This article will show how I installed a PLX M-200 wideband O2 sensor in my 2g eclipse. This particular model does not have a display because I chose to just use DSMLINK to view the values of the wideband.
Basic Tools needed:
1. Dremel type tool w/ cut off wheel
2. Welder or someone that can weld for you
3. Adjustable wrench
4. Wire strippers
5. Shrink wrap and electrical tape
6. Solder iron
7. Air compressor with impact wrench (makes this a lot easier.)
8. Weld on O2 sensor bung
First off disconnect the battery. I decided to use my MDP sensor input as the wideband input to the ECU. There are a few different inputs that you can use (front or rear O2), it just depends on your preference. I wanted to keep both the inputs for the stock O2's so thats why I chose the MDP sensor. On a 2g the MDP sensor is located on the top of the intake manifold. For the exact location you may use this link: http://members.shaw.ca/dsm.1000q/Engineprimer/2G/mdp.htm or you can also check your repair manual.
Now you have to make sure this wire is not connected to the ECU or the WBO2 will not function correctly. You must make sure the ECU is only trying to read one signal into the input on the connector leading to the ECU. I simply cut the wires a few inches down from the sensor itself and capped them off.
The next step is taking the downpipe off of the car. There should be two bolts holding the downpipe to the O2 housing and two more bolts connecting the downpipe to the catalytic converter (unless the catalytic converter is welded on). Remove these bolts and remove the downpipe from the car.
Now you want to determine where to weld the new O2 sensor on. In the instruction manual it states you want to place the O2 sensor at least 18-24 inches away from the turbo to avoid premature failure of the unit (too much heat from turbo). I simply got a measuring tape and marked about 24 in. from the top of the downpipe. (Picture 1).
This is where you want to get your dremel type tool and cut off disc out. You will need to pick up a new O2 sensor bung from any muffler shop or auto parts store, mine was about $5.00. Trace an outline of the O2 sensor bung onto the downpipe, and then cut out a new hole. Test fit new O2 sensor bung and make any adjustments necessary to make sure it's a good fit. Once everything's how you want it spot weld the new bung onto the downpipe.
Now that the bung is spot welded, go around the bung and weld a good bead around it to make sure there are no leaks. (Picture 2). Once the bung is placed and welded where you want it connect the O2 sensor to the downpipe and reconnect the downpipe to the car. (Picture 3). Run the wire and connector into the passenger compartment of the car through the firewall. I zip tied the wire to the firewall to keep it away from as much heat as possible and ran it through the firewall hole underneath the battery tray. Pull the wire through the hole to where you want the wideband display box. I chose to put the display box in the glove compartment to keep it out of sight. Connect the display box to the O2 sensor wire. (Picture 4).
Now for the wiring part. On this particular unit there are four wires coming out of the display box. Red (12v power), Red/Black (ground), White (wideband sensor wire), and grey (narrowband sensor wire). I only chose to use the white wire because I don't really need the values for the narrowband sensor. Run the Red wire to any switchable
12v power wire. I chose the cigarette lighter (quick and easy to find). Cut and strip the cigarette lighter power wire, put heat shrink wrap on and solder the red power wire to it. Next take the red/black ground wire and attatch it to a good ground. (Picture 5).
Disconnect the connectors to the ECU and find the MDP sensor wire. ECU diagrams can be found at www.vfaq.com ,or in the service manuals, it should be a light green wire (pin 73, 2G) on the ECU. Cut the wire from the connector about 2-3 inches out. Solder in the white wire from the wideband unit and heat shrink the connection. (Refer to picture 5).
You're almost done, the last step is to strip a small strip from the ground wire (from wideband unit) and solder it to one end of the capacitor included in the kit. Solder the other end of the capacitor to the white wire leading into the ECU. (Refer to picture 5).
That's it you're done. Reconnect battery, reconnect wiring harness to ECU, tuck everything away and start the car. For this to properly work with DSMLINK, go into values>PLXWB>choose input, in this case MDP sensor and start logging.
Again, this is simply the way I connected my WBO2 according to the instructions included with the unit; based on your particular setup they're may be slightly different steps. I am not responsible for any damage done to vehicle or person in attempting this modification. Do this modification at your own risk.
