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911 Carrera (996)

Alarm system diagnosis

Fault, Fault code

Possible causes, elimination, notes

Short circuit to voltage/ground or open circuit in plug II pin 19

Door lock (driver/passenger) is faulty

Elimination:

In the menu item Drive links, select "Secure doors" and carry out the function test

In the menu item Input signals, select "Driver's side secured" and "Passenger's side secured" and compare the switch positions with the input signals table.

Pull plugs I and II off the alarm system control module

Ohmmeter on plug II pin 1 and ground Ohmmeter display: < 5 Q

Voltmeter at plug II pin 8 and ground

Voltmeter display: Battery voltage

If 0 V is displayed, check fuse C3

Voltmeter at plug II pin 9 and ground Voltmeter display: 0 V

Ohmmeter on plug II pin 9 ground Ohmmeter display: °° Q

Ohmmeter on plug II pin 9 and plug on door lock (driver's side / passenger's side) pin 2 Ohmmeter display: < 5 Q

Voltmeter at plug I pin 19 and ground Voltmeter display: 0 V

Ohmmeter at plug I pin 19 and ground Ohmmeter display: °° Q

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