Component Location
General Description

Intake Air Temperature Sensor(IATS) is NTC thermistor. Installed inside of both MAFS and BPS, it senses intake air temperature. In case of EURO-4 diesel engine, IATS is installed in front of turbocharger(inside of MAFS) and behind it(inside of BPS). Comparing air temperature from both sensors(one is intake air temperature, the other is air temperature passing through turbo charger), more accurate sensing of intake air temperature is possible. With intake air temperature signal, ECM performs EGR control correction and fuel injection quantity correction.(MAFS is needed for EGR FEED BACK control in electronically controlled diesel engine. The calculation of air density at certain temperture is required to perform EGR FEED BACK control correctly.)

DTC Description

P0097 is set when the voltage below 73mV - minimum output voltage of IATS(integrated with BPS) - is detected for more than 2.0 sec. This code is due to short to ground in IATS signal circuit.

DTC Detecting Condition

Item

Detecting Condition

Possible Cause

DTC Strategy

● Voltage monitoring

● IATS circuit

● IATS component

Enable Conditions

● IG KEY "ON"

Threshold Value

● Output signal below minimum value( below 73mV )

Diagnostic Time

● 2.0 sec.

Fail Safe

Fuel Cut

NO

● Air temp. fixed at 28 ℃

EGR Off

NO

Fuel Limit

NO

Check Lamp

OFF

Specification

Temp.

- 40℃

- 20℃

0℃

20℃

40℃

60℃

80℃

Resistance

35.14~43.76KΩ

12.66~15.12KΩ

5.12~5.89KΩ

2.29~2.55KΩ

1.10~1.24KΩ

0.57~0.65KΩ

0.31~0.37KΩ

Schematic Diagram
note
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Signal Waveform
Яндекс.Метрика