Intake Air System Diagram; Idle Control System Diagram - Honda 2002 Accord Manual

Fuel and Emissions Systems
System Descriptions (cont'd)
Intake Air System Diagram
This system supplies air for engine needs. A resonator in the air intake duct provides additional silencing as air is
drawn into the system.
T H R O T T L E
A | R
C L E A N E R E L E M E N T
B L K
B L K /
B L U
- R E S O N A T O R
E C M / P C M
/ L
F r o m
P G M - F I
M A I N
R E L A Y
V A R I O U S
S E N S O R S
B L K
_ L
Idle Control System Diagram
The idle speed of the engine is controlled by the Idle Air Control (IAC) valve:
• After the engine starts, the IAC valve opens for a certain time. The amount of air is increased to raise the idle speed
by about 1 5 0 - 3 0 0 rpm.
• When the engine coolant temperature is low, the IAC valve is opened to obtain the proper fast idle speed. The
amount of bypassed air is thus controlled in relation to engine coolant temperature.
F r o m
P G M - F I
M A I N
R E L A Y
B L K
11-30