Seat Weight Sensor Inspection [Two Step Deployment Control System]
If any of the following work is performed, perform the seat weight sensor inspection using the M-MDS.
Removal of the passenger-side seat
Loosening and retightening of passenger’s seat fixing bolts
Or, the vehicle is involved in a collision
If any of the following work is performed, perform the seat weight sensor calibration using the M-MDS..
Replacement with a new seat weight sensor
Replacement with a new seat weight sensor control module
Replacement with new passenger-side seat parts
Disassembly of the passenger-side seat
1. Connect the M-MDS (IDS) to the DLC-2.

2. After the vehicle is identified, select the following items from the initialization screen of the IDS.
a. Select “Body”.
b. Select “Restraints”.
3. Then, select item from the screen menu in the following order.
a. Select “Passenger Seat Weight Sensor ReZero”.
4. Then, select item from the SWS Calibration screen menu in the following order.
a. Select “(2)-When the passenger seat was removed and reinstalled.”
5. Perform inspection following the procedures on the M-MDS screen.
Test yourself
A quick Mazda 3 quiz: every answer comes with an explanation and a link to the manual page.