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03-24-2001, 03:17 PM | #1 |
Scooby Specialist
Member#: 2024
Join Date: Aug 2000
Chapter/Region:
NESIC
Location: South Portland, ME
Vehicle:2005 Legacy 2.5i Atlantic Blue Pearl |
Sick of alarm making you deaf after ECU reset?
A trick I figured out the last time I had my battery disconnected:
When you're ready to reconnect the battery: 1. Put the key in the ignition and turn to the "on" position. 2. Connect the battery 3. Take the key out 4. Tighten the bolt on the battery connection. This keeps the alarm from going off when the battery gets reconnected. (At least it does on my alarm system, and I'm not sure if my alarm is OEM or aftermarket because I bought the car used)
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03-24-2001, 07:24 PM | #2 |
Scooby Specialist
Member#: 3198
Join Date: Dec 2000
Location: Portland, OR USA
Vehicle:2005 GT LTD Wagon Garnet Red |
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03-24-2001, 08:08 PM | #3 |
Scooby Specialist
Member#: 391
Join Date: Oct 1999
Location: The land of many Subies
Vehicle:2004 STi Blue/Gold 2000 RS BRP |
OK, so who here has already tried the MRT method and actually gotten results?? Do you have to remove panels or anything to get to the plugs??
JJ |
03-25-2001, 12:09 AM | #4 |
Scooby Specialist
Member#: 2024
Join Date: Aug 2000
Chapter/Region:
NESIC
Location: South Portland, ME
Vehicle:2005 Legacy 2.5i Atlantic Blue Pearl |
Actually, I had the battery disconnected because I was swapping my bumper beam and bumper, and didn't want the airbags going kablooee while I did it.
But I might as well ask: what makes that way the right way? |
03-25-2001, 02:15 AM | #5 |
Scooby Newbie
Member#: 1021
Join Date: Mar 2000
Location: Vancouver, B.C. Canada
Vehicle:1999 2.5 RS Blue :) |
Err. Couldnt you just set the alarm to valet mode before you disconnect the battery?
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03-25-2001, 07:36 AM | #6 |
Scooby Specialist
Member#: 102
Join Date: Jul 1999
Location: The meeting place
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OK not sure what kinda alarm you guys are using. But all I have to do before disconnecting the battery is to either set the thing to valet mode or dissarm the alarm. Never had it wail on me upon reconnecting the battery.
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03-25-2001, 10:21 AM | #7 |
Scooby Specialist
Member#: 2024
Join Date: Aug 2000
Chapter/Region:
NESIC
Location: South Portland, ME
Vehicle:2005 Legacy 2.5i Atlantic Blue Pearl |
It freaks out unless I follow the steps above. Yes, I've disarmed it first; yes, I've put it in valet mode first. No, it doesn't make any difference. Maybe I should roll my eyes at you guys with alarms that don't care if someone is messing w/ your battery?
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03-25-2001, 11:29 AM | #8 |
Scooby Specialist
Member#: 3198
Join Date: Dec 2000
Location: Portland, OR USA
Vehicle:2005 GT LTD Wagon Garnet Red |
Well, it's the right way for a few reasons.
1) You aren't disconnecting your battery and setting off your alarm/losing your radio presets/clock settings/any other electrical pre-sets. 2) When you do the battery method, you're pretty much playing a crap shoot that you've left the battery disconnected long enough to discharge the caps that are designed specifically to avoid an ECU reset when the power is disconnected temporarily. Personally I'd rather do it in a way where I get positive feedback that the reset has been successfu. |
03-25-2001, 09:38 PM | #9 |
Scooby Specialist
Member#: 1447
Join Date: May 2000
Location: Austin, TX, US
Vehicle:2000 Impreza 2001 Dodge 2500 |
skywalker- I was just going to say that, but I usually use a t-shirt.
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03-26-2001, 12:23 AM | #10 |
Former Vendor
Member#: 1990
Join Date: Jul 2000
Location: San Diego, CA
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Really simple solution...
Stuff a few paper towels in the horn for the alarm before you reconnect the ECU. It will quiet it down or even just shut it up sometimes. |
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