This article is designed to help 2g owners identify all the plugs in the engine bay. The photos and wire colors were based off of a 1999 Eclipse GSX, so other years and models may vary in location and wire color.
I would like to give a HUGE thanks to turbosax2 for helping with the photography and the documentation for the article!!
The way the tech article will be set up will be as follows:
This post will have the master list of all the connectors. Each connector will then have it's own separate post below which will contain a little description and a few pictures and diagrams. The first picture will be an overview shot to show the general location of the plug. The plug will be circled in green. The next picture will show the plug itself. Following that will be a picture of the back of the plug to show how the wires are inserted into the plug as well as wire color. And lastly will be a diagram showing the arrangement/layout of the wires as well as the wire colors. These diagrams will always be viewed when looking at the back of the plug with the clip (the part that holds the plug in) on the top.
Wire Color Key
B = Black
Lg = Light green
Sb = Sky blue
V = Violet
O = Orange
Y = Yellow
Br = Brown
G = Green
Gr = Gray
L = Blue
P = Pink
R = Red
W = White
Here's an example on how to read the diagrams.
If you look at the picture, you'll notice there is 2 wires coming out the back of the connector. The diagram has 2 boxes that contain letters from the color code list above. The first box contains RSb. The first letter is the main wire color - red. The second letter (if applicable) deals with the stripe color, which in this case is sky blue as you can see in the picture. The second box contains a G for green. There is no stripe on this wire. These diagrams only deal with main wire color and stripe color. Some of the diagrams contain blank boxes which just means there is no wire there.
____________________________
Brian
Last edited by snowborder714; 07-14-2009 at 03:57 PM.
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The MDP sensor measures the amount of vacuum in the intake manifold. It does not do this to measure the amount of air entering the engine. The MDP sensor measurement is instead used to monitor that the exhaust gas recirculation (EGR) emissions control system is working correctly. 1G cars used a temperature probe for this, while 2G cars use the MDP sensor. (from Virtual Tour website)
This plug is held on by this little wire clip. Use a small pick or screw driver to pry the clip up. Once this is removed, then you can remove the plug.
____________________________
Brian
Last edited by snowborder714; 06-13-2008 at 11:03 AM.
The engine control module controls the two ignition power transistors to turn them alternately ON and OFF. This causes the primary currents in the ignition coils to be alternately interrupted and allowed to flow to fire the cylinders in the order 1-3-4-2.(from service manual)
____________________________
Brian
Last edited by snowborder714; 07-07-2008 at 09:05 AM.
The TPS is connected to the throttle plate inside the throttle body. It provides an electrical signal that "tells" the engine control computer the throttle position. The ECU uses this information to help "decide" how much fuel to inject in to the engine. (from Virtual Tour website)
*This plug also has the wire clip that holds it on (the same as the MDP sensor).*
This is a very important component of the engine, since it "tells" the engine computer how much air is entering the cylinders. The MAS actually consists of three different sensors: air flow, air temperature, and barometric (atmospheric) pressure. (from Virtual Tour website)
This solenoid allows the engine control computer to temporarily raise the fuel pressure for hot starting purposes. This is accomplished by cutting off the vacuum hose going to the fuel pressure regulator
It is not used for anything else, but it can provide a useful tap-in point for a boost gauge, since the regulator "sees" the intake manifold pressure. (from Virtual Tour website)
14. Exhaust Gas Recirculation (EGR) Control Solenoid
It controls the flow of exhaust gas through the exhaust gas recirculation valve - a valve that allows some exhaust gases to run back into the intake stream. This is purely for emissions purposes, as "reburning" some of the exhaust gas helps reduce emissions. (from Virtual Tour website)
2g Engine Bay Electrical Connections
