Advertisement
Intake Air Temperature Sensor(ATS) Circuit Malfunction
DTC
P0110
Intake Air Temperature Sensor(ATS) Circuit Malfunction [Except Europe]
P0112
Intake Air Temperature Sensor(ATS) Circuit Low Voltage
P0113
Intake Air Temperature Sensor(ATS) Circuit High Voltage
DESCRIPTION
The Intake Air Temperature (ATS) sensor is in the MAF sensor. The ATS sensor is a variable resistor
whose resistance changes as the temperature of the air flowing through the air intake changes. ECU
uses the ATS sensor input to adjust fuel injector pulse width. When the temperature sensed is cold, the
ECU enriches fuel mixture by increasing injector pulse width; as the air warms, the injector pulse width
time is shortened.
TROUBLESHOOTING GUIDE
Background
a. The intake air temperature sensor converts the intake air
temperature to a voltage and outputs it.
b. ECU checks whether the voltage is within a specified range.
Check Area
a. Sixty seconds or more have passed since the engine was
started.
Judgment Criteria
a. Sensor output voltage has continued to be 4.6V or higher
[corresponding to an intake air temperature of -45°C (-49°F) or
lower] for 4 sec.
b. Sensor output voltage has continued to be 0.2V or lower
[corresponding to an intake air temperature of 125°C (257°F) or
higher] for 4 sec.
CIRCUIT DIAGRAM
TEST PROCEDURE
DTC detection condition
Diagnostic item
a. ATS sensor failed
b. Open or shorted mass air flow
sensor circuit, or loose
connector
c. ECU failed
Probable cause
Advertisement
