Picture taken thru the glove box door opening.
Signal wire to the analog input block (Analog Input #2).īe sure all wiring connections are taped up so nothing can shortīelow is a picture showing where I mounted the analog inputīlock that is connected to the PL by the gray cable coming out of the top of theīlock. The red wire hanging out of the dash is the wire from the green Go here if you need an ECM wiring diagram. To the TPS, and, it makes a good source for the MAP. C14 is the wire that supplies an accurate 5.0 reference voltage This white wire extension is tee'd into the gray wire coming from C14 of the ECMĬonnector. White wire beneath the length of unshrunk heat shrink. Shown emerging from the bottom of the dash and has been extended with a piece of In the picture below, the gray wire with the black stripe is The dash and is shown in the next picture. The other end that goes under the hood has been pulled down below Shown below is the part that goes back to the dash cluster. The wire that brings the 5.0 signal from the dash-except it is seldom veryĪccurate as noted above. Getting a more accurate voltage) Now, locate the gray wire with the black stripe. The sensor to also make sure it is a good ground. Measured voltage on the gray wire at the sensor is very close to 5.0v, then theīoost readings should be very close. I believe that a two bar sensor will read 2.4-2.5v in theĢ) (The following is not necessarily required. It should drop about 0.1vįor each 2000 ft of altitude. The higher the altitude, the less the voltage. At sea level, you should see approximately 1.6 volts. Wire.Check the voltage in the wire with the key in RUN position, but, with In order to be sure that you picked the correct green LED gauge will still work.particularly if you use the rebuilt boost gauge and Note that the green wire does not need to be cut, and, the Some quality wire taps, you could use them to make the Tee connection rather Then you will see the red wire I soldered to the green wire. If you look at the picture and see the black tape, It is the signal wire coming from the MAP and going to the LED boost gauge. Now, to begin connecting the MAP to the Power Logger Analogġ) Locate the the light green wire in the wiring bundle. The wiring goes into the engine compartment. Hidden between the hvac ducting and the inner fender. The lower end goes to a connector that is somewhat The bundle loops back above the glovebox opening and goes to the Is pulled out slightly in the picture for better access. In order to connect the MAP to the Power Logger and get the mostġ) Empty the glovebox and drop the door all the way down byĭepressing the retaining clip while pulling the door all the way down.Ģ) Locate the wiring bundle shown in the picture below. This made the reported boost number higher than it should be. The theoretical 4.96-5.04 volts which seems to be normal from my experience.
Volt reference signal measured 5.13 volts at the gray wire at the MAP instead of The following pictures come from one of my cars where the 5.0 If you are working on a car with a digital dash, it will probably be easier to connect the map to the tps 5.0v and ground wires and then run a wire into the car from the map output (green wire) to the analog input block of the PL. If this reference voltage is not very close to 5.0 volts, then the boost numbersĭigital Dash cars do not normally have the wires in the harness under the dash as they did not use a map sensor. Its 5.0 volt reference signal from the instrument panel rather than from the ECM. This may not provide an accurate boost number as the MAP receives The MAP output signal wire under the dash and connect it to the analog inputīlock. In it's most simple form, all that is required is to "tee" into If you wish to measure more than 15 psi of boost accurately, then you need toĮxchange the original two bar sensor for a three bar unit which will give us an Power Logger as it cannot be sourced directly from the ECM. Therefore, it must be wired into the analog input block of the Regard to regulating fuel or spark, but, simply serves to feed the factory boost On these cars, the MAP sensor does nothing with The analog dash cars come with an LED boost gauge and a two bar One of the really useful features is theĪbility to log Boost, EGT, Wideband 02, and other items such as fuel pressure IF Bob Bailey's Power Logger is a major step forward in data
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