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What does it mean when the tcs light won't turn off and car starts jerking on a 1995 Mazda millenia?
Wiki User
∙ 12y ago
You have a vacuum leak somewhere in your system. Figuring out where is the hard part. All the those rubber vacuum lines get hard and brittle over time and leak. Replacing them can be hard because of the risk of snapping off a piece of a vacuum tee. The colder the weather the more of an effect the leak will have on your car. It is just a quirk in the Mazda ECU system that causes the tcs light to come on as well.
I'm guessing that this is a 2.3. what is happening is the car is going into limp home mode(tcs off/tcs lites on dash, car will not rev above 2500). the pcm and tcu modules are separate, and when pcm detects certain problems, it stops communicating with tcu, and the car goes limp home. most common is problems with the abv. ce lite comes on, and codes 1525/1526/1540 are stored. this is abv vacuum and vent solenoids circuit. the solenoids control the abv, and are connected by vacuum lines. if this is your car/problem, most common is the solenoids, next would be a vacuum leak. to check the solenoids, you need to ohm them. good is 26, if above 30, or 0, they are bad. also, they are affected by heat, and because they are near the firewall, they get a lot of heat. to effectively fix this problem, not only replace the solenoids, but the vacuum lines(21 ft) and tees. this is not a job for the weak of heart. the intake has to come off to get at the vacuum lines
Wiki User
∙ 12y ago
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