How many wires are in an IAT sensor?
Some IAT sensors are a combined unit with a MAF sensor and will contain 5+ wires. To troubleshoot IAT Sensor error codes, unplug the IAT sensor and measure voltage across terminals from the ECU. You should see 5V otherwise the problem is elsewhere and not in the sensor.
What do IAT and iat2 stand for?
Usually, IAT or IAT1 refer to the sensor measuring air temperature coming into the mass air flow (MAF) meter. Because air temperature increases under compression, from the turbocharger or supercharger, sensor IAT2 is used to measure air temperature after just after the compressor.
What does IAT stand for in forced induction engine?
Forced-induction engines have two IAT sensors. Usually, IAT or IAT1 refer to the sensor measuring air temperature coming into the mass air flow (MAF) meter. Because air temperature increases under compression, from the turbocharger or supercharger, sensor IAT2 is used to measure air temperature after just after the compressor.
How is the density of air determined by the IAT sensor?
The density of the air is established by air temperature and air volume (as measured by the MAF sensor). The IAT sensor is a variable resistor that changes with temperature. The higher the temperature, the lower the resistance and vice versa.
How does the resistance of the IAT sensor work?
Using a 5V reference signal (sent by the ECU – Engine Control Unit) the resistance of the IAT sensor will decrease the signal in proportion to the colder air temperature. The resistance is a calibrated value, so as voltage drops across the IAT sensor the ECU establishes the air temperature from the voltage received.
Usually, IAT or IAT1 refer to the sensor measuring air temperature coming into the mass air flow (MAF) meter. Because air temperature increases under compression, from the turbocharger or supercharger, sensor IAT2 is used to measure air temperature after just after the compressor.
How do you check a two wire iat2?
To check a two-wire IAT2, turn the key off and disconnect IAT2. Measure resistance across the sensor terminals and compare it to the current temperature and a temperature / resistance chart, which you can find in your repair manual. If the voltage / resistance is incorrect, suspect a sensor problem. Replace as needed.
Where is the IAT sensor located on the MAF?
It is located on the mass air flow censor on the intake. it is connected right on the out side of it. It has 5 wires running to it. The IAT sensor will be built into the MAF. You can choose the wires from this sensor: Should be a red wire and 2C should be a lg/yellow for the IAT installation. IAT is built into your MAF sensor.