Disable TPMS

[Larryjb]

I'm trying to disable my TPMS on a 2008 Explorer. I installed Forscan and am able to read all the AsBuilt codes, but I'm unable to decipher which one is for the TPMS. Has anyone been able to disable the TMPS?

 

[MotorCityFats13]

nope

 

[Larryjb]

I got one combination of values to work using Forscan. I'm reserving judgement for now, however.

 

[Larryjb]

So far, the first two digits in the binary display (not hex) seem to be for TPMS warning display in the 720-01-01 address. The next two digits seem to be to toggle the 4x4 and 4xr4 low indicators in the display. Note that to make the change, you would have to convert the binary into hex, download Forscan, and know what you are doing.

 

[Brahms]

Easier to buy new valve-stem sensors. I bought Autel MX-sensors, $25 each, and a programmer. Just did this, and all's well.

 

[Larryjb]

Easier to buy new valve-stem sensors. I bought Autel MX-sensors, $25 each, and a programmer. Just did this, and all's well.

Maybe for some. Your costs go into the hundreds of dollars just to tell me my tires have low pressure. For some people this will be the right and best thing to do.

For me it was easier and cheaper to disable the TPMS. $30 for the ELM-USB adapter, a little learning on my part to know how to program the IC module, and I no longer have to worry about the TPMS light.

 

[Brahms]

I understand, larryjb. But it's gonna be wife's car, and....
No, it wasn't hundreds. A local tire place gives me breaks, and barters with me. I bought and gave them the $119 tool, and they mount, balance, install and program. I don't have a tool sitting on my shelf collecting dust, and they make extra money. Works for me, YMMV.

 

[MotorCityFats13]

I like the sensors for that one time your tire is about to go total ape **** on you but if they don't tell you the pressure then I can deal with that stupid light but would still be interested in the solution but all you listed was atomic equations and missile codes

 

[Larryjb]

If you have an ELM with an HS/MS switch (you can buy these at Amazon), and you download and install Forscan and get the free 2 month license on a laptop, then you are pretty much set up hardware wise. I'm going to assume you know how to use Forscan, or can figure it out fairly easily. I can help later with that if necessary.

After connecting, you get access to the IC (instrument cluster) module codes. You should see a list of codes beginning with 720-xx-xx. The one you are interested in is 720-01-01. This address contains toggles for the 4x4 display, TPMS display, and more. I'm not sure what else, so you need to make sure you don't change any of the other numbers.

The confusing part of all this is that the codes you will be changing in Forscan are the HEX codes. You first need to run a HEX to BIN converter in your browser. Hex to Binary converter | number conversion will do nicely. This will give you the BIN information. You only need to run the HEX digits 5-8. You should get 16 zeros and ones. If you have 15 zeros and ones, that means that the first BIN number was a zero. The first two BIN digits are probably "01", turning TPMS warnings on.

Switch the BIN converter to BIN to HEX and type in the BIN code using "00" for those first two digits. Then copy the resulting HEX code into places 5-8 of the address 720-01-01.

Of course, you must be careful because if you mess up, you could be turning something on or off inadvertently.

Yes, it does look a little like atomic equations when you first look at all this. But, once you figure it out, it's not too bad. I have a post on Forscan forums that gives a little better detail, but I'm not sure that explorerforum would appreciate me posting a link to a different forum. (I've gotten in trouble on other forums for doing that.)

 

[Larryjb]

In my case:
The hex and bin for 720-01-01:
9505 7FFD
10010101 00000101 01111111 11111101
TPMS data to instrument cluster ON



My recent change on the 5th digit:
9505 3FFD
10010101 00000101 00111111 11111101
TPMS data to IC OFF

Depending you the options of your Explorer, the HEX and BIN is almost certainly different. It's even possible that the address location may be different for different years, so make sure you make a backup of the original codes, and make a copy of the 720 address HEX before your changes.

 

[Brahms]

Too much bourbon to understand this.....

 

[MotorCityFats13]

mine is"8905 68D0 EF" and my extended license ended today 3/9/19 but i think that only affects key programming

 

[Larryjb]

Too much bourbon to understand this.....

Or an excuse for one!

You have to be comfortable with programming, like the folks at Forscan. Otherwise, yeah, your solution' is better.

 

[Larryjb]

mine is"8905 68D0 EF" and my extended license ended today 3/9/19 but i think that only affects key programming

So your BIN for 68D0 is 0110100 011010000.

You could try changing the 68D0 to E8D0. Keep everything else the same. The last 2 digits EF you cannot change as they are calculated.

If this does not turn off your TPMS warning, that probably means it is in a different address location for your model year.

 

[MotorCityFats13]

So your BIN for 68D0 is 0110100 011010000.

You could try changing the 68D0 to E8D0. Keep everything else the same. The last 2 digits EF you cannot change as they are calculated.

If this does not turn off your TPMS warning, that probably means it is in a different address location for your model year.

Ill definitely give it a try and report back so you can add this to your findings and im almost positive sharing any links to the forscan forum would add to the help and be viewed as very helpful

 

[Larryjb]

Here's the link to the Forscan thread.

GEM module Ford Explorer Sport Trac 2007 - Page 2 - FORScan forum

 

[Larryjb]

Now I'm curious about the 4x4 codes. Positions 2 and 3 in the BIN (just after the TPMS). My 2 digits that control the 4×4 display on the instrument cluster are 11. The BIN digits in the same position of yours is 10.

Do you have AWD? 4×4 high and low?

 

[MotorCityFats13]

'no dice on those edits my replacement cluster came with the as built data of "8905 68C0 DF"lets give that one a try

I have the auto, high and low

and yes I had to extend the license to make the edits but $10 in the name of science

 

[fon440]

FYI. Swapped rims on my ‘09 ranger, no sensors. Now I don’t know how true it is but I asked Ford to shut off the dash light and they wouldn’t. Puts them “ on the hook” if something happens related to low tire pressure.

 

[Larryjb]

I seems that Ford has moved the address that toggles the TPMS warning from one position to another. It will be a slow and tedious process, but we can probably do this.

Starting with your original HEX of 8905 for 720-01-01 (BIN 10001001 00000101), we have to systematically change each set of zeros and ones to 00. Just make sure we don't lose track of what we are doing.
Mine is 10010101 00000101 HEX 9505
Starting with the HEX of 8905 (BIN 10001001 00000101), (note any changes you observe)
First trial: 00001001 00000101, HEX 0905
Second trail: 10000001 00000101, HEX 8105
third trial:10001000 00000101, HEX 8805
fourth trial: 10001001 00000001, HEX 8901
fifth trial: 10001001 00000100, HEX 8904

Then we work on the HEX 68D0: (BIN 01101000 11010000)
First trial: 00101000 11010000, HEX 28D0
second trial: 01001000 11010000, HEX 48D0 (This HEX is found in the ASBuilt for RWD. This is in the same BIN position that turned off my 4x4 indicator on the instrument cluster)
third trial: 01100000 11010000, HEX 60D0
fourth trial: 01101000 00010000, HEX 6810
fifth trial: 01101000 11000000, HEX 68C0 (This was the on in your ASBuilt data... This will be interesting to see what some one had turned OFF)