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Seat Warmer Unit Inspection

WARNING: This page is about a different car, the 2003 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the front seat. (See FRONT SEAT REMOVAL/INSTALLATION  .)
  2. Remove the seat cushion trim.
  3. 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: Warming Seat Warmer Thermostat
    G01931089Courtesy of MAZDA MOTORS CORP.
  4. When the ohmmeter indicates that there is no continuity, turn off the dryer, then use a thermometer to measure the temperature of the thermostat.
  5. Verify that the temperature is approximately 29 °C {84 °F}. 
    Fig 2: Measuring Seat Temperature
    G01931090Courtesy of MAZDA MOTORS CORP.
  6. Using an ohmmeter, verify that there is continuity between the seat warmer unit connector terminals when temperature drops to approximately 20 °C {68 °F}. 
    Fig 3: Thermostat Temperature/ Terminal Continuity Chart
    G01931091Courtesy of MAZDA MOTORS CORP.
    Fig 4: Identifying Seat Warmer Unit Circuit & Connector Terminals
    G01931092Courtesy of MAZDA MOTORS CORP.
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