As this Advance DEFI gauge does read vacuum, you will want to tee the boost gauge sender into your intake manifold. Now you will need to connect the boost source or “tee” your DEFI boost gauge into your intake manifold or charge pipe. If you have other DEFI ADVANCE gauges to install inline, now is the time to daisy chain them together. Plug the power harness into your DEFI Control Unit, and take the flying lead from your boost gauge and plug it into the correct port labeled “BOOST” on your control unit. We’ll be connecting that to the switched power for constant steady illumination in this How To Install DEFI Boost Gauge article. Lastly is the illumination light, which can be hooked up to a body wire if you want to be able to dim your gauges along with your dash. This plug is the one with the bolt through it you had to remove from the 2JZ ECU. Now you’ll be connecting the BLACK DEFI Control Unit wire to pin 4 on the 80 pin E9 plug. You must make sure this wire supplies constant power to the DEFI Control Unit, otherwise you’ll be spending a lot of time programming your gauges at every startup. The wire you want here is PIN 33 on the 40 pin E10 plug, shown below. This is so that your DEFI Control unit remembers the settings and peak warning values you’ve entered, no matter how many times you turn the car off. Next you need to connect the RED DEFI Control unit power wire to constant battery source. This IGN Switch is a switched power source that only turns on when you turn the key to the “ON” position. Next you will be taking the ORANGE DEFI control unit power wire, and connecting it to PIN 18 on the 40pin E10 plug. You will want to remove the E10 and E9 plugs from the main Powertrain Control Module by unscrewing the bolt in the middle of the E9 plug here. Pull back on the passenger side carpet area to expose the ECU panel, remove the 10mm nuts that hold this panel in place.
HOW TO INSTALL BOOST GAUGE KIT DRIVER
Open your driver side door and pull your seat back as far back as it can go to give you as much room around the ECU as possible.
HOW TO INSTALL BOOST GAUGE KIT HOW TO
We’ll be showing you how to tee the gauges into the MKIV power harness. Next you will be looking for switched power in the ignition harness, or tee into the ECU. If you have a stock radio, now would be a good time to locate your radio code.
To begin the wiring section of our How To Install DEFI Boost gauge guide, begin by disconnecting the negative terminal in your vehicle.
You’ll need to find the power harness in your DEFI control unit packaging, this is the four pronged connector that plugs into the “DC SOURCE” port on your Control Unit. The way this Control Unit works is that you supply power, ground, switched power and the illumination to this unit, which then powers each gauge in succession. The part number of this DEFI Advance Control Unit is DF07701 and we’ll be focusing on the wiring section of this unit first. Because this is the essential part of the gauge wiring, we’ll be addressing the wiring in the Control Unit section. You will require the a DEFI Advance Control Unit to control the BF Boost gauge we are installing.
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