Computer fuse blown ?
12-16-2013, 10:49 AM
#1
Computer fuse blown ?
Couple weeks ago my car lit up check engine, I pulled into Autozone and the guy said he couldnt connect so it must be my computer fuse. Where is this fuse, I cant see ECM or COM or anything listed online. What else should I look under ?
The light since turned off, does light up at startup like normal. No issue idling or with power or anything like that.
The light since turned off, does light up at startup like normal. No issue idling or with power or anything like that.
12-16-2013, 02:51 PM
#2
The check engine light will light as a light bulb test when you turn the key to the ON position. So do all the other warning lights. But after you start the engine, all the lights should be off unless there is a problem.
There are 2 fuses to check, Fuse # 10 and # 12. Fuse # 10 is in the top row, 2nd from the right. Fuse # 12 is in the middle row, the one on the left end. But both of these fuses provide power to other things in the car, like clock, tail lights, NATS and so on.
One thing about connecting a scanner - the ignition switch must be in the ON position. The OBD II scanner looks for 12 volts on one of the pins to tell it that a car is connected. Was the key turned on?
There are 2 fuses to check, Fuse # 10 and # 12. Fuse # 10 is in the top row, 2nd from the right. Fuse # 12 is in the middle row, the one on the left end. But both of these fuses provide power to other things in the car, like clock, tail lights, NATS and so on.
One thing about connecting a scanner - the ignition switch must be in the ON position. The OBD II scanner looks for 12 volts on one of the pins to tell it that a car is connected. Was the key turned on?
12-30-2013, 01:15 PM
#5
I don't exactly know what to suggest. If the check engine light is off and the car is running OK, I would chalk it up to some temporary fluke.
My car will give me a check engine light for an oxygen sensor after an extended high speed drive. Until it becomes permanent, I am not going to worry about it.
As for the OBD scanner not working, why don't you try another place and see if it connects. If the autozone by you is like the one by me, there is a high probably that the problem was operator error.
My car will give me a check engine light for an oxygen sensor after an extended high speed drive. Until it becomes permanent, I am not going to worry about it.
As for the OBD scanner not working, why don't you try another place and see if it connects. If the autozone by you is like the one by me, there is a high probably that the problem was operator error.
12-30-2013, 09:02 PM
#6
Member
Join Date: Aug 2002
Location: Las Vegas
Posts: 104
Look at the back side of the DLC connector (the part the scanner plugs into). There should be a green wire and a yellow wire with a red stripe. Use a circuit tester light to check for power at the Y/R wire. It should be 12V always. Then check the G wire. It should be 12V only with the key on. If either of these are dead, either fuse 10 or 12 is actually bad, or you have a wiring issue.
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