Nissan Rogue Service Manual: P0117, P0118 ECT sensor

Nissan Rogue Service Manual / Engine / Engine Control System / DTC/Circuit diagnosis / P0117, P0118 ECT sensor

DTC Description

DTC DETECTION LOGIC

DTC No.	CONSULT screen terms (Trouble diagnosis content)	DTC detecting condition
P0117	ECT SEN/CIRC (Engine coolant temperature sensor 1 circuit low)	An excessively low voltage from the engine coolant temperature sensor is sent to ECM.
P0118	ECT SEN/CIRC (Engine coolant temperature sensor 1 circuit high)	An excessively high voltage from the engine coolant temperature sensor is sent to ECM.

POSSIBLE CAUSE

Harness or connectors (Engine coolant temperature sensor circuit is open or shorted.)
Engine coolant temperature sensor

FAIL-SAFE

Not applicable

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

Turn ignition switch OFF and wait at least 10 seconds.
Turn ignition switch ON.
Turn ignition switch OFF and wait at least 10 seconds.

>> GO TO 2.

2.PERFORM DTC CONFIRMATION PROCEDURE

Turn ignition switch ON and wait at least 5 seconds.
Check DTC.

Is DTC detected? YES >> Proceed to EC-213, "Diagnosis Procedure".

NO >> INSPECTION END

Diagnosis Procedure

1.CHECK ENGINE COOLANT TEMPERATURE SENSOR POWER SUPPLY

Turn ignition switch OFF.
Disconnect engine coolant temperature (ECT) sensor harness connector.
Turn ignition switch ON.
Check the voltage between ECT sensor harness connector and ground.

Check engine coolant temperature sensor power supply

Is the inspection result normal? YES >> GO TO 3.

NO >> GO TO 2.

2.CHECK ENGINE COOLANT TEMPERATURE SENSOR POWER SUPPLY CIRCUIT

Turn ignition switch OFF.
Disconnect ECM harness connector.
Check the continuity between ECT sensor harness connector and ECM harness connector.

Check engine coolant temperature sensor power supply circuit

Also check harness for short to ground.

Is the inspection result normal? YES >> Perform the trouble diagnosis for power supply circuit.

NO >> Repair or replace error-detected parts.

3.CHECK ENGINE COOLANT TEMPERATURE SENSOR GROUND CIRCUIT

Turn ignition switch OFF.
Disconnect ECM harness connector.
Check the continuity between ECT sensor harness connector and ECM harness connector.

Check engine coolant temperature sensor ground circuit

Also check harness for short to ground to power.

Is the inspection result normal? YES >> GO TO 4.

NO >> Repair or replace error-detected parts.

4.CHECK ENGINE COOLANT TEMPERATURE SENSOR

Check the engine coolant temperature sensor. Refer to EC-212, "Component Inspection".

Is the inspection result normal? YES >> GO TO 5.

NO >> Replace engine coolant temperature sensor. Refer to CO-23, "Exploded View".

5.CHECK INTERMITTENT INCIDENT

Refer to GI-41, "Intermittent Incident".

>> INSPECTION END

Component Inspection

1.CHECK ENGINE COOLANT TEMPERATURE (ECT) SENSOR

Turn ignition switch OFF.
Disconnect ECT sensor harness connector.
Remove ECT sensor.
Check resistance between ect sensor terminals by heating with hot water as shown in the figure.

Check engine coolant temperature (ECT) sensor

Is the inspection result normal?

YES >> INSPECTION END

NO >> Replace engine coolant temperature sensor. Refer to CO-23, "Exploded View".

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