Ambient Temperature Sensor Inspection

1. Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION .)
2. Remove the front under cover. (See FRONT UNDER COVER REMOVAL/INSTALLATION .)
3. Remove the ambient temperature sensor. (See AMBIENT TEMPERATURE SENSOR REMOVAL/INSTALLATION .)
4. Measure the temperature around the ambient temperature sensor and measure the resistance between the ambient temperature sensor terminals A and B.
   Fig 1: Identifying Ambient Temperature Sensor Connector Terminal

   Courtesy of MAZDA MOTORS CORP.
   • If the characteristics of the ambient temperature sensor are not as shown in the graph, replace the ambient temperature sensor. (See AMBIENT TEMPERATURE SENSOR REMOVAL/INSTALLATION .)

Fig 2: Ambient Temperature Sensor Characteristics Graph

Courtesy of MAZDA MOTORS CORP.