I NEED Boost... Opinions puh-lease - Page 25 - Toyota Yaris Forums

CTScott · 12-09-2012, 03:47 PM

Quote:

Originally Posted by Focus_Sh1ft

Great news! Threw the ECM back in the car and we still have the same problems! (I must live a pretty depressing life if I consider that 'good news'

)

CTScott - is there ever a time you don't pull through? lol
Are the markings significant to you? I ask for two reasons. One: could I possibly pick up an equivalent diode at a local electronics store? Two: I noticed yaris2010RS has what looks like 'T3 91'. Wondering if there's any substantial differences. For reference, my ECM is for a 2008 automatic (part# 89661-52G50).

If all else fails, I'll gladly take you up on your generous offer. Thanks again!

The 81/91 are likely date codes and the T3 is the identifier.

It appears to be a BAV19W - BAV21W:

http://www.diodes.com/datasheets/ds12024.pdf

Focus_Sh1ft · 12-09-2012, 04:10 PM

Unfortunately, since these look to be used largely for commercial use, obtaining one (or even a few) looks pretty impractical.

I was trying to match some typical diodes found at a place like radioshack against the electrical characteristics in that link, but no luck.

Getting the piece from you looks like the best way to proceed. I'll send you my info shortly.

Also: Is anyone as baffled as myself as to how this happened? Technically I've been running the ECM in "limp mode," so maybe that circuit was spending too much time outside it's expected operational range or something? Weird.

yaris2010RS · 12-09-2012, 02:21 PM

CTScott i wished toyota let me keep the old ECM as i would have loved to donate it to you

Focus_Sh1ft · 12-13-2012, 02:42 PM

Welp, this board is dead. Diode made no difference (yes I observed polarity).

Let's talk about replacement ECMs. My number one concern is if I'm going to need reprogramming or not. From what I understand, since I don't have an immobilizer I shouldn't need it. I'll have a VIN mismatch obviously but I'm pretty over that.

Also probably going to grab a part# 89661-52G51 since they're more available.

CTScott · 12-14-2012, 12:48 PM

Quote:

Originally Posted by Focus_Sh1ft

Welp, this board is dead. Diode made no difference (yes I observed polarity).

Let's talk about replacement ECMs. My number one concern is if I'm going to need reprogramming or not. From what I understand, since I don't have an immobilizer I shouldn't need it. I'll have a VIN mismatch obviously but I'm pretty over that.

Also probably going to grab a part# 89661-52G51 since they're more available.

With a non transponder key one the only thing that ideally needs to be programmed is the VIN. This can be done via techstream. If you don't have it done, if your state does an inspection or emissions check, where they plug into the OBD connector, the VIN will read incorrectly.

If you don't want to deal with the dealer for the VIN reprogram, ship me the ECM and I'll program it for you.

Focus_Sh1ft · 12-17-2012, 04:54 PM

Got the new ECM today and it did absolutely NOTHING. I have the same problem... I even opened it up to see if it failed in the same way thinking maybe a short in the harness. It was fine.

I'm losing my mind over this... The only things left to check are the integration relay and fuel pressure.

Anyone else have any other ideas? Once I rule those two out, I really don't know what else to do...

CTScott · 12-17-2012, 07:22 PM

Quote:

Originally Posted by Focus_Sh1ft

Got the new ECM today and it did absolutely NOTHING. I have the same problem... I even opened it up to see if it failed in the same way thinking maybe a short in the harness. It was fine.

I'm losing my mind over this... The only things left to check are the integration relay and fuel pressure.

Anyone else have any other ideas? Once I rule those two out, I really don't know what else to do...

Are you running a F/IC, or just the ECM by itself?

yaris2010RS · 12-09-2012, 08:20 PM

my bet is water.......

Ill check tomorrow at a local electronics surplus store. Radioshack wont have anything like this, you need to go to a real electronics store....

CTScott · 12-09-2012, 11:39 PM

Pulled, packed, and ready to head to the post office in the morning:

ECM Diode.jpg

Focus_Sh1ft · 12-10-2012, 01:47 PM

Quote:

Originally Posted by CTScott

Pulled, packed, and ready to head to the post office in the morning:

Attachment 49257

Excellent.

So I discovered something interesting while digging around. Apparently, the 2008 model year switched ECM models only two months into production. Common sense says Toyota must have found something pretty bad to merit changing the ECM during the production run, rather than waiting for the following year.

CTScott · 12-10-2012, 04:02 PM

Quote:

Originally Posted by Focus_Sh1ft

Excellent.

So I discovered something interesting while digging around. Apparently, the 2008 model year switched ECM models only two months into production. Common sense says Toyota must have found something pretty bad to merit changing the ECM during the production run, rather than waiting for the following year.

Which part number ECM do you have? Looking at the EPC, for AT equipped Yaris only there was a change in 11/2007, with the build having started in 8/2007.

Bluevitz-rs · 12-10-2012, 12:35 AM

Pick your poison

Focus_Sh1ft · 12-10-2012, 06:25 PM

^ That's exactly what I'm talking about. I have 89661-52G50 and they started using 89661-52G51 in 11/07. Haven't been able to find anyone else with ECM failures though, but then again that is a fairly small window.

CTScott · 12-10-2012, 06:32 PM

Quote:

Originally Posted by Focus_Sh1ft

^ That's exactly what I'm talking about. I have 89661-52G50 and they started using 89661-52G51 in 11/07. Haven't been able to find anyone else with ECM failures though, but then again that is a fairly small window.

