Warning lights

[Grypen]

Has anyone taken the dash apart behind where the warning lights are located. I wanted to remove an annoying light from there (tire pressure warning).

[jelloslug]

Why would you want do do that? Just reset the warning light.

[David Beale]

Most of the lights are LEDs soldered onto the dash PCB.

If he has replaced the stock wheels or damaged/destroyed the senders the light can be annoying. Perhaps a piece of black electrical tape?

If the light is on and you still have the stock senders on the car, inflate the tires to your desired pressure. Under the steering wheel there are two buttons, one is tire pressure warning system, the other is SKS on/off. Just press the tire pressure warning system button for a few seconds (I think it responds with either a beep or a flash when it resets). Then the light will stay off until the pressure in one or more tires falls more than about 20%.

[Grypen]

I just wanted the light gone or disabled for when I put snow tires on. I will not be installing the sensors on the new wheels and really just did not want the annoyance of the light. Its probably just me but I like to have a clean install and a factory look and the tape idea would just be bothering me every time I see it. I check the pressures regularly anyway so it is not the most useful warning for me. Has anyone taken the dash apart in that area yet?

Chris

[N3FOL]

The 'going flat' warning light may come in handy and helpful on a long trip and your psi is decreasing due to a puncture on one of your tires. Hope this never happens, but to me it is peace of mind. But hey...it is your car so you have all the right in the world to disable that light. Perhaps try to pull a fuse out.

[JoesMorgue]

My wife got the light while driving home, she ignored it 'til she got home, then complained about it, thinking it was a fuel economy thing-gy. The tire had a non-repairable flat before she drove on it so no problem.

Don't get rid of the feature. Its annoying, but, as I read on one of the forums, he over-inflated his tires, reset the pressure, then lowered them down to normal. After that, a 2~3psi drop would activate the light.

Originally Posted by N3FOL

The 'going flat' warning light may come in handy and helpful on a long trip and your psi is decreasing due to a puncture on one of your tires. Hope this never happens, but to me it is peace of mind. But hey...it is your car so you have all the right in the world to disable that light. Perhaps try to pull a fuse out.

[dwreed3rd]

I am not recommending that you cripple the TPMS warning light. In fact as of 2008, it is a requirement on all new cars sold in the U.S. That said, on p.13-132 of the Bentley manual, there is a one wire Junction Connector from J20(A) to J21(b). It looks like the sole power source to the entire TPMS, including it's ECU, excluding the sensors of course. P.12-18 shows it located somewhere under the dash near the left hand side of the MFD. The experts here on PC should be able the give you an opinion as the whether disconnecting this connection would turn off the TPMS without other consequences or not, since the ECU will still be connected to the communications bus. I leave the rest up to you and the more knowledgeable members.

[Grypen]

Thanks for the replies everyone I will look into a fuse idea but if I can find that wire that supplies power I may be able to have the best of both worlds. I can splice in a switch that can be turned off for winter driving and on for the summer tires. Again thanks for the helpful replies.

Chris

[dwreed3rd]

Originally Posted by Grypen

Thanks for the replies everyone I will look into a fuse idea but if I can find that wire that supplies power I may be able to have the best of both worlds. I can splice in a switch that can be turned off for winter driving and on for the summer tires. Again thanks for the helpful replies.

Chris

F.Y.I. It looks like it's powered by the 7.5A ECU-IG fuse in yhe driver compartment fuse box. But it also powers lots of other devices. The Junction connector that I mentioned in the previous post looks to be the only connector between the fuse and TPMS, except the pin connectors on the fuse box and on the TPMS unit. That's why I mentioned it. The switch sounds like it would work. You could probably find a matching hardware to pop out the junction connector and plug in a connector with the wires to the switch. Stealth reversable.

[Grypen]

Thanks I did find that same fuse but there were to many other devices that it powers the wire you had mentioned seems to be the best solution. Would you be able to post a picture of where it is located? If not don't worry about it I am sure I will be able to find it on my own. This would be a much better solution than to go to the dealer to reprogram my TPMS twice a year. I guess I will be taking the dash apart again Monday.

Chris