i took my car in for service.. they rotated my tires, changed my oil. thats it. when i got my car back, the tire pressure lights were on. i checked my tire pressure.. nothing wrong with it. i took it back to service, n they disabled the signal for me. 5 min later, it was turned back on again!!! how can i get things back to normal again????
Did you try resetting it yourself? The routine is in the manual. IIRC, you turn the ignition key on then hold down the tire pressure button on the dash until the icon stops flashing.
Hello:
I have a 2005 4WD Matrix, I drive approx 3000 miles per month and carry copier parts. I had some trouble initially with the tire pressure light. You must look at the driver door post for exact tire pressure. You will notice the fronts are 34 and the back are 32. This is not an approximation. If you set them all to 35 the light will constantly come back on. Set according to the recommendation and with the car stationary hold down the button for 10 seconds. The light will go out and will not come on again unless a problem develops. Over the last 20000 miles it has lit twice. Once was a nail, and I was able to drive to a shop before it went flat. The other was a large temp swing (55 one day -2 the next). But it has not relit for 4 months now. As has been my experience with 30 + years with many Toyota's it works just like it is supposed to.
What type of system is it? Direct or passive? I would think that higher pressure wouldn't trigger the light unless it was a passive system and 1 tire was extremely low. I guess since the front and rear are different PSI, the same pressure all the way around throws off the sensors. IMO, that's about half stupid. The sensors should only monitor low pressure or that which exceeds the max sidewall stamped pressure.
ITs a passive system, to reset the light, basically start the car, hold the tire button and the tire light will flash 3 times, once it has it has been reset and u should be worry free,
start the car, hold the tire button and the tire light will flash 3 times, ,
The ECM uses wheel speed variations to determine whether or not to turn on the light. ie: a lower pressue tire will rotate more frequently in a given distance as compared to a properly inflated tire. The above statement is corect. Also the ECM has to see certain variations in the first drive cycle or the light will come back on. It has to take turning corners into consideration.
Cheers
__________________ Toyota Tech 11 years and counting...In the trade 18 years.
Current ride...02 Echo
Future ride...Idea scrapped...Selling all the parts I collected
The ECM uses wheel speed variations to determine whether or not to turn on the light. ie: a lower pressue tire will rotate more frequently in a given distance as compared to a properly inflated tire. The above statement is corect. Also the ECM has to see certain variations in the first drive cycle or the light will come back on. It has to take turning corners into consideration.
Cheers
Why did Toyota choose a passive system instead of the better direct? (Not that you are the voice of Toyota or anything ) My car is not equiped with a system so this is just for information. Although something is better than nothing, a passive system is dangerous compared to a direct.
These systems give people a false sense of security if you aren't one to monitor your pressure yourself.
04 and up 4Runners and the new Rav4 use the active system with the sensors in the wheels. This system allows monitoring of the spare as well. The other difference is that the sensors are not cheap. I think about $93.00 CAD.
__________________ Toyota Tech 11 years and counting...In the trade 18 years.
Current ride...02 Echo
Future ride...Idea scrapped...Selling all the parts I collected
Why did Toyota choose a passive system instead of the better direct? (Not that you are the voice of Toyota or anything ) My car is not equiped with a system so this is just for information. Although something is better than nothing, a passive system is dangerous compared to a direct.
These systems give people a false sense of security if you aren't one to monitor your pressure yourself.
A passive system is cheaper to implement than a direct system. Passive system just reads the ABS sensors, something that the car already has. Direct monitoring system would require more equipment and add to the cost to manufacture and the price of the car.
i've run my tires accidently at all different pressure, i've gone to hight too low, whatever, that light never came on.
The passive system monitors the wheel speed from the ABS sensors and averages them. If you have one tire at 40 and one at 20, the system reads 30 and the light doesn't activate. That is why the passive system is only marginally better than nothing at all. An active system monitors each wheel. Also, with a passive system, if all 4 wheels are underinflated, then it won't trigger the sensor.
The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.
AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.
ToyotaNation.com is an independent Toyota/Lexus enthusiast website. ToyotaNation.com is not sponsored by or in any way affiliated with Toyota Motor Sales, USA, Inc. The Toyota, Lexus and Scion names and logos are trademarks owned by Toyota Motor Sales, USA, Inc.
Tire pressure light reset, really it is good!
Toyota Tech 11 years and counting...In the trade 18 years.
Linear Mode
