It's a long story...grab a beverage...
Originally Posted by Cobrajet
See update at end of this post that explains the answer to the problem I'm about to describe to Cobrajet.
When my car was only a month old, I put it up on a lift in my garage. I removed the factory wheels (with functioning TPMS sensors) and carried them to a local Discount Tire. I bought a new set of wheels/tires from Discount Tire, and they removed the TPMS sensors from my factory wheels and installed them in my new wheels. I took the new wheels home and stacked them in a corner of my garage for a month. So my car was sitting in the air with no wheels/tires for something like 30 days.
I finally installed the new wheels and went for a test drive. Everything was fine and there were no TPMS lights on. I assumed everything was great because these were the original sensors from the car.
After about 15 minutes of driving, the TPMS light started flashing for a minute and then stayed on solid. Every time I started the car after that, the TPMS light would immediately begin flashing for 1 minute and then remain on constantly. My tire pressures were fine and the TPMS sensors were alive and broadcasting. 2 different shops checked the sensors (with a tool similar to a VT30) and verified that they were operational.
If the TPMS system has detected a system fault, the TPMS light will flash for 1 minute when you first start the car, and then it will remain on solid. The 2 primary reasons this would happen are because a) 1 or more sensors are not being detected (because of a dead sensor battery), or b) the sensor IDs in the wheels don't correspond the the 4 sensor IDs stored in the TPMS computer.
I knew the sensors were good...so I assumed that the sensor IDs in the new wheels did not correspond to the IDs in the car's computer. Unless Discount Tire broke and replaced one of my sensors without telling me (see UPDATE at bottom of this post), I have no idea how this would have happened. I don't know if not having any sensors on the car for a long period of time could have triggered the problem? The service manual says that when the car is stationary, the TPMS sensors will still send a signal to the computer every 13 hours. Maybe the computer freaked out when it didn't get a TPMS signal for 30 straight days or something. I don't know. Some day when I replace these tires, I'll check the TPMS sensors and see if one or more don't match the others. Then I'll know it was Discount Tire's fault. See UPDATE at bottom of this post...it WAS their fault.
Just like when the car sets an OBDII code and turns on the check engine light, the TPMS computer stores TPMS fault codes and turns on the TPMS light on. As I found out after visiting a local shop (and reading the service manual), if the Mirage TPMS system has any fault codes stored, you have to clear those codes before the computer can register any new sensor IDs. This is why the Mitsureset tool wasn't helping me. I needed to clear the TPMS computer codes first. Unfortunately, you have to have a really good scan tool to interface with the Mirage TPMS computer to clear codes. One local shop with an expensive tool couldn't do it. That's when I finally gave up and took the car to the dealer. They cleared the codes with no problem and registered my sensors (for $100).
I wish I would have spent some time asking the dealer tech how this happened. But by that time, I was just happy not to see that damned light flashing every time I started the car!
Absolutely...I think mine would have worked that way if something didn't go wrong. Whatever you do, don't drive the car with unregistered sensors or you may risk setting a TPMS code.
...hopefully I can just swap the wheels, plug the tool in, turn the ignition to ON, turn on the tool, then trigger...trigger...trigger...trigger.
Awesome! I really hope it's as simple as the instructions make it look.
I went ahead and ordered the MitsuReset and VT30 and I will post up the results here.
I thought I would post an update to this old thread. I just had to have a TPMS sensor replaced (February 2018)...and it turns out that it's NOT an OEM Mitsubishi sensor!
When Discount Tire swapped my original sensors into my new wheels, they must have broken and replaced at least 1 of my 4 sensors. That's why when I put my new wheels on my car, the TPMS light started flashing. I didn't completely understand how the TPMS system in the Mirage worked back then. Now I would have known that the tire shop screwed something up. If all 4 of my original sensors were in my new wheels, I would never have had an issue.
Last edited by Top_Fuel; 02-28-2018 at 08:37 PM.
View my fuel log 2015 Mirage ES 1.2 manual: 51.4 mpg (US) ... 21.9 km/L ... 4.6 L/100 km ... 61.7 mpg (Imp)