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Home >> Porsche >> 2003 >> 911 Carrera 4S, Standard >> Repair and Diagnosis >> Accessories & Equipment >> Entertainment Systems >> Radio, Navigation & Pcm Diagnosis - 911 CARRERA (996) >> 8007 CDR23 >> Open circuit in diagnosis ring line >> Possible cause of fault

Possible cause of fault

Diagnosis ring line: short circuit to ground/ B+ or open circuit

The recipient MOST control module is faulty

CDR23 faulty

NOTE:
  • The diagnosis ring line is connected to the following MOST control modules:
  • CDR23 as of model year 2003
  • The MOST optical waveguide is connected to the following control modules:
  • Amplifier
  • CD changer