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Old 12-02-2014, 06:01 PM   #1
BIGJCB7
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Bad Main Relay? Bad ECU?

Today getting out of work I start up my car and let it warmup. When all of a sudden a loud whistling noise started to come out of the engine bay, I immediately shut the car off but the engine kept running with the key out. I ran back to my office to grab a fire extinguisher in the case a fire broke out. When I get back to the car, the car is off. I get back in and noticed the courtesy nor dome light came on, so I put my key in looked at the instrument panel and nothing would come on nor the engine would crank over.

what could be the problem?

A bad ECU not receiving any signal in the lines?

Could it be the main relay that has gone bad and probably cracked from the solder points?

thank you in advance
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Old 12-02-2014, 10:31 PM   #2
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A main relay would have nothing to do with your courtesy lights. I would first check voltage to the battery. Also check the fuses, ECU fuse would be one of them.

I'm unsure of the whistling. Keep us updated.

EDIT: Your car would be off, considering you took the keys. Did you inspect the engine bay for any smell, or possibly smoke? Sounds like a short but it can be a million different things.
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Last edited by jdm_inspired; 12-02-2014 at 10:33 PM.
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Old 12-02-2014, 10:54 PM   #3
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Quote:
Originally Posted by jdm_inspired View Post
A main relay would have nothing to do with your courtesy lights. I would first check voltage to the battery. Also check the fuses, ECU fuse would be one of them.

I'm unsure of the whistling. Keep us updated.

EDIT: Your car would be off, considering you took the keys. Did you inspect the engine bay for any smell, or possibly smoke? Sounds like a short but it can be a million different things.
After having a buddy of mine tow my car over to a friends shop later on I opened the hood and did smell something funky in the engine bay.

I couldn't check out the fuses or anything because it was raining so I'll have to swing by tomorrow to my friends shop when he's there to check it out properly.
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Old 12-02-2014, 11:51 PM   #4
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If all fuses and such check out, you might check out the ignition switch itself.
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Old 12-03-2014, 06:33 AM   #5
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Sounds like your ignition switch or starter is shorting out. I beleave that sound you heard was your starting running. Just an idea I'm throwing out there.
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Old 12-03-2014, 03:54 PM   #6
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So I went over to my friends shop and he told me it was shorting out and that the starter is bad. I'll keep you guys posted tomorrow when he installs the parts to see if it cranks over normal and runs with out dying out.
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Old 12-04-2014, 04:56 PM   #7
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Well guys she's up and running. Thank you for giving out ideas to keep in mind to have checked out also.
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