• Register Today It's free! This box and some ads will disappear once registered!

Introdcution: EEC-V Computer


Moderator Emeritus
January 26, 2004
Reaction score
City, State
Mechanicsville, Virginia
Year, Model & Trim Level
2004 Acura TL

EEC-V Computer System

EEC-V has been out for awhile now (since 1996). It is, however, a little hard to understand it and the differences between EEC-IV and EEC-V.

What It Controls:

The computer will control fuel injection, ignition timing, monitors exhaust gases, as well as sometimes controling the Automatic Transmission. Within these controls are features to meet OBD-II regulations by the government.

Sensors and What Not:


The way the computer can take control is by knowing what exactly is going on with the engine. EEC-V added more sensors; ambient air temperature, engine temperature, airflow, engine load, and vehicle speed (usually for ABS and Speedo operation). These are just some of the sensors added. After the mixture in the combustion chamber being ignited and burned, sensors will measure the oxygen content before and after the catalyst converter to make sure everything is proper (14.1:1 fuel:air mixure, oxygen content). There are also sensors to disengage and engage the EGR system for better emissions.

The Vitals:

Important information for the computer(s) are the following: Crankshaft Position Sensor (CKP Sensor), Camshaft Position Sensor (CMP). If these sensors are not sending the correct signal that the computer needs to see you can have a whole heep of trouble. I consider these the vitals because every computer system on engines need to know where #1 cylinder is and what valves are open.


There are plenty of other sensors for the computer to read. Such as: Power Steering Pressure Switch, Evaporative Emission Canister Purge Valve, Exhaust Gas Vacuum Regulator, Heated Oxygen Sensor (Pre Catalyst & Post Catalyst), Vehicle Speed Sensor, Idle Air Control Valve, Intake Air Temperature sensor, Mass Air Flow sensor, Throttle Position Sensor (TPS) and a few other various sensors.

More Information:


Above is a link to another write up by me, Sparky2263, and Glacier991. Great information if you are up for the reading.


Above is another link for OBD-II trouble codes. Just basic information on codes, how to read them, etc. Click here to learn about Scanners