DIY - Bypassing Tire Pressure Warning System (TPWS / TPMS)

[bewley]

Of course they aren't necessary and I understand the purpose for the thread. But I would imagine that my information might benefit a few people who might be reading this thread because they think reprogramming when swapping will be costly... since it is costly if you reprogram at a dealership.

[jimmykicker]

Hey guys. I have a 2009 Scion (toyota) xb. I have had this light annyoying the bejesus out of me for 2 years....in fact since I bought it. I think the dealer didn't bother putting them back in when they installed new tires when I purchased it. Seeing the dealer was 150 miles from where I bought it, I just left the light on. Question is, does anybody know if this fix will work on my car too? Are the wires the same? Is it in the same relative location? I can't find any info on where the box is in my car. Any info is appreciated. Hate to hijack the forum as I don't own a Yaris, but this is great information and looks super easy. Thanks.

[CTScott]

Originally Posted by jimmykicker

Hey guys. I have a 2009 Scion (toyota) xb. I have had this light annyoying the bejesus out of me for 2 years....in fact since I bought it. I think the dealer didn't bother putting them back in when they installed new tires when I purchased it. Seeing the dealer was 150 miles from where I bought it, I just left the light on. Question is, does anybody know if this fix will work on my car too? Are the wires the same? Is it in the same relative location? I can't find any info on where the box is in my car. Any info is appreciated. Hate to hijack the forum as I don't own a Yaris, but this is great information and looks super easy. Thanks.

Looking at the EPC, the part number for your TPMS ECU is unique to the 07+ XB (89769-12030). I only have the 06 XB service manual, and since the TPMS wasn't added until 07, it's not covered. If you can track down the TPMS section of the service manual or at least the instrument cluster electrical wiring diagram, then I can tell you if this method will work. As far as location goes, the EPC shows a very poor representation of the location, but I think it is showing it as being behind the lower part of the C-pillar cover.

[jimmykicker]

Originally Posted by CTScott

Looking at the EPC, the part number for your TPMS ECU is unique to the 07+ XB (89769-12030). I only have the 06 XB service manual, and since the TPMS wasn't added until 07, it's not covered. If you can track down the TPMS section of the service manual or at least the instrument cluster electrical wiring diagram, then I can tell you if this method will work. As far as location goes, the EPC shows a very poor representation of the location, but I think it is showing it as being behind the lower part of the C-pillar cover.

Now I am a bit confused about that. There was no 2007 Scion xb. 2006 models ran late, and they didn't introduce the new style to 2008.

Let me see what I can find out about the wiring diagram. Shouldn't be too hard to come up with. I'l probably just buy a service manual. It's the only car I have never bought one for. Thanks.

J

[CTScott]

Originally Posted by jimmykicker

Now I am a bit confused about that. There was no 2007 Scion xb. 2006 models ran late, and they didn't introduce the new style to 2008.

Let me see what I can find out about the wiring diagram. Shouldn't be too hard to come up with. I'l probably just buy a service manual. It's the only car I have never bought one for. Thanks.

J

In the EPC I was looking at build date, so the 2007's were really 2008's for the US.

[CrankyOldMan]

I had forgotten about having done this mod, until the light came on last week. Of course, I should have expected it since my winter tires don't have TPMS stems, but it still took me by surprise. Strangely enough, all I could think of when it came on, was of an anthropomorphic Yaris screaming, "I can't feel my tires! AAAAUGH!"

[jimmykicker]

Ah...gotcha. I will see what I can do. Thanks!

[carlisle737]

Hi Guys, I'm hoping this thread is still alive. I need to bypass the tpms for my 2008 4Runner and my wire colors are really different than what's been described. My hot lead is black with a red stripe. My red (with a yellow stripe) is 12v and I have 2 pinks, one with a black stripe and the other with a yellow stripe. I've attached the photos to see if anyone else has run into this tpms harness where every wire has a stripe of some sort. Any help is deciphering this wire mess will be greatly appreciated.

Thanks.

[yarisugi]

^first post LOL.

[CTScott]

Originally Posted by carlisle737

Hi Guys, I'm hoping this thread is still alive. I need to bypass the tpms for my 2008 4Runner and my wire colors are really different than what's been described. My hot lead is black with a red stripe. My red (with a yellow stripe) is 12v and I have 2 pinks, one with a black stripe and the other with a yellow stripe. I've attached the photos to see if anyone else has run into this tpms harness where every wire has a stripe of some sort. Any help is deciphering this wire mess will be greatly appreciated.

Thanks.

The wire colors are different and the TPMS ECU has a different part number, that is unique to the 4Runner, so I would need to see the wiring diagrams for the 4Runner to be able to tell you if the procedure is the same.

[yarisugi]

Don't know if 2004 is same as 2008.
Does this help, CTScott?

[CTScott]

Originally Posted by yarisugi

Don't know if 2004 is same as 2008.
Does this help, CTScott?

Different - That one has 16 pins whereas the 2008 has 12.

[carlisle737]

Any suggestions on the best site to buy the wiring diagrams from?

[yarisugi]

aw crap. oh well. Thought you had the EPC for all the Toyotas. hehe.

After Googling I came across this link.
Some member said it worked on their 2007 4Runner, is 2007 and 2008 different?

@carlisle737 - trade in your 4Runner for a Yaris.

[CTScott]

Originally Posted by yarisugi

aw crap. oh well. Thought you had the EPC for all the Toyotas. hehe.

After Googling I came across this link.
Some member said it worked on their 2007 4Runner, is 2007 and 2008 different?

@carlisle737 - trade in your 4Runner for a Yaris.

08 is different, as that 07 diagram still shows a 16 pin connector.

There are a bunch of ebay vendors that sell copies of the Toyota service manuals for about $10.

[carlisle737]

I've seen so many posts for the 4runner bypass, but every post has the wiring you guys describe for the Yaris (and pretty much every other Toyota). I think Toyota decided to use all there spare wire stock in the 08 4runner. This vehicle has thrown me more curves that I can swing at.

But I have a feeling a Yaris couldn't pull my boat, so I'll have to make due.

Thanks for the comments though. I once again have hope that the light will go away.

[BobGood]

Thanks, CTScott, for providing the bypass of the TPWS system on my 2008 Yaris. The lights out now. I had damaged my TPMS valve stem so I ordered one off of Ebay with the exact same serial number as my old one but once I had it installed at a local tire place the light remained on. I called the Service Dept for the closest Toyota dealership near me (an hour and half away from where I live) and was informed that the TPMS needed registering with the TPMS ECM which would cost me $90.00. Then I read in this thread that the battery in the TPMS would give out after 7 years or so and would then need to be replaced ($130.00 x 4 + $90.00 equals quite a bit of money). I then decided to try your suggestion in post #115 and it worked...and simple to do as well.

So, thanks again. :).

BTW, I registered here just so I could thank you.

Best regards,

Bob

[dave van muyden]

I tried this but by accident grounded the red wire now abs light on no powersteering and speedo doesnt work