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Fault code 1: Diagnosis/troubleshooting

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DIAGNOSIS/TROUBLESHOOTING (FAULT CODE 1)

Work instruction Display OK If not OK
1 Check country coding.
  • Connect and start the Porsche System Tester II 9588 and switch on the ignition.
  • Check the country coding in the Coding menu item.
 The control module is coded correctly.
Step 2		 Recode the control module.
-> End
2 Check micro switches of the door locks.
  • Switch on ignition.
  • Select the Input signals menu item.
  • Select switch positions Driver's side secured and Passenger's side secured
 Driver's side not secured.
Passenger's side not secured.
-> End		 Step 3
3 Check wiring from alarm system control module to door lock for short circuit to ground.
  • Switch off the ignition.
  • Pull plug A off the control module.
  • Depending on the test result from step 2, pull plug off the driver's and/or passenger's door lock.
  • Measure resistance between plug A on control module pin 5 and ground.
  • Measure resistance between plug A pin 28 and ground.
 Step 4 Repair wiring harness.
-> End
4 Check wiring from the alarm system control module to the door lock for short circuit to B+.
  • Switch on ignition.
  • Measure voltage between plug A on control module pin 5 and ground.
  • Measure voltage between plug A on control module pin 28 and ground.
 0 V
Step 5		 Repair wiring harness.
-> End
5 Check wiring from control module to door lock for open circuit.
  • Switch off the ignition.
  • Measure resistance between plug A on control module pin 5 and pin 7 of plug on left door lock.
  • Measure resistance between plug A on control module pin 28 and pin 7 of plug on right door lock.
 < 5
Step 6		 Repair wiring harness.
-> End
6 Check wire from the central locking switch to the control module for open circuit.
  • Pull plug off central locking switch.
  • Measure resistance between plug on central locking switch pin A1 and pin 29 of control module plug A.
 < 5
Step 7		 Repair wiring harness.
-> End
7 Depending on the test result of step 2, replace the driver's/passenger's door lock. -> End
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