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DTC P0112 INTAKE AIR TEMPERATURE CIRCUIT LOW INPUT

DTC P0112 INTAKE AIR TEMPERATURE CIRCUIT LOW INPUT

DTC DETECTING CONDITION:


Immediately at fault recognition

GENERAL DESCRIPTION


TROUBLE SYMPTOM:


Erroneous idling

Poor driving performance


Important

After repair or replacement of faulty parts, conduct Clear Memory Mode and Inspection Mode .


WIRING DIAGRAM:


CHECK CURRENT DATA.

Start the engine.

Read the data of intake air temperature sensor signal using Vehicle Diagnostic Interface or the OBD-II general scan tool.

Note
Vehicle Diagnostic Interface

For detailed operation procedure, refer to the “READ CURRENT DATA FOR ENGINE”.

OBD-II general scan tool

For detailed operation procedure, refer to the OBD-II General Scan Tool Instruction Manual.


Is the measured value more than 120°C (248°F)?

Yes


No

Repair poor contact.

Note

In this case, repair the following:

Poor contact in intake air temperature sensor

Poor contact in ECM

Poor contact in coupling connector

Poor contact in joint connector



CHECK HARNESS BETWEEN INTAKE AIR TEMPERATURE SENSOR AND ECM CONNECTOR.

Turn the ignition switch to OFF.

Disconnect the connector from intake air temperature sensor.

Turn the ignition switch to ON.

Read the data of intake air temperature sensor signal using Vehicle Diagnostic Interface or the OBD-II general scan tool.

Note
Vehicle Diagnostic Interface

For detailed operation procedure, refer to the “READ CURRENT DATA FOR ENGINE”.

OBD-II general scan tool

For detailed operation procedure, refer to the OBD-II General Scan Tool Instruction Manual.


Is the measured value less than −40°C (−40°F)?

Yes

Replace the intake air temperature sensor.


No

Repair ground short circuit in harness between intake air temperature sensor and ECM connector.