Engine coolant temperature sensor and module

-


Engine Coolant Temperature (ECT) sensor



The ECT sensor is designed as an NTC resistor and is used to measure the exact ECT.
The PCM uses the signal from the ECT sensor to correct the following values:
  • Determination of injection duration
  • Engine idle speed
  • Control of cooling fan
  • Control of A/C compressor
A voltage of 5V is applied to the ECT sensor by the PCM. The PCM is able to determine the coolant temperature from the temperature-dependent voltage drop at the sensor.
If the signal from the ECT sensor fails, the cooling fan is on all the time and the A/C is turned off. When the ignition is switched on, the value from the IAT sensor is read. When the engine is running, the temperature is calculated using a temperature map stored in the PCM according to how long the engine has been running. This substitute value is then used as the basis for calculating the injected fuel quantity and the ignition timing.

Evaporative emission canister purge valve


The EVAP purge valve is only actuated by the PCM if the coolant temperature is at least 60°C. In that case the EVAP purge valve is opened and the vacuum in the intake manifold sucks ambient air through the activated charcoal in the evaporative emission canister. In this way the adsorbed hydrocarbons are led to the combustion chamber of the engine.
The EVAP purge valve is deactivated and purging of the system is halted as soon as the engine management system goes into idling and/or fuel adjustment mode.

Cooling fan module



The cooling fan module is directly supplied with battery power via a 60A fuse in the BJB. It is actuated via a PWM signal from the PCM depending on the operating state of the engine and the air-conditioning system.
The speed of the cooling fan motor is controlled according to this signal.



 
Power Steering Pressure (PSP) switch



The PSP switch registers pressure in the line between the power steering pump and the steering gear. When a predefined pressure is reached, the switch is opened, thereby allowing the PCM to stabilize the idle speed in good time.
If the PSP switch fails, this can lead to idling fluctuations which could cause the engine to stall in case of large steering deflections (when parking).

Commentaires

Enregistrer un commentaire

Posts les plus consultés de ce blog

Automatic Transmission - 6-Speed PowerShift Transmission - MPS6/6DCT450 - Diagnostic Strategy

-
Image
Diagnosis and Testing Refer to Wiring Diagrams Section 307-01, for schematic and connector information. General Equipment  diagnostic equipment Inspection and Verification Verify the customer concern. Visually inspect for obvious signs of mechanical or electrical damage. Visual Inspection Mechanical Electrical Fluid level too high/low Poor condition of fluid Fluid leak Damaged shift mechanism/linkages Damaged automatic transmission/ transaxle casing Fuse(s) Relay(s) Wiring harness Electrical connector(s) Selector lever module Transmission control module (TCM) If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step If the cause is not visually evident, verify the symptom and refer to the Ford diagnostic equipment to diagnose the system. Diagnostic Trouble Code (DTC) Chart NOTE: The following table should be used for guidance
Lire la suite

Electronic Engine Controls - 1.6L EcoBoost (118kW/160PS)

-
Image
Description and Operation Front view of engine Item Description 1 Variable camshaft timing oil control solenoid, exhaust camshaft 2 Ignition coil-on-plugs 3 CMP  (camshaft position)  Sensor - intake camshaft 4 Bypass solenoid valve 5 KS  (knock sensor)  sensor – cylinders 3 and 4 6 Electric throttle plate position sensors 7 Oil pressure switch 8 Shut-off solenoid valve 9 Electrically heated thermostat 10 KS  sensor – cylinders 1 and 2 11 The  MAP  (manifold absolute pressure)  sensor 12 Variable camshaft timing oil control solenoid, intake camshaft 13 Fuel pressure sensor – high-pressure circuit Rear view of engine Item Description 1 CMP  Sensor - exhaust camshaft 2 Fuel Metering Valve Comments: Part of the high-pressure fuel pump 3 Two-point  HO2S  (heated oxygen sensor) 4 Broadband  HO2S 5 The  ECT  (engine coola
Lire la suite

Diagnostic et essais Allumage automatique des phares

-
Image
Eclairage extérieur - Allumage automatique des phares Diagnostic et essais Se reporter au chapitre 417-01, du Manuel des schémas électriques pour les schémas et les informations sur les connecteurs. Outils spéciaux / Equipement d'atelier et outillage standard Kit de testeurs de bornes 29-011A Multimètre digital. Outil de diagnostic. Contrôle et vérification Note : Le module électronique générique (GEM) fait partie du boîtier électrique central (CJB). Note : Si le module GEM est remplacé, le module neuf doit être configuré après la pose. A cet effet, les données spécifiques au véhicule sont extraites du module à remplacer à l'aide de l'équipement de diagnostic et sont transférées dans le module neuf. Note : Avant d'extraire les données spécifiques au véhicule, s'assurer que toutes les connexions électriques du véhicule sont de nouveaux raccordées, de sorte que le module et l'outil de diagnostic puissent communiquer correct
Lire la suite