Fault code 1: Diagnosis/troubleshooting

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