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DTC P0117 ENGINE COOLANT TEMPERATURE CIRCUIT LOW INPUT

DTC P0117 ENGINE COOLANT TEMPERATURE CIRCUIT LOW INPUT

DTC DETECTING CONDITION:


• Immediately at fault recognition

• GENERAL DESCRIPTION


TROUBLE SYMPTOM:


• Hard to start

• 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 engine coolant temperature sensor signal using Vehicle Diagnostic Interface or 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 procedures, refer to the OBD-II General Scan Tool Instruction Manual.


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

Yes

Repair the ground short circuit in harness between engine coolant temperature sensor and ECM connector.


No


CHECK HARNESS BETWEEN ENGINE COOLANT TEMPERATURE SENSOR AND ECM CONNECTOR.

Turn the ignition switch to OFF.

Disconnect the connector from engine coolant temperature sensor.

Turn the ignition switch to ON.

Read the data of engine coolant temperature sensor signal using Vehicle Diagnostic Interface or 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 procedures, refer to the OBD-II General Scan Tool Instruction Manual.


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

Yes

• Repair the poor contact.

•
Note

In this case, repair the following:

• Poor contact in engine coolant temperature sensor

• Poor contact in ECM

• Poor contact in coupling connector

• Poor contact in joint connector



No

Replace the engine coolant temperature sensor.