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

Mazda CX-5 Service & Repair Manual / Engine / Control / 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 ...

Heated Oxygen Sensor (HO2 S) Heater Control

Outline Based on the control of the HO2S heater, a stabilized oxygen concentration is detected even at low exhaust temperatures, and feedback control of fuel injection even at cold engine ...

Other materials:

Seat Weight Sensor Calibration [Two Step Deployment Control System]
CAUTION: If any of the following work is performed, perform the seat weight sensor calibration using the M-MDS. Replacement with a new seat weight sensor Replacement with a new seat weight sensor control module Replacement with new passenger-side seat pa ...

Rear Washer Hose Removal/Installation
1. Disconnect the negative battery cable.. 2. Remove the front over fender.. 3. Remove the mudguard (RH).. 4. Disconnect the rear washer hose A from the washer motor. 5. Remove the rear washer hose A from the washer tank hook. 6. Remove the rear washer hose A from clips A and B. 7. Disco ...

General Procedures (Brake)
Wheel and Tire Installation 1. When installing the wheels and tires, tighten the wheel nuts in a criss-cross pattern to the following tightening torque. Tightening torque 108—147 N·m {12—14 Kgf·m, 80—108 ft·lbf} Brake Lines Disconnection 1. If any brake line has been ...