Nissan Maxima Service and Repair Manual: P0117, P0118 ECT sensor

Description

Nissan Maxima. 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>

Nissan Maxima. Reference data

Nissan Maxima. Reference data

*: These data are reference values and are measured between ECM terminals 46 (Engine coolant temperature sensor) and 52 (Sensor ground).

DTC Logic

DTC DETECTION LOGIC

Nissan Maxima. DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following 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.

2.PERFORM DTC CONFIRMATION PROCEDURE

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

Diagnosis Procedure

1.CHECK GROUND CONNECTION

  1. Turn ignition switch OFF.
  2. Check ground connection E9.

2.CHECK ECT SENSOR POWER SUPPLY CIRCUIT

Nissan Maxima. CHECK ECT SENSOR POWER SUPPLY CIRCUIT

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

Nissan Maxima. CHECK ECT SENSOR POWER SUPPLY CIRCUIT

3.CHECK ECT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

Nissan Maxima. CHECK ECT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

  1. Turn ignition switch OFF.
  2. Disconnect ECM harness connector.
  3. Check the continuity between ECT sensor harness connector and ECM harness connector.
  4. Also check harness for short to ground and short to power.

4.CHECK ENGINE COOLANT TEMPERATURE SENSOR

5.CHECK INTERMITTENT INCIDENT

Component Inspection

1.CHECK ENGINE COOLANT TEMPERATURE SENSOR

Nissan Maxima. CHECK ENGINE COOLANT TEMPERATURE SENSOR

  1. Turn ignition switch OFF.
  2. Disconnect engine coolant temperature sensor harness connector.
  3. Remove engine coolant temperature sensor.
  4. Check resistance between engine coolant temperature sensor terminals as per the following.

Nissan Maxima. CHECK ENGINE COOLANT TEMPERATURE SENSOR

    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 a ...

    P0122, P0123 TP sensor
    Description Electric throttle control actuator consists of throttle control motor, throttle position sensor, etc. The throttle position sensor responds to the throttle valve movement. The ...

    Other materials:

    Parking lamp circuit
    Description The IPDM E/R (intelligent power distribution module engine room) controls the tail lamp relay based on inputs from the BCM over the CAN communication lines. When the tail lamp relay is energized, power flows through fuses 46 and 47, located in the IPDM E/R. Power then flows to the ...

    Main line between dlc and hvac circuit
    Diagnosis Procedure 1.CHECK HARNESS CONTINUITY (OPEN CIRCUIT) Turn the ignition switch OFF. Disconnect the battery cable from the negative terminal. Disconnect the following harness connectors. ECM A/C auto amp. Check the continuity betw ...

    Symptom diagnosis
    SQUEAK AND RATTLE TROUBLE DIAGNOSES Work Flow CUSTOMER INTERVIEW Interview the customer if possible, to determine the conditions that exist when the noise occurs. Use the Diagnostic Worksheet during the interview to document the facts and conditions when the noise occurs and any customer' ...

    Nissan Maxima Owners Manual

    Nissan Maxima Service and Repair Manual

    © 2017-2021 Copyright www.nimainfo.com
    0.0113