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sorry about this one 

 

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 Post subject: sorry about this one
Posted: Tue Aug 29, 2006 7:18 pm 
Stock as a Rock
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Age: 39

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Joined: 6th Jun 2005

Ride: el falcon

Location: Brisbane
QLD, Australia

what exactly does the ecu control? i just changed mine and was trying to reteach it, i now have working wipers and aircon, aswell as the fuel lid release, whereas i only had headlights and thermo fans before, smartlock light is still dim but still no click from the starter or anything mechanical, is there more to my dilemma?
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Posted: Tue Aug 29, 2006 9:39 pm 
Getting Side Ways
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Age: 31

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Ride: EL Fairmont Ghia

Location: Hobart
TAS, Australia

hmmm i would of thought all those things were controlled by the BEM except for some functionality in the air conditioner. ECU controls basically everything in the engine bay and sends signals to the dash etc but mosty all those signals go via the BEM if you have probelms i would look into changing ure BEM
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Posted: Tue Aug 29, 2006 9:40 pm 
Getting Side Ways
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Ride: EL Fairmont Ghia

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TAS, Australia

oh BEM is body electrics module, you probably didnt know this but yeah it controls all the electrics that are in the cabain of the car basically
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Posted: Tue Aug 29, 2006 9:43 pm 
Getting Side Ways
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Ride: BA Falcon Suzy Across

Power: 178 rwkw

Location: melbourne
VIC, Australia

doesn't the bem ultimately function as a subset of the ECU? or does it work independantely.

 

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Posted: Tue Aug 29, 2006 9:45 pm 
Stock as a Rock
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Age: 39

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Ride: el falcon

Location: Brisbane
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i thought they work together, without one the other wont work for anything
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Posted: Wed Aug 30, 2006 1:05 pm 
Getting Side Ways
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Location: Aberfoyle Park
SA, Australia

martyel wrote:
i thought they work together, without one the other wont work for anything


Exactly.

The BEM sends a signal to the ECU telling it that everything is ok security wise. If not it kills the injectors and if there are big problems like the ignition barrel if f**k it kills the starter motor.

The BEM is also responsible for everthing on your dash, like demist, int light, wipers, and all that crap.

For example if u have a fairmont and u want to wash the window the u pull it for 1 sec and it will work for a few seconds. In a GLi it will only be on as long as you pull it.

 

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