Seat Cushion

WARNING: This page is about a different car, the 2005 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

Remove the front seat. (See FRONT SEAT REMOVAL/INSTALLATION .)
Remove the seat cushion trim.
While inspecting for continuity between the connector terminals A and B, use a dryer to warm the thermostat of the seat warmer unit on seat cushion.

Fig 1: Testing Seat Warmer Thermostat
Courtesy of MAZDA MOTORS CORP.
When the ohmmeter indicates that there is no continuity, turn off the dryer, then use a thermometer to measure the temperature of the thermostat.
Verify that the temperature is approximately 37 °C {99 °F} .

Fig 2: Measuring Temperature Of Thermostat
Courtesy of MAZDA MOTORS CORP.
Using an ohmmeter, verify that there is continuity between the seat warmer unit connector terminals when temperature drops to approximately 28 °C {82 °F} .
- If not as indicated in the table, replace the seat warmer unit.
  
  Fig 3: Thermostat Continuity Table
  Courtesy of MAZDA MOTORS CORP.
  
  Fig 4: Seat Warmer Circuit Diagram And Connector Terminals
  Courtesy of MAZDA MOTORS CORP.