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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) >> CD changer control module function >> Input signals

Input signals

The following queries can be run using this menu item:

NOTE: Deactivate the automatic traffic announcement before performing the diagnosis on the PCM2. If this is not done, the diagnosis will abort.
INPUT SIGNALS - 3DB LOWERING

Menu item Function
  • 3dB lowering
Under this menu item, it is possible to check the electrical and optical MOST during troubleshooting.
  • Connect and start the Porsche System Tester II 9588 and switch on the ignition.
  • Select 911 (996) in the Vehicle type menu and confirm with the "FORWORD" key.
  • Select PCM in the Control modules menu and confirm with the "FORWORD" key.
  • Select PCM2 GW in the 911 (996) PCM2 function selection and confirm with the "FORWORD" key.
  • Select Input signals in the PCM2 GW function selection and confirm with the "FORWORD" key.
  • Select 3dB lowering  in the PCM2 GW input signals function selection and confirm with the "FORWORD" key.
  • Read out values from the display field.