Boxster S (986) F6-3.2L (2001)
Radio/Stereo: Description and Operation
PCM2/CDR23
(CDR23)
140 CDR23 - Introduction
The manual contains the diagnosis for the following system:
CDR23
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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After the battery has been connected, the instructions in the assembly must be observed.
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Deactivate the "automatic traffic announcement" before beginning the diagnosis on CDR23. If this is not done, the system will crash (applies only
to software version < 03).
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When working on the optical waveguide, please observe the instructions in assembly Optical waveguide - MOST bus.
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After troubleshooting or repairs, erase the fault memory with the 9588 Porsche System Tester II and carry out a test drive.
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After the test drive, read out the fault memory with the 9588 Porsche System Tester II again.
DANGER:
Danger of injury through triggering of driver's airbag.
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9588 Never hang the Porsche System Tester II over the steering wheel.
CAUTION:
Danger of damage due to improper handling of the battery and the control unit connectors.
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Never disconnect battery with engine running.
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Never start engine unless battery is connected securely.
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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.:
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battery disconnected
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plug connections disconnected
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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.
Fault type - Frequency counter/Temperature/Voltage; Speed/Time of occurrence
Supply voltage fault type
The display shows which fault type has occurred:
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Undervoltage '< 9 V'
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Overvoltage '> 16 V'
Open circuit in distribution line
The value indicates the status of the MOST ring when the fault occurred.
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Optically faulty
-
Electrically faulty
Frequency counter
When a fault first occurs, a fault entry is made in the fault memory and the counter is simultaneously set to 50.
If a fault is present, the counter is incremented by 1 for each "ignition on". The maximum count is 255.
The counter is decremented if the fault is no longer present. The fault memory is automatically erased when the
counter reaches 0.
If the error occurs again when the counter is between 1 and 49, the counter is reset to 50.
Temperature
The value indicates the temperature (temperature sensor in the gateway) at the time the fault occurred. The temperature
of the fibre optic transmitter is monitored: max 85 °C.