Crashy and Crashy 2 both have the 89661-52G50. The outer aluminum of Crashy's ECM is super oxidized. I really should open it to see if any of the salt has made its way inside yet. There wasn't a TSB on the change, so the 89661-52G51 isn't considered a necessary replacement, so they probably did some minor tweaking to the AT control, since the MT didn't get revved.

Focus_Sh1ft · 12-12-2012, 01:43 PM

Leave it to USPS to take what should have been 1 day shipping and turn it into what is going to be at least 3 days now. Ugh.

CTScott · 12-12-2012, 02:06 PM

Quote:

Originally Posted by Focus_Sh1ft

Leave it to USPS to take what should have been 1 day shipping and turn it into what is going to be at least 3 days now. Ugh.

Tracking shows that it was delivered today.

Focus_Sh1ft · 12-12-2012, 02:12 PM

Oh boy.

Bluevitz-rs · 12-13-2012, 02:45 PM

Well that's sucks! I gues you just need a non Imobilizer ECU as a replacement then.

12-09-2012, 02:21 PM	#3
yaris2010RS View User's Garage Drives: no-longer-boosted '10 Yaris Join Date: Nov 2009 Location: Angus, Ontario Posts: 1,891	CTScott i wished toyota let me keep the old ECM as i would have loved to donate it to you __________________ If it has boobs or wheels sooner or later your gonna have problems with it

12-09-2012, 08:20 PM	#8
yaris2010RS View User's Garage Drives: no-longer-boosted '10 Yaris Join Date: Nov 2009 Location: Angus, Ontario Posts: 1,891	my bet is water....... Ill check tomorrow at a local electronics surplus store. Radioshack wont have anything like this, you need to go to a real electronics store.... __________________ If it has boobs or wheels sooner or later your gonna have problems with it

12-09-2012, 11:39 PM	#9
CTScott ULTIMATE View User's Garage Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008 Location: USA, CT Posts: 13,460	Pulled, packed, and ready to head to the post office in the morning: ECM Diode.jpg __________________

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12-09-2012, 04:10 PM	#2
Focus_Sh1ft Drives: 08 Yaris Turbo; 06 tC Turbo Join Date: Jan 2010 Location: New Jersey Posts: 875	Unfortunately, since these look to be used largely for commercial use, obtaining one (or even a few) looks pretty impractical. I was trying to match some typical diodes found at a place like radioshack against the electrical characteristics in that link, but no luck. Getting the piece from you looks like the best way to proceed. I'll send you my info shortly. Also: Is anyone as baffled as myself as to how this happened? Technically I've been running the ECM in "limp mode," so maybe that circuit was spending too much time outside it's expected operational range or something? Weird.

12-13-2012, 02:42 PM	#4
Focus_Sh1ft Drives: 08 Yaris Turbo; 06 tC Turbo Join Date: Jan 2010 Location: New Jersey Posts: 875	Welp, this board is dead. Diode made no difference (yes I observed polarity). Let's talk about replacement ECMs. My number one concern is if I'm going to need reprogramming or not. From what I understand, since I don't have an immobilizer I shouldn't need it. I'll have a VIN mismatch obviously but I'm pretty over that. Also probably going to grab a part# 89661-52G51 since they're more available.

12-17-2012, 04:54 PM	#6
Focus_Sh1ft Drives: 08 Yaris Turbo; 06 tC Turbo Join Date: Jan 2010 Location: New Jersey Posts: 875	Got the new ECM today and it did absolutely NOTHING. I have the same problem... I even opened it up to see if it failed in the same way thinking maybe a short in the harness. It was fine. I'm losing my mind over this... The only things left to check are the integration relay and fuel pressure. Anyone else have any other ideas? Once I rule those two out, I really don't know what else to do...

12-10-2012, 12:35 AM	#12
Bluevitz-rs 1NZ-6spd View User's Garage Drives: '05 6-Spd Vitz RS Join Date: Oct 2008 Location: Oshawa, Ontario, Canada Posts: 2,967	Pick your poison

12-10-2012, 06:25 PM	#13
Focus_Sh1ft Drives: 08 Yaris Turbo; 06 tC Turbo Join Date: Jan 2010 Location: New Jersey Posts: 875	^ That's exactly what I'm talking about. I have 89661-52G50 and they started using 89661-52G51 in 11/07. Haven't been able to find anyone else with ECM failures though, but then again that is a fairly small window.

12-12-2012, 01:43 PM	#15
Focus_Sh1ft Drives: 08 Yaris Turbo; 06 tC Turbo Join Date: Jan 2010 Location: New Jersey Posts: 875	Leave it to USPS to take what should have been 1 day shipping and turn it into what is going to be at least 3 days now. Ugh.

12-12-2012, 02:12 PM	#17
Focus_Sh1ft Drives: 08 Yaris Turbo; 06 tC Turbo Join Date: Jan 2010 Location: New Jersey Posts: 875	Oh boy.

12-13-2012, 02:45 PM	#18
Bluevitz-rs 1NZ-6spd View User's Garage Drives: '05 6-Spd Vitz RS Join Date: Oct 2008 Location: Oshawa, Ontario, Canada Posts: 2,967	Well that's sucks! I gues you just need a non Imobilizer ECU as a replacement then.