Glass Breakage Sensor

Fault diagnosis, glass breakage sensor

Fault symptom
Grass breakage sensor does not trip the alarm.

Action
1 Check the function of the glass breakage sensor
Connect the ISAT scan tool.
Select "READ VALUES".
Select "GLASS BREAK SENSOR".
Jingle a set of keys next to the sensor.
The ISAT scan tool should display between 10 and 255.
If the ISAT scan tool shows the correct value, proceed to point 5.
If the ISAT scan tool shows an incorrect value or if the value remains unchanged, proceed to point 2.
2 Check the function of the glass breakage sensor
Disconnect the glass breakage sensor by unplugging the 4 pin connector.
Select "READ VALUES".
Select "GLASS BREAK SENSOR"
If the connector remains open, the ISAT scan tool should display "0".
Connect jumper between pins 2 and 4 in the connector and the ISAT scan tool should display 255.
If the ISAT scan tool displays the correct value, proceed to point 4.
If not, proceed to point 3.







3 Check the cable assembly
Conduct a continuity test on the cable assembly between:
- connector, pin 2 and alarm control module, pin 7.- connector, pin 2 and alarm control module, pin 5.
The resistance should be <1 Ohm.
If the resistance is incorrect, remedy the fault in the cable assembly.
If the resistance is correct, proceed to point 5.
4 Check the glass breakage sensor
Make a visual inspection of the sensor and connector. If nothing can be seen that can be remedied, change the glass breakage sensor.
5 Final test
Disconnect the ISAT scan tool.
Close all doors.
Arm the alarm and wait until the LED flashes 1 flash/2 seconds.
Jingle the set of keys next to the sensor.
If the alarm is not set off, proceed to "Before Changing the Electronic Control Module". Before Changing the Electronic Control Module