Fault code 4: Diagnosis/troubleshooting

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2005 Porsche 911, 2004 Porsche 911, 2003 Porsche 911, 2002 Porsche 911, and 2001 Porsche 911. However, it is still accessible from the selected car via links, so may be relevant.

DIAGNOSIS/TROUBLESHOOTING (FAULT CODE 4)

Work instruction			Display OK	If not OK
1	Check wire between alarm system control module and door lock (driver/passenger) for short circuit to ground.	Pull plug A off the control module. Pull plug off both door locks. Measure resistance between plug A pin 35 and ground.	Step 2	Repair wiring harness. -> End
2	Check wire between alarm system control module and door lock (driver/passenger) for short circuit to B+.	Switch on ignition. Measure voltage between plug A on control module pin 35 and ground.	0 V Step 3	Repair wiring harness. -> End
3	Check wire between alarm system control module and door lock (driver/passenger) for open circuit.	Switch off the ignition. Measure resistance between plug A pin 35 and plug on driver's door lock pin 5. Measure resistance between plug A pin 35 and plug on passenger's door lock pin 5.	< 5 Step 4	Repair wiring harness. -> End
4	Determine which door lock is faulty.	Select Door lock barrel in the Input signals menu item. Connect plug on passenger's door lock.	Door lock barrel not actuated. Step 5	Step 6
5	Determine which door lock is faulty.	Select Door lock barrel in the Input signals menu item. Connect plug on driver's door lock.	Door lock barrel not actuated.	Step 7
6	Replace door lock on passenger's side.		-> End
7	Replace door lock on driver's side.		-> End