Antitheft and Alarm Systems: Testing and Inspection

Vehicles with anti-theft alarm system can be recognized as follows:

- Insert the key into door lock, turn to locked position and hold on while opening and closing another door. The alarm system indicator light (LED) in the door flashes with door closed and does not flash with door open.

- Another characteristic of the anti-theft alarm system is the number of connectors on the anti-theft alarm system control module. The control module contains a 6-pin and a 10-pin connection.

NOTE: The optical and acoustical signal for alarm is: USA: 450 optical and acoustical impulses (alarm horn and flasher lights).

Impulse duration 0.5 sec
Alarm duration 225 sec

The following tools are required for troubleshooting:
^ Multimeter Fluke 83 (US 1119)
^ Connector test kit VW 1594
^ Valid wiring diagram

Troubleshooting - Checking Anti-theft Alarm System Cannot Be Switched ON (Part 1 Of 3):

Troubleshooting - Checking Anti-theft Alarm System Cannot Be Switched ON (Part 2 Of 3):

Troubleshooting - Checking Anti-theft Alarm System Cannot Be Switched ON (Part 3 Of 3):

Anti-theft Alarm System Cannot be Switched ON

Test Conditions:
^ Power windows and central locking system fuse OK
^ Battery voltage OK
^ Trunk lid/rear hatch closed and locked
^ Doors closed
^ Hood closed

Troubleshooting - Checking Anti-theft Alarm System Cannot Be Switched OFF:

Anti-theft Alarm System Cannot be Switched OFF

Test Conditions:
^ Anti-theft alarm system switched ON
^ Battery voltage OK

Troubleshooting - Checking Anti-theft Alarm System Dose Not Trigger Alarm Horn:

Activated Anti-theft Alarm System does not Trigger Alarm Horn

Test Conditions:
^ Anti-theft alarm system activated
^ Battery voltage OK

Troubleshooting - Checking Starter Dose Not Crank With Anti-theft Alarm System Switch OFF:

Starter does not Crank with Anti-theft Alarm System Switched OFF

Test Conditions:
^ Anti-theft alarm system switched OFF
^ Battery voltage OK