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:

Powertrain System Outline [Fw6 A EL, Fw6 Ax EL]
Outline The powertrain consists of a 2-piece multi-plate clutch, 3-piece multi-plate brake, a one-way clutch, and a 3-piece single-type planetary gear. Construction Component parts list Component parts Movement Multi-plate clutch ...

Oil Seal (Differential) Replacement [C66 M R]
1. Remove the front under cover No.2.. 2. Drain the manual transaxle oil.. 3. Disconnect the drive shaft (LH) from the MTX.. 4. Disconnect the drive shaft (RH) from the MTX.. 5. Remove the oil seal (LH). 6. Remove the oil seal (RH). 7. Using the SSTs and a hammer, tap a new oil s ...

Electronic Control System Outline [Fw6 A EL, Fw6 Ax EL]
Outline In the electronic control system, the TCM calculates the control content based on signals from each type of sensor and switch to operate output parts such as each solenoid. In consideration of suppressed shift shock, smooth driving, and improved fuel economy, the TCM performs ...