Nissan Rogue (T33) 2021-Present Service Manual: P0118 Ect Sensor

Nissan Rogue (T33) 2021-Present Service Manual / Engine :: Engine Control System / Kr15ddt :: Dtc/circuit Diagnosis / P0118 Ect Sensor

DTC Description

DTC DETECTION LOGIC

DTC

CONSULT screen terms

(Trouble diagnosis content) 		DTC detection condition
P0118 00

ECT SEN/CIRC

(Engine coolant temperature sensor 1 circuit high) 		Diagnosis condition Ignition switch ON
Signal (terminal) Engine coolant temperature sensor signal
Threshold An excessively high voltage from the sensor is sent to ECM
Diagnosis delay time —

POSSIBLE CAUSE

  • Harness or connectors (The engine coolant temperature sensor 1 circuit is open or shorted.)

  • Engine coolant temperature sensor 1

FAIL-SAFE

Engine Control System

Fail safe mode Nissan Ariya Vehicle behavior
Combustion control mode Idle speed control Stops feedback control of idle speed and controls with specified speed.
Recovery speed control at decelerating Stops recovery speed control by the fuel cut at decelerating and controls with specified speed.
Idle neutral control Stops idle neutral control.

Stop/Start System

When a DTC is detected, the stop/start indicator lamp blinks slowly and the stop/start system operation is prohibited.

When ECM detects error while operating the stop/start system, ECM restarts the engine.

DTC Confirmation Procedure

PRECONDITIONING

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

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

  2. Turn ignition switch ON.

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

>>

GO TO 2.

PERFORM DTC CONFIRMATION PROCEDURE

  1. Turn ignition switch ON and wait at least 5 seconds.

  2. Check DTC.

Is DTC detected?

YES>>

Proceed to DTC Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

DTC Diagnosis Procedure

CHECK ENGINE COOLANT TEMPERATURE SENSOR 1 POWER SUPPLY

  1. Ignition switch OFF.

  2. Disconnect engine coolant temperature sensor 1 harness connector.

  3. Ignition switch ON.

  4. Check the voltage between ECT sensor 1 harness connector and ground.

    + −

    Voltage

    (Approx.)
    ECT sensor 1
    Connector Terminal
    F61 1 Ground 5 V

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 2.

CHECK ENGINE COOLANT TEMPERATURE SENSOR 1 POWER SUPPLY CIRCUIT

  1. Ignition switch OFF.

  2. Disconnect ECM harness connector.

  3. Check the continuity between ECT sensor 1 harness connector and ECM harness connector.

    + − Continuity
    ECT sensor 1 ECM
    Connector Terminal Connector Terminal
    F61 1 F71 101 Existed

  4. 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.

CHECK ENGINE COOLANT TEMPERATURE SENSOR 1 GROUND CIRCUIT

  1. Ignition switch OFF.

  2. Disconnect ECM harness connector.

  3. Check the continuity between ECT sensor 1 harness connector and ECM harness connector.

    + − Continuity
    ECT sensor 1 ECM
    Connector Terminal Connector Terminal
    F61 2 F71 102 Existed

  4. 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.

CHECK ENGINE COOLANT TEMPERATURE SENSOR 1

Check the engine coolant temperature sensor 1. Refer to Component Inspection.

Is the inspection result normal?

YES>>

Check intermittent incident. Refer to Intermittent Incident.

NO>>

Replace engine coolant temperature sensor 1. Refer to Removal and Installation.

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