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Home >> Porsche >> 2003 >> 911 Carrera 4S, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 39 (Radio, Navigation, Telephone, Pcm & Park Assistant - Diagnosis) >> Control unit function - external Harman amplifier >> External Harman amplifier input signals

External Harman amplifier input signals

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2004 Porsche Boxster, 2003 Porsche Boxster, 2002 Porsche Boxster, 2001 Porsche Boxster, and 2000 Porsche Boxster. However, it is still accessible from the selected car via links, so may be relevant.

The following functions can be tested 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 MENU ITEM - FUNCTION (MMI)

Menu item Function
"BULL" 3 dB loss Under this menu item, the MOST ring can be checked during troubleshooting.
  • Connect and start the Porsche System Tester II 9588 and switch on the ignition
  • Select vehicle type Boxster (986) and the PCM2 GW control unit and press the ">>" key
  • Select the Input signals menu item and press the ">>" key.
  • Select the 3 dB loss menu item using the > key and press the ">>" key.
  • Read out values from the display field