiring harness.
-> End
3
  • Replace signal converter.
 -> End
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