Post by
azureblaze »
https://forums.nicoclub.com/azureblaze-u99185.html
Wed Oct 01, 2008 5:42 am
First of all, there are two types of TPMS, Direct or Indirect.All Nissan Altima after +2008 comes with Direct Sensor TPMS system.
Direct sensor TPMS delivers real time tire pressure information to the driver of the vehicle - either via a gauge, a pictogramme display, or a simple low pressure warning light. These systems employ physical pressure sensors inside each tire, and a means of processing and sending that information from inside the tire to the vehicle instrument cluster.
Direct Sensor TPMS can identify simultaneous underinflation in all four tires in any combination.
Direct sensor TPMS are designed to specifically cope with the effects of changes in tire pressure due to ambient temperature changes and road to tire friction based temperature changes. Friction between the tire and road surface heats up the tire and increases the pressure in the tire. The alarm activation threshold pressures are usually set according to the manufacturers recommended "cold placard inflation pressures".
Most luxury cars indicate tire pressure warning light with show which tire is but All Nissan Altima only shows warning lights when one of tires pressure is low. From 2008, Every manufactured cars in United States of america must equipped TPMS sensor by law.