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Tech Edge WBO2 Install

First of all, I profess to know nothing about DSM's, but I have recently installed the Tech Edge WBO2 on my 1998 Eagle Talon Tsi Awd.  So, I thought it would be helpful if I explained exactly how I did it. The wire colors may vary from year to year and make to make, so please confirm all connections for your own application. Anyone with additional information, please feel free to add.

I ordered my WBO2 from Tech Edge in Australia. I ordered the Tech Edge 2.0A for 7057 with the 4 meter cable. This unit is - pre-built for use with the Bosch 0 258 007 057 WBO2 sensor. This sensor is used on many vehicles, so it is widely available. I ordered a WBO2 sensor from my local VW dealership. The 1999 Jetta 2.8l uses the exact sensor need for this install, part number 021-906-262-B. I told them I was from "____" Auto Repair so I got it for the shop cost of $30. Pretty cheap for replacements in the future. (I actually made up an auto repair shop with all of my personal information for the shop discount account. This works quite well. I have actually done these at several different dealerships and manufactures. Just remember that you want your "shop" to be taxed when they ask for a resale number.  Also, you want it for "will call," or they end up trying to deliver it to your address and will find out that you are not a real shop.)

I choose not to go with the additional display offered by Tech Edge. I didn't like the idea of another gauge cluttering up the dash and for all intended purposes DSMLink will record all of the data I need.

I installed the WBO2 in the following order. You can use what ever method best suits you.

1) RUNNING THE O2 SENSOR CABLE: I ran the cable from the engine compartment through the firewall in to the cab where I was going to mount the WBO2 unit. I started from the front of the vehicle with a few feet to spare for final connection. I zip-tie the cable along the A/C coolant line that run along the driver's side of the engine compartment. I then brought it down through the rubber boot surrounding the steering column into the passenger compartment. From there I feed it up behind the dash down the side of the center console and back to the large void behind the center console.

2) CONNECTING POWER: I tapped in for 12v power in the ignition switch harness at the steering column. I used the black and white striped wire. This wire only has power when the ignition is on.

3) CONNECTING GROUND: I made my ground connection at one of the 10mm bolts on the driver’s side of the center console.

4a) CONNECTING WBO2 TO DSMLINK USING REAR O2 SENSOR INPUT (*Preferred Method*): I used an old networking cable (RJ45) to connect the WBO2 to the ECU. (Throw away the cable TechEdge supplies with the WBO2 kit, it is only used to connect directly to a laptop.)  I first found what color wire was pin 1 (SVout) on the RJ45 cable. I then cut the cable in half and found that color of wire.   I then located the rear O2 sensor input on the ECU. Pin 75 on the ECU is the rear O2 sensor input. It is solid white. You can use the VFAQ on 2G ECU Pin outs to help you locate the correct wire. I then remove a 3/4“ section of insulation from the light green/black wire. I then solder the wire from the SVout (pin 1) on the RJ45 wire to the rear O2 sensor wire (pin 75; solid white). Wrap the solder with electrical tape. Run the RJ45 cable back to the WBO2 unit.

I choose not to cut the rear O2 sensor line for smog reasons. The rear o2 sensor must be connected and operational to pass smog. I simply unplugged the rear 02 sensor plug in side the passenger compartment along the drivers side of the center console.  It was easiest to remove the drivers seat to get at it.

*Using the rear O2 sensor input is my preferred method for connecting the WBO2 to the ECU for logging purposes.  The MDP sensor input should be left for logging boost, as the "fake MAF" and "use MPD" features in DSMLink only use the MDP sensor as there source for boost pressure when running DSMLink's "quasi MAP" feature at higher airflow readings.  The "quasi MAP" is very useful when overrunning the stock MAS and essential for accuracy if your boost source fluctuates after the switch over Hz.

4b) CONNECTING WBO2 TO DSMLINK USING MDP INPUT (Alternate Method): As described in 4a, use a RJ45 cable to connect the WBO2 to the ECU.  I then located the MDP input on the ECU. Pin 73 on the ECU is the MPD sensor input. It is light green with a black stripe. You can use the VFAQ on 2G ECU Pin outs to help you locate the correct wire. I then remove a 3/4“ section of insulation from the light green/black wire. I then solder the wire from the SVout (pin 1) on the RJ45 wire to the MDP sensor wire (pin 73; light green/black). Wrap the solder with electrical tape. Run the RJ45 cable back to the WBO2 unit.

I choose not to cut the MDP sensor line for smog reasons. The MDP sensor must be connected and operational to pass smog. I simply unplugged the MDP sensor plug in the engine compartment. The MDP sensor is the only sensor located on top of the intake manifold.

5) CHECK OPERATION: Check that you have power to the WBO2 unit. This is very important, because you SHOULD NEVER run the heated O2 sensors in the downpipe without power. So make sure the WBO2 unit powers up and that you have the cable run to the location that your O2 sensor is to be installed.

6) INSTALL THE O2 SENSOR: I had a local muffler shop weld on a second O2 bung on the downpipe for $20. Tech Edge has some very specific O2 sensor location installation instructions. I personally followed all of these except the vertical position. For convenience of install I have mine at 9 o’clock horizontal position right below the stock O2 housing.

7) PLUG-IN O2 SENSOR: I plugged in the O2 sensor before they took my car off of the lift. Remember, the sensor must have power so it does not get fowled.

8) UNPLUG MDP SENSOR: If you choose to tap into the MDP sensor line and not cut it, you must now unplug the sensor. I also selected in DSMLink under DTC to ignore engine codes related to the EGR/MDP sensors.

9) CAPTURE WBO2 VALUE: I selected WBO2 as one of my “captured values” in the ECU menu. I then choose WBO2 as one of the “values” displayed in the display menu.

10) CONGRATULATIONS, YOUR DONE: At this point you should be logging your new Tech Edge WBO2 sensor. . . Happy Tuning!!!
 

Pins on RJ45 Cable.

2G ECU Pin outs


 

Tech Edge WBO2 sensor installed on driver side of the center console.

Various sensor cables run from the engine compartment through the steering column rubber boot.

WBO2 Sensor cable run along the AC coolant line.

O2 sensor installed in new bung welded in the downpipe.