P0505>> Definitive Inspection/Diagnosis Thread
#41
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That post was Spanish dude.
So, the P0505 popped up with it unplugged finally. Good, I guess.
I plugged in another IACV that tested good (ohms test on motor) without connecting it, and the same issue came back (fluctuating RPM). I didn't expect that.
This tells me that the engine is looking for a specific response in RPM change when it actuates the IACV, and it goes all funky if it doesn't see it.
There is another component to the IACV, the actual 'butterfly' type shaft that it seems to turn when it actuates. I'm betting it likes to seize up due to steel on aluminum corrosion.
and if that butterfly is seizing up, then the motor is trying to move with something in it's way, which could cause it to overheat or draw excess amps.
An idea. A new one.
So, the P0505 popped up with it unplugged finally. Good, I guess.
I plugged in another IACV that tested good (ohms test on motor) without connecting it, and the same issue came back (fluctuating RPM). I didn't expect that.
This tells me that the engine is looking for a specific response in RPM change when it actuates the IACV, and it goes all funky if it doesn't see it.
There is another component to the IACV, the actual 'butterfly' type shaft that it seems to turn when it actuates. I'm betting it likes to seize up due to steel on aluminum corrosion.
and if that butterfly is seizing up, then the motor is trying to move with something in it's way, which could cause it to overheat or draw excess amps.
An idea. A new one.
Last edited by NmexMAX; 02-25-2013 at 07:16 AM.
#42
#48
#53
#54
Yeah i caint wait to see how the max acts after sitting for 11 months not being started
#55
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One thing I'm not currently understanding is this...
TERMINALS #2 AND #5 = BATTERY VOLTAGE
I'm assuming, this means the ECM supplies ground return paths through Terminals 1, 3, 4, 6 from the IACV. This allows current flow and the motor actuates.
From what I see though, every coil operates on Battery Voltage at all times, does this sound correct?
If that is the case, then I can do as you say, and easily mimic the operation of this motor on the bench, while monitoring current flow through each coil.
Then I'll monitor current flow through each coil with it fully installed in an IACV housing that includes the butterfly valve shenanigans, and see what the difference is.
#56
If that is the case, then I can do as you say, and easily mimic the operation of this motor on the bench, while monitoring current flow through each coil. Then I'll monitor current flow through each coil with it fully installed in an IACV housing that includes the butterfly valve shenanigans, and see what the difference is.
#57
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Thanks for the info dude!
I've only replaced the Motor, not the entire assembly. The entire assembly includes the valve that the motor actually acts upon, which I'm going to pull apart and check, I think it could be corroding and seizing causing issues.
I do not think there is anything wrong with either one of the IACV motors themselves. I'd wager to say the Driving circuit is fine also, but can't say that for sure at this point.
I've only replaced the Motor, not the entire assembly. The entire assembly includes the valve that the motor actually acts upon, which I'm going to pull apart and check, I think it could be corroding and seizing causing issues.
I do not think there is anything wrong with either one of the IACV motors themselves. I'd wager to say the Driving circuit is fine also, but can't say that for sure at this point.
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