WwwWorkshop Manualscouk

911 Carrera (996)

Alarm system diagnosis

Fault, Fault code

Possible causes, elimination, notes

Short-circuit to voltage/ground or open circuit in plug I pin 30

Short-circuit to voltage/ground or open circuit in plug I pin 32

Door lock (driver/passenger) is faulty

Wrong country coding: Check coding

Pull plug I off the alarm system control module

Pull plug off Switch for central locking and switch on ignition

Voltmeter at plug I pin 29 and ground Voltmeter display: 0 V

Ohmmeter at alarm system control module plug I pin 29 and ground Ohmmeter display: <*> Q

Ohmmeter at alarm system control module plug I pin 29 and plug on switch for central locking pin 1

Pull plug off door lock (driver's side / passenger's side)

Voltmeter at plug I pin 5 and ground, ignition on

Ohmmeter at alarm system control module plug I pin 5 and ground Ignition off, ohmmeter display: °° Q

Ohmmeter at alarm system control module plug I pin 5 and pin 7 of both plugs on driver/passenger side door lock Ohmmeter display: < 5 Q

Voltmeter at plug I pin 28 and ground, ignition on

Ohmmeter at alarm system control module plug I pin 28 and ground

Ohmmeter at alarm system control module plug I pin 30 and ground

Ohmmeter at alarm system control module plug I pin 30 and pin 3 of both plugs on driver's side / passenger side door lock

Voltmeter at plug I pin 32 and ground

Ohmmeter at alarm system control module plug I pin 32 and ground

Ohmmeter at alarm system control module plug I pin 32 and pin 3 of both plugs on driver/passenger side door lock

Pull plug II off the alarm system control module

Voltmeter at plug II pin 3 and ground

Ohmmeter at alarm system control module plug II pin 3 and ground

Ohmmeter on alarm system control module plug II pin 3 and pin 1 of both plugs on door lock (driver's side / passenger's side) Ohmmeter display: < 5 Q

Test point 57

Unknown fault code Fault code XX

1. Inspect the ground points for corrosion.

2. Clear fault memory.

Event memory

The event memory stores the contact or triggering type that triggered the alarm. The priming type also is saved.

A maximum of 10 events can be saved. If another event is added, the oldest one is deleted. The event with the highest number is the most current one.

An alarm can be triggered by the following components:

Door contact, driver

Door contact, passenger

Central locking contact "locked", driver

Central locking contact "locked", passenger

Front lid

Rear lid

Radio contact

External switch contact 1

External switch contact 2

Oddments tray

Switch, convertible top/sliding roof Switch, convertible top compartment lid Alarm horn

Passenger compartment monitoring

Terminal 15 on Note

Up to three alarm triggering possibilities exist via the passenger compartment monitoring system and the external switching contacts.

With the priming type, a distinction is made between:

Locked via lock

Emergency-locked

.ocked via radio

Self-primed

System test

Primed after battery connection Secured via lock Secured via radio

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