Car engine management system Honda Accord 6

Engine Management System Specifications and Description
General parameters I-probe voltage, V When the circuit is open 0.1÷0.2 With a closed circuit 0.1÷0.9 Crankshaft Position/TDC Sensor Resistance (CKP/TDC), Ohm 1850÷2450 Resistance of the piston position sensor (CYP), Ohm...

On-Board Diagnostics (OBD) System — Operating Principle and Error Codes
Information about diagnostic devices The proper functioning of injection system components and exhaust gas toxicity reduction systems is checked using a universal digital meter (multimeter). Using a digital meter is...

Removal and installation of PCM/ECM
Warning! The models of vehicles covered in this manual are equipped with a supplemental restraint system (SRS). Before performing any work near the air bag unit, steering column or instrument panel, turn off the SRS to...

Checking the condition and replacing the throttle position sensor (TPS)
Examination 1. The TPS is mounted on the throttle body and connected to the throttle shaft. Based on the analysis of signals received from the TPS, the PCM determines the exact current position of the throttle,...

Checking the condition and replacing the absolute pressure sensor in the pipeline (MAP)
Examination 1. The MAP sensor monitors variations in the depth of vacuum in the intake manifold associated with changes in crankshaft speed and current engine load, and converts the received information into an...

Checking the condition and replacing the intake air temperature (IAT) sensor
Examination 1. The IAT sensor is a thermistor (a resistor whose resistance depends on temperature). A change in resistance causes a change in the amplitude of the sensor signal voltage, and the HIGHER the temperature,...

Checking the condition and replacing the engine coolant temperature sensor (ECT)
Examination 1. The ECT sensor is a thermistor (a resistor whose resistance changes with temperature). Changing the sensor's resistance has a direct effect on the amplitude of the signal it sends to the PCM. At the same...

Checking the condition and replacing the TDC/Crankshaft Position (TDC/CKP) sensor
Examination 1. The crankshaft position sensor (CKP) is used to determine the injection and ignition timing of fuel in each of the engine cylinders. The TDC sensor is used to determine the ignition timing at the moment...

Checking the condition and replacing the piston position sensor (CYP)
Examination 1. The CYP sensor is used to determine the current position of the pistons. The information it provides is used to determine the fuel injection sequence. The sensor is built into the ignition distributor...

Checking the condition and replacing the electrical load detector (ELD)
Examination 1. The ELD system detects signs of overload of the electrical circuits of the external lighting and signaling devices, fuel injection, charging, etc. The first symptom of such overloads is a violation of the...

Checking the condition and replacing the pressure switch in the power steering system (PSP)
Examination 1. The PSP switch is included in the hydraulic line of the power steering system in the section between the steering pump and the rack and pinion housing. When the steering wheel is turned sharply (for...

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

Checking the condition and replacing the knock sensor
Knock sensors respond to increased engine vibrations, usually caused by detonation of the air-fuel mixture. Based on the information received from the sensor, the PCM adjusts the ignition timing, trying to maintain it...

Checking the condition and replacing the vehicle speed sensor (VSS)
The VSS is mounted on the transmission case 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 sent...

Checking the serviceability and replacing the idle speed control valve (IAC)
General information When the engine is idling, the air-fuel mixture is controlled by the idle speed stabilization valve (IAC). The IAC valve is activated by the PCM, depending on the current engine load (air...

Checking and replacing the air valve for adjusting the air-fuel mixture (FIA)
Examination 1. The system under consideration supplies purified air to the injection injectors during engine operation. The supply of additional air allows for the depletion of the air-fuel mixture and ensures its more...

Controlled Crankcase Ventilation (PCV) System
The PCV system (see accompanying illustration) serves to reduce the emission of hydrocarbon compounds into the atmosphere by removing crankcase gases from the engine. The block is purged by passing fresh air from the...

Exhaust Gas Recirculation (EGR) System — General Information and Testing
General information In order to reduce the emission of nitrogen oxides into the atmosphere, the engine design provides for the removal of part of the exhaust gases into the intake manifold through the EGR valve. Such...

Evaporative Emissions (EVAP) System — General Information, Testing, and Replacement
General information The system accumulates fuel vapors that accumulate in the fuel system while the vehicle is parked and ensures that they are discharged into the intake manifold for combustion during normal engine...

Catalytic Converter — General Information, Checking and Replacement
Note: To avoid voiding the warranty on emission control system components, have the catalytic converter inspected and serviced by an authorized vehicle service center. General information A catalytic converter is a...

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