Sheared alternator bolt,, CEL,, limp mode?
#1
Sheared alternator bolt,, CEL,, limp mode?
The car is a 2005 Honda Civic lx, with a 1.7l sohc non vtec engine, and 5 speed manual gearbox. 142k miles. Two days ago, the alternator pivot bolt on my car sheared off, causing the alternator belt to fly off the pulley. The car died and lost all power while going thru an intersection. I had to have the car towed home. I bought a new bolt, and mounted everything back up. However the car seems to be in limp mode. It runs and drives, but poorly. It will barely rev and I hardly have any power. The exhaust smells rather rich as well. The rev counter and water temperature gauge do not work and my cel and immobilizer mil lamps are on. I did a little bit of research as to what could be the problem and I found out that the bolt and mount are what actually ground the alternator. When the bolt sheared, do you think an excessive amount of voltage arched to my ecu, frying it? I have tried resetting the ecu, by pulling the correct fuse (can't remember number) and removing the negative terminal battery cable, but it didn't resolve the problem. Any help figuring this out is appreciated!
#3
Re: Sheared alternator bolt,, CEL,, limp mode?
Thank you for your response.. I have checked the under hood ecu fuse. I wasn't aware of an ecu fuse in the cabin. I will check it.
Update: I couldn't find a fuse for the ecu under the dash. I did check the security and alternator fuses however. Both were good. I went ahead and checked the under hood Ecu fuse again to be certain- it's still good. Any other suggestions??
Update: I couldn't find a fuse for the ecu under the dash. I did check the security and alternator fuses however. Both were good. I went ahead and checked the under hood Ecu fuse again to be certain- it's still good. Any other suggestions??
Last edited by beat ignition; 06-25-2015 at 07:07 AM. Reason: Update
#4
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Re: Sheared alternator bolt,, CEL,, limp mode?
Your ECU got fried when the bolt sheared off causing the alternator to move. You need to get a new ECU and have your keys programmed to it.
#5
Re: Sheared alternator bolt,, CEL,, limp mode?
I was afraid of that response, but prepared for it. I know I can purchase a used ecu on eBay for a decent price. Which numbers need to match on the original to the used one? How much does Honda charge to reflash the ecu?
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Re: Sheared alternator bolt,, CEL,, limp mode?
I've never had a peek at my ECU, so I'm not sure. Post the numbers on it here and I'll see if I can assist you. We wouldn't know your local Honda Dealer's pricing to tell you what they'll charge either.
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#8
Re: Sheared alternator bolt,, CEL,, limp mode?
Well, I went ahead and purchased a used ecu. I made sure the numbers matched '37820 PLM A14' but the seller (or whoever) wrote 4DR with a paint pen on it. Will the 4 door ecu work with my coupe?
#11
Re: Sheared alternator bolt,, CEL,, limp mode?
Ok, I had the ecu flashed yesterday and it fixed the problem, but now another problem has emerged. Intermittently, while turning the steering wheel left or right, the horn will sound faintly. What could cause this??
Last edited by beat ignition; 07-07-2015 at 12:29 PM.
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