First off, check out http://forums.maxima.org/showthread....hreadid=198305 to see if you qualify to get the ECU update I told you about awhile back.

Secondly, I was thumbing through the ESM today and found out how you can use a 2000-2001 MAF sensor, and get rid of the SES light too. If you insert a 2k ohm resistor between pins 3 (Black) and 5 (Yellow/Black) of the MAF's electrical connector, then the ECU will see that the outside air is just a little bit higher than 68°F. The lower the resistor value, the warmer the "air" is. Don't use a resistor less than 500 ohms, or else you'll be up around 160°F.

Depending on where you live, use a "best-guess" judgement and pick a resistor between 500 ohms and 2000 ohms. Stay toward the higher side if you live in a colder region, and towards the lower side if you live in a warmer region.

Note: I have not personally tried this, nor am I planning to. This is basically for people like emax95, and others who didn't want to pay $300+ for a 2002-2003 MAF. Use this as your own test. I'm not responsible for any damage done to your car.

 

How do you find this stuff studman? You are amazing.

 

*bump* for the people who didnt know.

 

In order to bypass the IAT, measure your intake temperature under normal operating procedures. Then use the chart below to choose the correct resistor values. You may have to use multiple resistors (in series) in order to achieve the correct resistance.

This has not yet been tested, but the calculations are correct according to the math. I have figured out the formula to use for calculating what resistor value to use:

At 2000 ohms, the ECU reads that the Intake Air Temperature (IAT) is 68 degrees.

For every ADDITIONAL 1 Farenheit degree warmer, reduce the ohms by 16.66 and drop the decimal places. Here's a chart that should help:

For 68 degrees, you need to use a 2000 ohm resistor.
For 69 degrees, you need to use a 1983 ohm resistor.
For 70 degrees, you need to use a 1967 ohm resistor.
For 71 degrees, you need to use a 1950 ohm resistor.
For 72 degrees, you need to use a 1933 ohm resistor.
For 73 degrees, you need to use a 1917 ohm resistor.
For 74 degrees, you need to use a 1900 ohm resistor.
For 75 degrees, you need to use a 1883 ohm resistor.
For 76 degrees, you need to use a 1867 ohm resistor.
For 77 degrees, you need to use a 1850 ohm resistor.
For 78 degrees, you need to use a 1833 ohm resistor.
For 79 degrees, you need to use a 1817 ohm resistor.
For 80 degrees, you need to use a 1800 ohm resistor.
For 81 degrees, you need to use a 1783 ohm resistor.
For 82 degrees, you need to use a 1767 ohm resistor.
For 83 degrees, you need to use a 1750 ohm resistor.
For 84 degrees, you need to use a 1733 ohm resistor.
For 85 degrees, you need to use a 1717 ohm resistor.
For 86 degrees, you need to use a 1700 ohm resistor.
For 87 degrees, you need to use a 1683 ohm resistor.
For 88 degrees, you need to use a 1667 ohm resistor.
For 89 degrees, you need to use a 1650 ohm resistor.
For 90 degrees, you need to use a 1633 ohm resistor.
For 91 degrees, you need to use a 1617 ohm resistor.
For 92 degrees, you need to use a 1600 ohm resistor.
For 93 degrees, you need to use a 1584 ohm resistor.
For 94 degrees, you need to use a 1567 ohm resistor.
For 95 degrees, you need to use a 1550 ohm resistor.
For 96 degrees, you need to use a 1534 ohm resistor.
For 97 degrees, you need to use a 1517 ohm resistor.
For 98 degrees, you need to use a 1500 ohm resistor.
For 99 degrees, you need to use a 1484 ohm resistor.
For 100 degrees, you need to use a 1467 ohm resistor.
For 101 degrees, you need to use a 1450 ohm resistor.
For 102 degrees, you need to use a 1434 ohm resistor.
For 103 degrees, you need to use a 1417 ohm resistor.
For 104 degrees, you need to use a 1400 ohm resistor.
For 105 degrees, you need to use a 1384 ohm resistor.
For 106 degrees, you need to use a 1367 ohm resistor.
For 107 degrees, you need to use a 1350 ohm resistor.
For 108 degrees, you need to use a 1334 ohm resistor.
For 109 degrees, you need to use a 1317 ohm resistor.
For 110 degrees, you need to use a 1300 ohm resistor.

 

I am going to try it today. Because in Houston Texas, we have to pass an emissions test and I will fail because of my SES light being on.

 

So as the temperature changes you have to change the resistor????
You mean if You drive from a temperature of 70º to a temperature of 71º the SES light will be on????

 

No. I just posted the values up for the resistor. Choose the AVERAGE temperature for your area, and use that resistor.

It's more for those in different regions. If you live in FL like me, our average summer temp is in the 90s. But for those people in AZ, it's in the 100s. For those people in Maine, it's more like upper 70s. You wouldn't want to drive a car that's "reading" 100 degrees when it's really only averaging about 70 degrees.