Mazda CX-5 Service & Repair Manual: Engine Coolant Temperature (ECT) Sensor

Mazda CX-5 Service & Repair Manual / Engine / Cooling / Engine Coolant Temperature (ECT) Sensor

Purpose/Function

Detects the ECT as basic information for mainly determining the fuel injection amount.
Detects the ECT and inputs it to the PCM as an ECT signal.
The ECT sensor No.2 is only used for OBD.

Construction

ECT sensor No.1

Installed to the water outlet case.
A thermistor has been adopted as the detecting element for detecting the ECT.

ECT sensor No.2

Installed on the water pipe.
A thermistor has been adopted as the detecting element for detecting the ECT.

Operation

Inputs the signal, which fluctuates according to the ECT, to the PCM.

ECT sensor characteristic

Fail-safe

ECT sensor No.1


DTC No.	Fail-safe function
P0117:00	Fixes the water temperature for the engine control at 40 °C {104 °F}, and for the idle air control at 80 °C {176 °F}. Operates the cooling fan (high speed rotation). Inhibits the fuel cut control during shift change.
P0118:00	Fixes the water temperature for the engine control at 40 °C {104 °F}, and for the idle air control at 80 °C {176 °F}. Operates the cooling fan (high speed rotation). Inhibits the fuel cut control during shift change.

ECT sensor No.2

Function not equipped.

Engine Coolant Temperature (ECT) Sensor Removal/Installation

WARNING: When the engine is hot, it can badly burn. Turn off the engine and wait until it is cool before removing the ECT sensor. ECT Sensor No.1 1. Disconnect the negative battery c ...

Fan Switch Inspection [Manual Air Conditioner]

1. Disconnect the negative battery cable.. 2. Remove the following parts: a. Shift lever knob (MTX). b. Glove compartment. c. Front console box. d. Shift panel. e. Upper panel. f. Rear c ...

Other materials:

Vent Operation
Adjusting the Vents Directing airflow To adjust the direction of airflow, move the adjustment knob. NOTE hen using the air conditioner under humid ambient temperature conditions, the system may blow fog from the vents. This is not a sign of trouble but a result of humid air being suddenly co ...

License Plate Light Removal/Installation
1. Disconnect the negative battery cable.. 2. Remove the following parts: a. Liftgate upper trim. b. Liftgate side trim. c. Liftgate lower trim. 3. Disconnect the connector. 4. While pressing the license plate light tab in the direction of arrow (1) shown in the figure, press the l ...

Outer Mirror Garnish Removal/Installation
1. Disconnect the negative battery cable.. 2. Remove the outer mirror glass.. 3. Insert a tape-wrapped flathead screwdriver into the upper outer mirror garnish and remove tab A, B, C, D in the direction of arrow (1). 4. Insert a tape-wrapped flathead screwdriver into the upper outer mirr ...