911 Turbo AWD (996) F6-3.6L Turbo (2001)
General Module: Component Tests and General Diagnostics
PCM2 Gateway - Introduction
Introduction
The database contains the diagnosis for the following system:
PCM2 Gateway
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.
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After troubleshooting or repairs, erase the fault memory with the Porsche System Tester II No. 9588 and carry out a test drive.
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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
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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.
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Never disconnect battery with engine running.
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Never start engine without securely connected battery.
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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 has occurred:
- Undervoltage '< 9 V'
- Overvoltage '> 16 V'
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 optical transmitter is monitored; max 85 degree C.
Voltage
The value indicates the voltage at the time the fault occurred.
Vehicle speed
The value indicates the vehicles speed at the time the fault occurred.