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Fault code 1030: Diagnosis/troubleshooting

NOTE: Visual inspection: In the next troubleshooting section, please check first that the affected pins on the driver's door control unit plug connection are neither damaged nor corroded. The wiring and plugs of the affected components must also be checked for external damage and proper contact. Repair damaged or corroded pins if possible, otherwise replace affected pins. Repair or replace damaged wires.
NOTE: Sporadic faults: In the event of faults that occur sporadically, the wiring positions that are linked to moving parts on and in the vehicle must be checked for each system. Various statuses that can cause faults must be simulated with the help of the wiring diagram.
NOTE: Battery voltage: A battery voltage of between 11.4 and 14.5 V is required for the following troubleshooting procedure. This must be checked and provided, if necessary. On the vehicle electrical system, the voltage to the fuse (input side) must be guaranteed.
NOTE:
  • 'Short circuit to ground' → The fault is detected if there is ground potential for more than five minutes on plug C, pin 8
  • 'Implausible signal' → This fault is detected if the resistance between pins 1 and 8 on plug C is between 230 and 3,000 Ω.
WORK INSTRUCTION CHART

Work instruction Display OK If not OK
1 Check status of 'driver's door lock (key-operated switch)'
  • Use the Porsche System Tester II No. 9588 to switch to the menu 'Input signals/Driver's door lock (key-operated switch)'
 Status of 'driver's door lock (key-operated switch)' is: 'Open'
Go to step 2
Status of 'driver's door lock (key-operated switch)' is: 'Closed'
Go to step 2
Status of 'driver's door lock (key-operated switch)' is: 'Implausible'
Go to step 4
2 Check line from driver's door control unit to driver's door lock (key-operated switch) for short circuit to ground
  • Switch off ignition
  • Pull plug C off driver's door control unit
  • Measure resistance between control unit plug C, pin 8 and ground
 ∞ Ω
Go to step 3		 Repair line
→ End
3 Check line from driver's door control unit to driver's door lock (key-operated switch)
  • Pull off plug A on driver's door lock (key-operated switch)
  • Measure resistance between control unit plug C, pins 1 and 8
 ∞ Ω
Go to step 4		 Repair line
→ End
4 Check operation of door lock (key-operated switch)
  • Measure resistance between pins 5 and 8 of socket A on driver's door lock (key-operated switch)
 'Not actuated'
∞ Ω
'Open'
130 to 230 Ω
'Closed'
< b Ω
Go to step 6		 Go to step 5
5 Replace driver's door lock (key-operated switch) → End
6 Replace driver's door control unit → End
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