YH4
GRAND
VITARA
6E1-8 ENGINE AND EMISSION CONTROL SYSTEM (G16/J20 ENGINES)
1. Air cleaner
2. Mass air flow sensor (MAF sensor)
3. Air cleaner outlet hose
4. Throttle body
5. Throttle valve
6. Idle air control valve (IAC valve)
7. Intake manifold
8. Cylinder head
9. Exhaust manifold
10. Bypass air flow
11. Fresh air
12. Intake air temperature sensor
G16 ENGINE
J20 ENGINE
1. Air cleaner
2. Intake air temp. [IAT] sensor
3. Mass air flow [MAF] sensor
4. Resonator
5. Throttle body
6. Throttle valve
7. Idle air control [IAC] valve
8. Air cut valve
9. Intake manifold
10. Fuel delivery pipe
11. Engine
12. PCV valve
13. Fuel pressure regulator
14. Bypass air flow
15. PCV air flow
16. Engine coolant flow
17. EGR flow (if equipped)
18. EVAP purge flow
19. To brake booster
20. Fuel pressure control vacuum
Air
Exhaust gas
Fuel vapor
Engine coolant
The main components of the air intake system are air
cleaner, mass air flow sensor, air cleaner outlet hose,
throttle body, idle air control valve and intake man-
ifold.
The air (by the amount corresponding to the throttle
valve opening and engine speed) is filtered by the air
cleaner, passes through the throttle body, is distrib-
uted by the intake manifold and finally drawn into each
combustion chamber.
When the idle air control valve is opened according to
the signal from PCM (ECM), the air bypasses the
throttle valve through bypass passage and is finally
drawn into the intake manifold.
AIR INTAKE SYSTEM
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