Nissan Altima 2007-2012 Service Manual: P0116 ect sensor

Description

The engine coolant temperature sensor is used to detect the engine coolant temperature. The sensor modifies a voltage signal from the ECM. The modified signal returns to the ECM as the engine coolant temperature input. The sensor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases.

<Reference data>


<Reference data>


*: These data are reference values and are measured between ECM terminals 46


*: These data are reference values and are measured between ECM terminals 46 (Engine coolant temperature sensor) and ground. CAUTION: Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in damage to the ECM's transistor.

Use a ground other than ECM terminals, such as the ground.

DTC Logic

DTC DETECTION LOGIC

NOTE: If DTC P0116 is displayed with P0117 or P0118, first perform the trouble diagnosis for DTC P0117, P0118. Refer to EC-711, "DTC Logic".

DTC CONFIRMATION PROCEDURE


DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING

If DTC confirmation procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.

>> GO TO 2.

2.PERFORM DTC CONFIRMATION PROCEDURE

1. Start engine and warm it up to normal operating temperature.

2. Rev engine up to 2,000 rpm for more than 10 minutes.

3. Move the vehicle to a cool place, then stop engine and turn ignition switch OFF.

4. Check resistance between

    P0112, p0113 iat sensor
    Description The intake air temperature sensor is built-into mass air flow sensor (1). The sensor detects intake air temperature and transmits a signal to the ECM. The temperature sensing unit us ...

    P0117, p0118 ect sensor
    Description The engine coolant temperature sensor is used to detect the engine coolant temperature. The sensor modifies a voltage signal from the ECM. The modified signal returns to the ECM as the ...

    Other materials:

    Center speaker
    Description The audio unit sends audio signals to the BOSE speaker amp. The BOSE speaker amp. amplifies the audio signals before sending them to the center speaker using the audio signal circuits. Diagnosis Procedure 1.HARNESS CHECK 1. Disconnect BOSE speaker amp. connector B121 and center ...

    Instrument panel
    1. Instrument brightness control/Trip computer reset switch 2. Vents 3. Headlight/fog light (if so equipped)/turn signal switch 4. Driver supplemental air bag/horn 5. Meters and gauges 6. Paddle shift controls (if so equipped) 7. Windshield wiper/washer switch 8. Hazard warning flasher ...

    Function diagnosis
    STARTING SYSTEM System Diagram System Description The starter motor plunger closes and provides a closed circuit between the battery and the starter motor. The starter motor is grounded to the cylinder block. With power and ground supplied, the starter motor operates. Component Descriptio ...