Basic Tools needed:
1. Dremel type tool w/ cut off wheel
2. Welder or someone that can weld for you
3. Adjustable wrench
4. Wire strippers
5. Shrink wrap and electrical tape
6. Solder iron
7. Air compressor with impact wrench (makes this a lot easier.)
8. Weld on O2 sensor bung
First off disconnect the battery. I decided to use my MDP sensor input as the wideband input to the ECU. There are a few different inputs that you can use (front or rear O2), it just depends on your preference. I wanted to keep both the inputs for the stock O2's so thats why I chose the MDP sensor. On a 2g the MDP sensor is located on the top of the intake manifold. For the exact location you may use this link: http://members.shaw.ca/dsm.1000q/Engineprimer/2G/mdp.htm or you can also check your repair manual.
Now you have to make sure this wire is not connected to the ECU or the WBO2 will not function correctly. You must make sure the ECU is only trying to read one signal into the input on the connector leading to the ECU. I simply cut the wires a few inches down from the sensor itself and capped them off.
The next step is taking the downpipe off of the car. There should be two bolts holding the downpipe to the O2 housing and two more bolts connecting the downpipe to the catalytic converter (unless the catalytic converter is welded on). Remove these bolts and remove the downpipe from the car.
Now you want to determine where to weld the new O2 sensor on. In the instruction manual it states you want to place the O2 sensor at least 18-24 inches away from the turbo to avoid premature failure of the unit (too much heat from turbo). I simply got a measuring tape and marked about 24 in. from the top of the downpipe. (Picture 1).
This is where you want to get your dremel type tool and cut off disc out. You will need to pick up a new O2 sensor bung from any muffler shop or auto parts store, mine was about $5.00. Trace an outline of the O2 sensor bung onto the downpipe, and then cut out a new hole. Test fit new O2 sensor bung and make any adjustments necessary to make sure it's a good fit. Once everything's how you want it spot weld the new bung onto the downpipe.
Now that the bung is spot welded, go around the bung and weld a good bead around it to make sure there are no leaks. (Picture 2). Once the bung is placed and welded where you want it connect the O2 sensor to the downpipe and reconnect the downpipe to the car. (Picture 3). Run the wire and connector into the passenger compartment of the car through the firewall. I zip tied the wire to the firewall to keep it away from as much heat as possible and ran it through the firewall hole underneath the battery tray. Pull the wire through the hole to where you want the wideband display box. I chose to put the display box in the glove compartment to keep it out of sight. Connect the display box to the O2 sensor wire. (Picture 4).
Now for the wiring part. On this particular unit there are four wires coming out of the display box. Red (12v power), Red/Black (ground), White (wideband sensor wire), and grey (narrowband sensor wire). I only chose to use the white wire because I don't really need the values for the narrowband sensor. Run the Red wire to any switchable
12v power wire. I chose the cigarette lighter (quick and easy to find). Cut and strip the cigarette lighter power wire, put heat shrink wrap on and solder the red power wire to it. Next take the red/black ground wire and attatch it to a good ground. (Picture 5).
Disconnect the connectors to the ECU and find the MDP sensor wire. ECU diagrams can be found at www.vfaq.com ,or in the service manuals, it should be a light green wire (pin 73, 2G) on the ECU. Cut the wire from the connector about 2-3 inches out. Solder in the white wire from the wideband unit and heat shrink the connection. (Refer to picture 5).
You're almost done, the last step is to strip a small strip from the ground wire (from wideband unit) and solder it to one end of the capacitor included in the kit. Solder the other end of the capacitor to the white wire leading into the ECU. (Refer to picture 5).
That's it you're done. Reconnect battery, reconnect wiring harness to ECU, tuck everything away and start the car. For this to properly work with DSMLINK, go into values>PLXWB>choose input, in this case MDP sensor and start logging.
Again, this is simply the way I connected my WBO2 according to the instructions included with the unit; based on your particular setup they're may be slightly different steps. I am not responsible for any damage done to vehicle or person in attempting this modification. Do this modification at your own risk.
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