Air Temperature Sensor ( Ambient / Intake ): Testing and Inspection

INTAKE AIR TEMPERATURE SENSOR (ATS)




The Intake Air Temperature Sensor (ATS) located on the intake manifold is a resistor-based sensor for detecting the intake air temperature. According to the intake air temperature information from the sensor, the ECM provides necessary fuel injection amount control.

Circuit Diagram (ATS):

Harness Connector:

Trouble Shooting Procedure (ATS):

TROUBLESHOOTING HINTS
The MIL is turned ON and DTC (Diagnostic Trouble Code) displayed on Hi-scan under the conditions as below.
1. The manifold pressure indicates 118 mb or less for 0.1 second when the ignition key is turned on.
2. The manifold pressure indicates 118 mb or less when the rate is 1980 rpm or less.
3. The rate is 2400 rpm or above when the manifold pressure indicates 986 mb or above, or the accelerator pedal is released (on deacceleration).

Harness Inpection Procedures (ATS):