How to test your seatbelt or pretensioner.

Scanning the vehicle is the fastest method of knowing if your seat belts and pretensioners are faulty.

Some scanners won’t specify if the seatbelt, pretensioner, or both are faulty, but this guide will help narrow it down for you.


Helpful Tip: Before removing any SRS components, you must first start off by disconnecting the battery.

Seatbelt rattling noise, or scrunched in pretensioner.

  • If the seatbelt has a rattling noise, or is locked up, that means it’s faulty.
  • If the plastic or cable on the pretensioner appears to be scrunched in, that means it’s deployed.

These are tell tale signs that the seatbelts /pretensioners are bad and will need to be repaired.

Checking the ohms with a multimeter on Seatbelts and pretensioners.

  • First, start off by removing the seatbelts and pretensioner.
  • Next, locate the charge with the 2 copper prongs.
  • Remove the plug inside that charge to get a proper reading.
  • Lastly, check the ohms on the 2 prongs.

This video will show you exactly how to check the ohms.

The meter should show between 2-3 Ohms. Anything below 2, or above 3 means that it’s bad.