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Fault code 0929: Diagnosis/troubleshooting

NOTE: Visual inspection: In the next troubleshooting section, please check first that the affected pins on the passenger'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: This fault is detected if the required target state is not reached within 2 seconds.
WORK INSTRUCTION CHART

Work instruction Display OK If not OK
1 Check fault memory for further entries
  • Fault code 97: Passenger's door lock (secure actuating element)
  • 1553: Passenger's door lock (lock actuating element)
=> Correct faultsGo to step 2
2 Check passenger's door lock for smooth mechanical operation Go to step 3 Go to step 7
3 Check line for short circuit to B+
  • Switch off ignition
  • Pull plug C off passenger's door control unit
  • Pull plug off door lock
  • Measure voltage between control unit plug C, pin 3 and ground
 < 0.3 V
Go to step 4		 Repair line
→ End
4 Check line for short circuit to ground
  • Measure resistance between control unit plug C, pin 3 and ground
 ∞ Ω
Go to step 5		 Repair line
→ End
5 Check line for open circuit
  • Measure resistance between control unit plug C, pin 3 and door lock plug, pin 3
 < 5 Ω
Go to step 6		 Repair line
→ End
6 Check status of 'passenger's door lock'
  • Use the Porsche System Tester II No. 9588 to switch to the menu 'Input signals/Passenger's door lock (checkback)'
  • Check all statuses of door lock
 Status of 'door lock (checkback)' changes according to switch actuation to:
'Unlocked'
'Locked'
'Secured'
Go to step 8		 Go to step 7
7 Replace passenger's door lock → End
8 Replace passenger's door control unit → End
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