Guard Alarm II (Only)

Button "Run Self Test"
Press button C "Run self test".
Lower display line reads "TESTING..."





If control module is OK:
If no fault is found in the control module, the lower line of the display will read "TEST OK!"
If control module is faulty, display will read "ERRCODE XXX" (where "XXX" is a 3-digit DTC).


NOTE: DTC (ERR CODE) must always be quoted when returning a control module.