Vehicle Engine Management Systems Honda Civic 6

Engine management systems — general information
In order to reduce the level of emissions into the atmosphere of toxic components that enter the composition of the exhaust gases of the engine as a result of incomplete combustion of the fuel, as well as to maintain...

The layout of the components of engine management systems
The layout of the components of engine management systems / reducing the toxicity of exhaust gases in the engine compartment of the car (Civic) 1 - ECM/PCM with test connector (under the dashboard); 2 - Electrical load...

Engine Management Specifications
Characteristic Meaning SKR circuit resistance, Ohm Civic 350÷700 Integra 500÷1000 CYP circuit resistance, Ohm Civic 350÷700 Integra 500÷1000 TDC circuit resistance, Ohm Civic 350÷700 Integra 500÷1000 Intake air...

On-board diagnostics (OBD) system — the principle of operation and fault codes
Information about diagnostic tools Checking the correct functioning of the components of the injection systems and reducing the toxicity of exhaust gases is carried out using a universal digital meter (multimeter). The...

Removal and installation of PCM / ECM
Warning! Most of the models covered in this manual are equipped with SRS. Before doing any work near the airbag unit, steering column or instrument panel, turn off the SRS to avoid injury if it is accidentally deployed...

Checking and replacing the throttle position sensor (TPS)
Examination 1. Follow the wiring harness from the TPS to the rear of the intake manifold and remove it from the bulkhead of the engine compartment to provide additional work space to check that the connectors are...

Checking and replacing the absolute pressure sensor in the pipeline (MAP)
Examination 1. Check up reliability of connection to the gauge of an electric socket. Evaluate the reliability of the landing of the terminals and the condition of the wiring. If necessary, make the appropriate...

Checking and replacing the intake air temperature (IAT) sensor
Examination 1. With the ignition on, disconnect the wiring from the IAT sensor located on the intake manifold (see accompanying illustration). Using an ohmmeter, measure the resistance between the two terminals on the...

Checking and replacing the engine coolant temperature sensor (ECT)
Examination 1. The ECT sensor is a thermistor (resistor whose resistance changes with temperature). A change in sensor resistance has a direct effect on the amplitude of the signal output by the sensor to the ECM/PCM....

Checking and replacing the TDC sensor / crankshaft position / piston position in the cylinders (TDC / SKR / CYP)
On the models under consideration, the crankshaft position sensor structurally consists of three parts that track, respectively, the actual position of the shaft, the position of the TDC of the engine (TDC sensor) and...

Checking and replacing the crankshaft fluctuation sensor (CKF)
The CKF sensor consists of a pulse rotor located on the front crankshaft trunnion and an inductive sensor assembly attached to the engine close to the rotor. The ECM/PCM uses information from the CKF sensor to determine...

Checking and Replacing the Electrical Load Monitoring Detector (ELD)
The ELD system detects signs of overload in the electrical circuits of external lighting and signaling systems, fuel injection, charging, etc. The first symptom of this kind of overload is a violation of the stability...

Checking and replacing the pressure switch in the power steering system (PSP)
The PSP switch is used on models manufactured for the US market and is a normally closed switch. The sensor-switch is included in the hydraulic line and is located near the rack and pinion housing. When turning the...

Checking and replacing the oxygen sensor (λ-probe)
A λ probe located in the engine exhaust manifold monitors the oxygen content in the exhaust gas stream. When O2 molecules come into contact with the sensitive element of the probe, the sensor generates an amplitude...

Checking the condition and replacing the knock sensor
Attention! Allow the engine to cool completely before removing the oxygen sensor. The knock sensor responds to an increase in engine vibration, usually caused by detonation of the air/fuel mixture. Based on the...

Checking and replacing the vehicle speed sensor (VSS)
The VSS is mounted on the transmission housing and is a variable magnetic resistance sensor that begins to generate voltage pulses as soon as the vehicle speed exceeds 4.8 km / h (3 mph). The pulses from the sensor are...

Idle stabilization system — checking and replacing the IAC valve
General information When the engine is idling, the composition of the air-fuel mixture is controlled by the idle speed stabilization system (IAC). On Civic models, the system consists of a PCM and an IAC valve, on...

Checking and replacing the temperature-sensitive valve of fast idle speed (FIT)
The FIT valve is installed on some vehicle models and is used to increase idle speed by introducing additional air into the intake manifold during engine warm-up. Examination 1. At the time of the start of the test, the...

Intake air bypass system — checking and replacing the IAB valve diaphragm
General information Some models are equipped with an IAB system, which allows air drawn into the engine to be bypassed into the combustion chamber. The intake manifold on these models is equipped with two air channels,...

Controlled crankcase ventilation (PCV)
The PCV system is used to reduce the emission of hydrocarbon compounds into the atmosphere by removing crankcase gases. Purging is carried out by circulating fresh air coming from the air cleaner through the crankcase,...

Exhaust Gas Recirculation (EGR) System — Checking and Replacing Components
General information In order to reduce the emission of nitrogen oxides into the atmosphere, part of the exhaust gases is returned to the intake manifold through the EGR valve. This admixture of exhaust gases to the...

EVAP System — Component Check and Replacement
General information The system accumulates fuel vapors accumulated while the vehicle is parked and ensures that they are discharged into the intake manifold for combustion during normal engine operation. Any EVAP system...

Catalytic converter — condition check and replacement
Note. To avoid voiding your warranty on emission control system components, have the catalytic converter inspected and serviced at an auto repair shop. General information The catalytic converter is a component of...