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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 temperature more than 55°C (131°F)?

Yes


No

• Repair the poor contact.

•
Note

In this case, repair the following:

• Poor contact mass air flow and intake air temperature sensor

• Poor contact in ECM

• Poor contact in joint connector



CHECK HARNESS BETWEEN MASS AIR FLOW AND INTAKE AIR TEMPERATURE SENSOR AND ECM CONNECTOR.

Turn the ignition switch to OFF.

Disconnect the connector from mass air flow and 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 temperature less than −36°C (−33°F)?

Yes

Replace the mass air flow and intake air temperature sensor.


No

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