911 GT2 (996) F6-3.6L Turbo (2003)
The PCM2 control unit (head unit) includes the following components:
Internal:
PCM2 Gateway
PCM2 Man Machine Interface (MMI)
Internal amplifier (optional, depending on the equipment)
Tuner
Single CD
Navigation (optional/rack)
VOCS (voice control system) (optional/insertion)
Wake-up and diagnosis distribution breakage line control
Controller Area Network (CAN) Comfort
MOST switch
External:
External amplifier (optional, Harman or BOSE)
Telephone/telematics (optional)
CD changer (CDC), (optional)
The PCM2 consists of at least two but a maximum of four MOST nodes, (Gateway, MMI and Navigation and VOCS (optional)), which communicate
with each other via the electronic MOST. Data outside the PCM2 is transferred via the optical MOST.
Telephone/Telematics
The telephone/telematics is available as an optional feature and is linked to the PCM2 via the optical waveguide.
Tuner
The tuner is part of the PCM2 (on the mainboard).
Unlock Counter
Interruptions occur in the system if perfect communication is no longer possible. If the relevant threshold values are exceeded, an entry is recorded in the
appropriate control module and the 'unlock counter' is incremented.
External Amplifier
The external amplifier (Harman or BOSE) is available as an optional feature and is linked to the PCM2 via the optical waveguide.
Internal Amplifier
The internal amplifier is part of the PCM2 (on the mainboard).
Wake-Up Function
In an idle state, all control modules that are connected to the MOST are in sleep mode. When the PCM2 is switched on, a 'wake-up signal' is sent via the
gateway. This signal is answered by the MOST control modules that are connected via the optical MOST.
External BOSE Amplifier - Introduction
Introduction
The manual contains the diagnosis for the following system:
BOSE external amplifier
General Instructions/Safety Instructions
The following points must be observed during vehicle diagnosis:
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After the battery is connected, volatile memories must be reprogrammed. In the case of radio coding and tuning, the customer must be informed of
decoding and the deleted tuner memory.
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Deactivate the 'automatic traffic announcement' before beginning the diagnosis on the PCM2. If this is not done, the system will crash.
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When working on the optical waveguide, please observe the Optical waveguide - MOST bus assembly.