Antitheft and Alarm System

Full in the electronic control module

Fault symptom
The theft alarm is not working at all Unspecified (due to an internal memory fault/programming fault, different functions can be affected)

Conditions
Electronic control module fault (internal) generates diagnostic trouble code

Action
1 Check if a diagnostic trouble code is registered
Erase the diagnostic trouble code, test drive the car and check to see if the diagnostic trouble code is re-registered.
If the diagnostic trouble code is registered, proceed to point 2.
If the diagnostic trouble code is not registered, the fault is intermittent.
2 Check the theft alarm control module connector
Remove the control module.
- Check the connector for loose contact sleeves.
- Check the control module ground and voltage supply:
pin 25 (+30)
pin 10 (+15)
pin 13 (GND)
Reinstall the control module, proceed to point 3.
3 Check if a diagnostic trouble code is registered
Erase the diagnostic trouble code, test drive the car and check to see if the diagnostic trouble code is re-registered.
If the diagnostic trouble code is registered, proceed to "Before Changing the Electronic Control Module".
If the diagnostic trouble code is not registered, the action taken is correct or the fault is of intermittent type.