Question about 2003 Toyota Matrix

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Wont start after changing the alternator, battery, and MAF sensor

My car wont start. I changed the alternator and the battery. I also changed the MAF sensor, but when I turn the key it still wont start. I think its either the starter or something is wrong with my alarm. It really feels like the kill switch is on and I cant start the car. Please help. I am running out of patience and money.

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  • ajaramillocs May 19, 2009

    what kind of symptoms would I find if the computer is fried? The car is fine if I push start it. The alarm seems to be the problem.

  • ajaramillocs May 19, 2009

    2003 toyota matrix xrs manual trans

  • ajaramillocs May 20, 2009

    Yes it is a factory alarm. My clutch is on the verge of going bad. It is starting to slip alot. So If I understand you correctly, it could be the starter or the switch on the clutch peddel?

  • ajaramillocs May 20, 2009

    thank you very much. I will let you know how it works out.

  • kegood1961 May 11, 2010

    What make of car is it?
    Factory alarm?
    Alternator/battery did you run it flat?
    I'm assuming it's turning over.



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Sometimes the alarm thinks the pos. battery cable has been cut so it kills the ighition. You will have to look in the manual to see how to reset the alarm. You may need a code. If its not the alarm, you may have blown a fuse or worse, fried the computer when you put the alt. in. start at the begining. Check the battery cable connections, battery voltage, alt. wires and connections. if the headlighys work but the car won't start, it's prob. not a "connection" problem.

Posted on May 19, 2009

  • Bennie Kennedy May 20, 2009

    If the car will run by push starting it the computer is ok. If the computer was bad the car wouldn't run at all.Is this a factory alarm? If you can get to the starter, and you can get a remote starter button(it's just a push button with 2 wires. One hooks to the pos. battrey post , the other to the small post on the starter selonoid.) turn the key to on and push the remote starter button. If it starts, you need to check the switch on the clutch peddel. (this switch is like a nutral safety switch on an automatic trans.)

  • Bennie Kennedy May 20, 2009

    It could be the starter. You can check it with a multi meter if you have one. But the easy way to check it is with a remote starter button. I would start with the switch on the clutch peddle. Look under the dash, there will be a switch that the clutch comes in contact with. Unfortunately, you will need wiring schem. meters, ect. to test the switch. If the switch has moved out of adjustment, it's an easy fix, just move it to where the clutch peddle operates the switch. You can find the switch and push the button on it in by hand and see if it starts. If it does, replace the switch. To check the starter, you can get a large Gage wire (10 ga.), turn the key to run, hook the wire to the small post on the starter solenoid, then touch it to the pos. battery post. I don't recommend the wire trick too strongly because there is a potential for elect shorts. But it will work.



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