Honda CR-V: Exhaust Emissions Controls
The exhaust emissions controls include three systems: PGM-FI, ignition timing control, and three way catalytic converter. These three systems work together to control the engine’s combustion and minimize the amount of HC, CO, and NOx that comes out the tailpipe. The exhaust emissions control systems are separate from the crankcase and evaporative emissions control systems.
PGM-FI System
The PGM-FI system uses sequential multiport fuel injection.
It has three subsystems: air intake, engine control, and fuel control. The powertrain control module (PCM) uses various sensors to determine how much air is going into the engine. It then controls how much fuel to inject under all operating conditions.
Ignition Timing Control System
This system constantly adjusts the ignition timing, reducing the amount of HC, CO, and NOx produced.
ThreeWay Catalytic Converter
The three way catalytic converter is in the exhaust system. Through chemical reactions, it converts HC, CO, and NOx in the engine’s exhaust to carbon dioxide (CO2), nitrogen (N2), and water vapor.
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Replacement Parts
The emissions control systems are
designed and certified to work together
in reducing emissions to
levels that comply with the Clean Air
Act. To make sure the emissions
remain low, you shoul
ThreeWay Catalytic Converter
The three way catalytic converter
contains precious metals that serve
as catalysts, promoting chemical
reactions to convert the exhaust
gasses without affecting the metals.
The catalytic conv
Emissions Testing
Testing of Readiness Codes
If you take your vehicle for an
emissions test shortly after the
battery has been disconnected or
gone dead, it may not pass the test.
This is because of certain ‘
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Block and Piston Inspection
1. Remove the crankshaft and pistons.
2. Check the piston for distortion or cracks.
3. Measure the piston diameter at a point 13 mm
(0.5 in.) from the bottom of the skirt. There are two
standard-size pistons (No Letter or A, and B). The
letter is stamped on the top of the piston. Letters
are also
Text Data Display Function
Each time you press the TITLE
button, the display mode shows you
in sequence, the folder name, the file
name, the artist name, the album
name, the song name, or name off
(which turns off the text display).
The display shows up to 16
characters of the selected data. If the
text data ha
