Fuel injection system (DOHC) of vehicle Honda Civic 5 and 6

Self-diagnosis procedure
The self-diagnosis procedure is discussed above on page 4-5. Only the self-diagnosis codes are different. Malfunctions *1: D15Z6 engine. O15Z7, D16Y5 (KQ model) *2: Engine D16Y5 (KG, KE): D15Z7, D16Y8, V15A4, V16A5 *3:...

Idle Speed Control System
Fast Idle Thermovalve (engine B16A5) Description To prevent idling as the engine warms up, the idle speed must be increased. The fast idle thermostat valve is controlled by a thermowax plunger. When the engine is cold,...

Fuel pressure
Pressure release Before disconnecting the fuel hoses and pipes, relieve pressure from the system by loosening the service bolt on the top of the fuel filter. Do not smoke while working on the fuel system. Keep open...

Injectors — checking and replacement
Note: Before starting the test, check the following: idle speed, fuel injection and CO ₂ at idle. If the engine is running: 1. With the engine idling, disconnect each injector connector individually and observe the idle...

FIRST Fuel Pressure Regulator
Examination Warning: Do not smoke during the inspection. Do not allow open flames in your work area. 1. Attach the special tool to the service port on the fuel filter. The pressure should be: engine D15Z6, D15Z7:...

Fuel filter
Replacement Warning: Do not smoke when working on the fuel system. Keep open flames away from your work area. When replacing the fuel filter, keep a safe distance between the battery terminals and tools. If the fuel...

Description of the exhaust gas toxicity reduction system
The emission control system includes a catalytic converter (TWC), an exhaust gas recirculation (EGR) system, a positive crankcase ventilation (PCV) system and an EVAP canister purge system (EVAP). *1 Models with...

Throttle body KART
Description The throttle bodies are a single chamber horizontal flow design (except for the D16Y7 engine) and vertical flow (engine D16Y7). The lower part of the throttle valve is heated by the engine cooler from the...

Emission Control System — Exhaust
Examination Do not smoke while performing this procedure. Keep open flames away from your work area. 1. Connect the tachometer. 2. Start the engine. Run it at 3000 rpm without load (A/T in [N] or [P], M/T in neutral)...

Three-way catalytic converter (TWC) (models with converter)
Description Three-way catalytic converter (TWC) is used to convert hydrocarbons (HC), carbon monoxide (CO) and nitrogen oxide (NOx) in the exhaust gas into carbon dioxide (CO₂), nitrogen (N₂) and water vapor. Inspection...

Crankcase ventilation system (PCV)
Description The ventilation system (PCV) is designed to prevent crankcase gases from entering the atmosphere. The PCV valve contains a spring-loaded plunger. When the engine is started, the plunger in the PCV valve...

Fuel Vapor Removal (EVAP)
Examination (engine D15Z7, D16Y6, B16A4, B16A5, B16A6) 1. Remove the fuel tank cap. 2. Start the engine and let it idle. 3. Disconnect the vacuum hose from the EVAP purge control valve and attach a vacuum gauge to the...

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Civic 8 (2005-2011)

Civic 7 (2000-2005)