Non-Trouble Code Procedures

Troubleshooting With No Control Unit Connected
The following text is displayed in the Porsche System Tester II 9588 :
Communication problem with the control unit.
- Restore connection by pressing >>
- Abort with ESC

NOTE: The driver's memory seat adjustment control unit is not connected directly to the diagnostic socket (16-pin, driver's footwell). Communication between the driver's memory seat adjustment control unit and the Porsche System Tester II 9588 only takes place indirectly via CAN comfort Gateway K' lead.

Diagnostic conditions
- Ignition on
- Fuses for driver's memory seat adjustment control unit are OK.
- Fuses for gateway in instrument cluster are OK.
- Plug on driver's memory seat adjustment control unit connected correctly.
- Battery voltage is OK.
- The Porsche System Tester II 9588 is functional.

NOTE: The function of the Porsche System Tester II 9588 and the diagnosis lead 9588/5 can be checked on another vehicle.

Possible causes of fault
- An incorrect vehicle type was selected on the Porsche System Tester II 9588.
- The Porsche System Tester II 9588 is not connected correctly or is faulty.
- Voltage supply to driver's memory seat adjustment control unit is not OK.
- K lead to gateway in instrument cluster does not function.
- Gateway in instrument cluster does not function.
- CAN drive does not function.
- Driver's memory seat adjustment control unit does not function.

Affected pins
Memory seat adjustment control unit, driver's: Connector G
- Pin 3 CAN bus high [CAN comfort (high)]
- Pin 4 CAN bus low [CAN comfort (low)]

Diagnosis/troubleshooting

16-pin diagnostic socket (driver's footwell)







Pin assignment of 16-pin diagnostic socket

Pin 1 - 16:

Work Instruction 1 - 4:

Work Instruction 5 - 6: