Inspection Of Resistance

NOTE:

Disconnect the IAT sensor connector.
Remove the IAT sensor.
Place the IAT sensor in water with a thermometer, and heat the water gradually.

Fig 1: Testing Intake Air Temperature Sensor
Courtesy of MAZDA MOTORS CORP.
Measure the resistance of the IAT sensor using an ohmmeter.
- If IAT sensor is okay, but PID value is out of specification, perform the "Circuit Open/Short Inspection". See CIRCUIT OPEN/SHORT INSPECTION .
- If not as specified, replace the IAT sensor.
Specification

Fig 2: IAT Sensor Resistance Specifications
Courtesy of MAZDA MOTORS CORP.

Fig 3: IAT Sensor Signal Characteristics
Courtesy of MAZDA MOTORS CORP.
Reconnect the IAT sensor connector.