The front seat belt pretensioners are designed to deploy in moderate or severe frontal, near frontal collisions.
In addition, the pretensioners operate when a side collision (only on the side in which the collision occurs) or a roll-over accident is detected. The pretensioners operate differently depending on what types of air bags are equipped. For more details about seat belt pretensioner operation, refer to the SRS Air Bag Deployment Criteria.
Mazda 6 Owners Manual: Intermittent concern troubleshooting
Vibration Method
1. If malfunction occurs or becomes worse while driving on a rough road or
when engine is vibrating, perform the steps below.
Note
There are several reasons vehicle or engine vibration could cause
an electrical malfunction. Some of the things to check for are:
...
Mazda 6 Owners Manual: Electrical troubleshooting tools
Jumper wire
A jumper wire is used to create a temporary circuit. Connect the jumper
wire between the terminals of a circuit to bypass a switch.
Caution
Do not connect a jumper wire from the power source line to a body
ground. This may cause burning or other damage to wiring harnesse ...