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STARTING PROBLEM 2000 Tacoma

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Old 10-18-2011, 10:33 PM   #1
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STARTING PROBLEM 2000 Tacoma

I was checking voltage on my MAF to install a two wire chip. I checked voltage across the white/red stripe and brown/white and it made a spark and now it will not start.
With the key in the on position only the battery,oil and for a few seconds the air bag light will come on. The battery and oil stay on.


Thanks for any help.
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Old 10-18-2011, 11:01 PM   #2
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The battery is good, I didn't have any problems until I caused the the spark or short.
I don't know if the MAF is protected by a fuse. If it is, it is some how connected to most of my dash lights
I hope this explains it better. The engine turns over great, just won't start
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Old 10-18-2011, 11:08 PM   #3
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I don't smell fuel, and I have checked most fuses but not all.
Could it be a relay? I damaged
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Old 10-18-2011, 11:44 PM   #4
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Not even a check engine with the key in the on position, that always comes on, it normally looks like a red Christmas tree with all the lights that come on before you start engine or put it in the on position. Now just the battery and oil come on in the on position. The air bag light comes on for about 3 second.
Every thing seems to work except for starting and the indicator lights
The chip instruction said check voltage between the 5 wires at the MAF and look for a reading of 2 to 4 volts dc.WELL THE FIRST TWO WIRES I CHECKED SPARKED and now it won't run. I called the company and then they tell me which wires to connect to. A little to late. They had no suggestion for the problem.
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Old 10-18-2011, 11:52 PM   #5
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Thanks for your help, I do think I wil start over
You were a great help, thanks for your time.
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Old 10-19-2011, 02:31 AM   #6
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The MAF is probably a heated-element type and uses a fused 12VDC feed...these are usually shared among other sensors including the starter enable circuit.

Look for a fuse labeled SENSORS, if no luck just start checking them all until you find the blown one.
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Old 10-19-2011, 02:57 AM   #7
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Thanks, I will try it
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Old 10-20-2011, 06:00 AM   #8
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It was the #15 a 20amp fuse. EFI 20 A:Multiport fuel injection system/sequential Multiport fuel injection system.
My dash lights started working and the Tacoma started up just fine.

Thanks for the help, it really needed it.
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Old 10-20-2011, 11:17 AM   #9
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I may be a little too late on this post but when you checked voltage between the two wires........ you MAY have had the multimeter on "ohm" or "resistance" mode. I'm not saying you did, but IF you did that means that the meter was in a closed loop circuit and it actually transitioned one wires' voltage to the other wire causing that mishap. Make sure it is on the dc voltage seletion when you test for voltage. Just maybe ruling out what had happened, but again you may have done everything like you were supposed to. Just trying to help. Glad to hear you got it back working.
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Old 10-21-2011, 04:09 AM   #10
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Quote:
Originally Posted by cepa136 View Post
It was the #15 a 20amp fuse. EFI 20 A:Multiport fuel injection system/sequential Multiport fuel injection system.
My dash lights started working and the Tacoma started up just fine.

Thanks for the help, it really needed it.
Congrats, just be careful w/ the multimeter as there are worse things that can happen...probe the O2 sensor signal circuit in Ohm mode and you can blow out the truck's powertrain control computer.
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Old 10-21-2011, 10:27 PM   #11
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I think I am going to put the multimeter away before I cause more damage. How often do you have to change a 02 sensor or is it just something that goes out.
It will be cheaper to have it changed out at a mechanic shop than have them change a computer I bet because I used the wrong setting on the meter.
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Old 10-22-2011, 04:23 AM   #12
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Quote:
Originally Posted by cepa136 View Post
I think I am going to put the multimeter away before I cause more damage. How often do you have to change a 02 sensor or is it just something that goes out.
O2 sensors sometimes last over 100K miles, sometimes less. You run them to failure, when the Check Engine light comes on and the code points to the O2 sensor. Not much use replacing them proactively.

The fact is that there is nothing useful to be had from resistance testing on that circuit anyway.

My '03 Tundra failed its driver-side front O2 sensor at around 85K miles. I replaced both front sensors, no further problems.
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Old 10-23-2011, 05:57 AM   #13
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I sure hope mine will go that well, because I have no plans of getting rid of the truck. I'm sure I will run into a lot of the small things that I turn into big problems.
Thanks for the input.
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