911 Carrera 4 Cabriolet (996) F6-3.4L (1999)
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MOST switch closed
NOTE:
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When the PCM2 is replaced, the coding must be performed in accordance with the connected MOST control modules.
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When the 'Switch closed' parameter is set, the switch remains closed even in existing MOST control modules. Communication is then not possible.
Navigation
Navigation
The navigation module is designed as a module box, which can be inserted in the PCM2 as an option. Once inserted, an electronic switch is opened
automatically and the module is integrated into the MOST ring.
PCM2 Control Module (Head Unit)
PCM2 Control Module (Head Unit)
The PCM2 control unit(head unit) includes the following components:
Internal:
PCM2 gateway
PCM2 Man Machine Interface (MMI)
Amplifier (internal)
Tuner
Single CD
Navigation (optional/insertion)
VOCS (voice control system)(optional/insertion)
Controller Area Network (CAN) Comfort
MOST switch
External:
External amplifier (optional, Harman or BOSE)
CD changer (CDC), (optional)
Telephone/telematics (optional)
The PCM2 consists of at least two but a maximum of four MOST nodes, (Gateway, MMI and optional Navigation and VOCS (optional), which
communicate electronically with each other via MOST. Data is transferred outside of the PCM2 via the optical MOST.
Ring Break Diagnosis Lead
Ring Break Diagnosis Lead
The ring break diagnosis lead is an electrical lead, which, as a stub cable, connects the individual MOST control modules in the system with one another.
The existing MOST control modules are checked at regular intervals during communication with the control modules via the electrical/optical MOST.
Single CD
Single CD
The CD player is part of the PCM2. It is used to play the audio and navigation CDs as well as to update the navigation system.
Telephone/Telematics
Telephone/Telematics
The telephone/telematics feature is available as an option and is linked to the PCM2 via the optical waveguide.
Terminating Resistors on the CAN
Terminating Resistors On The CAN
Terminating resistors are fitted to each end of the wiring to prevent reflection on the wiring. These terminating resistors are integrated into each control
module. The interconnection prevents the resistors from being measured with the ohmmeter from the outside.
Tuner
Tuner