Use Diagnostic Trouble Codes (DTCs) (from the DTC checks) in the table below to determine the trouble area and proper inspection procedure. The Supplemental Restraint System (SRS) diagnostic trouble code chart is shown below as an example.

Symptom simulation
Problem symptoms tableSeat belt pretensioners (front seats)
The pretensioners help the seat
belts to quickly restrain the occupants
by retracting the seat belts
when the vehicle is subjected to
certain types of severe frontal collision
or a vehicle rollover.
The pretensioners do not activate
in the event of a minor frontal
impact, a side impact or ...