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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 >> MOST switch

MOST switch

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The MOST switch is part of the PCM2. It keeps the electrical MOST closed if no other MOST control module is optically connected to the MOST. The MOST switch is opened when a light signal is received from the connected MOST control modules.

The following settings can be coded:

NOTE:
  • When the PCM2 is replaced, the coding must be performed in accordance with the vehicle equipment.
  • When the Switch closed parameter is set, the switch remains closed even in existing MOST control modules. Communication is then not possible.