Cayenne S (9PA) V8-4.5L (2003)
Body Control Module: Testing and Inspection
Description on on-Board Diagnostics
General Information On The Fault Memory
The fault memory of the control module can save up to (X) different faults simultaneously. If all (X) fault memories are occupied, the new fault
overwrites the oldest fault. The fault memory content of the vehicle electrical system control module is maintained even in removed state.
Communication Between Vehicle Electrical System Control Module and Porsche System Tester II
9588
Communication Between Vehicle Electrical System Control Module And Porsche System Tester II 9588
NOTE:
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The following conditions must be met in order to establish communication between the vehicle electrical system control module and the Porsche
System Tester II 9588:
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Porsche System Tester II 9588 connected to data link connector
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The battery voltage must be greater than 6.7 V
Fault Code Setting Conditions
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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faulty coding
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power failure
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etc.
In these circumstances, no fault is present in the system and the fault memory must be erased.
Troubleshooting Procedure
Troubleshooting Procedure
Troubleshooting can only be performed when the fault is present. In other words, specific troubleshooting can only be performed in accordance with
instructions (given under Diagnosis/troubleshooting for each fault code) if the entry has the status present in the fault memory.
If the fault is currently not present, please check the following:
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Diagnostic conditions are met
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All plug connections and ground points of the affected current path are OK.
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View the fault frequency counter in the Porsche System Tester II 9588 using the fault memory Info key F8 under Extended fault memory and try
to reach conclusions about eliminating any loose contacts in the system.
Diagnostic Conditions
Diagnostic Conditions
NOTE:
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Important. Always connect a suitable battery charging device to the vehicle electrical system battery before starting diagnosis. All unnecessary
loads must also be switched off.
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The fault can only be identified if the requirements listed under Diagnostic conditions are met. For this reason, the specified procedure must be
observed after a fault is repaired:
1. Erase fault memory.
2. Satisfy the requirements listed under Diagnostic conditions.
3. Read out fault memory again
Possible Causes of Fault
Possible Causes Of Fault
NOTE: The possible causes of fault that are responsible for the fault are listed here. Please note that in certain circumstances further faults can be stored
in the fault memory after troubleshooting (e.g. if plugs are disconnected). After carrying out repairs, read out the fault memory of all control modules and
erase any faults.
Communication Between Vehicle Electrical System Control Module and Porsche System Tester II No.