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Glass breakage sensor

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 something, e.g. a bunch of keys, near the sensor. The ISAT scan tool should display between 10 and 255.

If the ISAT scan tool shows the correct value, proceed to point 6. If the scan tool shows an incorrect value or an unchanged value, 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 scan tool should display "0". Loop between pins 1 and 2 in the connector and the scan tool should display 255. If the scan tool shows an incorrect value, proceed to point 3. If the scan tool shows the correct value, change the glass breakage sensor.

3. Check the function of the electronic control module

Unplug connector H10-4. Select "READ VALUES". Select "GLASS BREAK SENSOR". With the connector open, the scan tool should display "0". Loop between pins 2 and 3 in connector H10-4 and the scan tool should display 255.

If the scan tool shows the correct value, proceed to point 5. If the scan tool shows an incorrect value, proceed to point 4.

4. Check the cable assembly to the control module

Conduct a continuity test on the cable assembly between

• connector H10-4, pin 2 and the control module, pin 7.

• connector H10-4, pin 3 and the control module, pin 5. The resistance should be < 1 Ohm.

If the resistance is incorrect, take action on the cable assembly. If the resistance is correct, proceed to point 6.

5. Check the cable assembly to the glass breakage sensor

Conduct a continuity test on the cable assembly between

• connector H10-4, pin 2 and the glass breakage sensor, pin 1.

• connector H10-4, pin 3 and the glass breakage sensor, pin 2.

The resistance should be < 1 Ohm.

If the resistance is incorrect, take action on the cable assembly. If the resistance is correct, make a visual check of the sensor and connectors. If nothing can be found that can be corrected, change the glass breakage sensor.

6. 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 .