911 GT2 (996) F6-3.6L Turbo (2003)
The external amplifier (Harman or BOSE) is available as an optional feature and is linked to the CDR23 via the optical waveguide.
Internal Amplifier
The optional internal amplifier (according to equipment) is a component of the PCM2 (installed on the mainboard).
Wake-Up Function
In an idle state, all control modules that are connected to the CDR23 are in sleep mode. When the CDR23 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.
CD Changer - Introduction
Introduction
The database contains the diagnosis for the following system:
PCM2
General Instructions/Safety Instructions
The following points must be observed during vehicle diagnosis:
-
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.
-
Deactivate the 'automatic traffic announcement' before beginning the diagnosis on the PCM2. If this is not done, the system will crash.
-
When working on the optical waveguide, please observe the Optical waveguide - MOST bus assembly.
-
After troubleshooting or repairs, erase the fault memory with the Porsche System Tester II No. 9588 and carry out a test drive.
-
After the test drive, read out the fault memory with the Porsche System Tester II No. 9588 again.
DANGER:
Danger of injury through triggering of driver's airbag
-
Never hang the Porsche System Tester II No. 9588 over the steering wheel.
CAUTION:
Danger of damage due to improper handling of the battery and the control unit connectors:
-
Never disconnect battery with engine running.
-
Never start engine without securely connected battery.
-
Never pull off or push on plug connections for the control modules or other electronic components when the ignition is switched on.
General Information On The Fault Memory
Fault code setting conditions
Fault codes can be set in several circumstances, e.g.:
-
battery disconnected
-
plug connections disconnected
-
power failure
In these circumstances, no fault is present in the system and the fault memory must be erased.
Fault memory info key F8
In order to be able to assess the fault exactly, the fault memory Info key F8 must be pressed. This information should be saved using the Save key F4 and
printed out. If a fault code is stored with "not present" status and no other problems are present, then the fault memory must be erased.
Open circuit - Short to ground/Voltage short/Version; Vehicle parameters/Counter
Frequency counter
?
CD number
?
Vehicle hand-over
The PCM2 is converted into delivery mode (low-current mode) in production. As known from other systems (alarm system, instrument cluster, roll-over