I NEED Boost... Opinions puh-lease - Page 24 - Toyota Yaris Forums

CTScott · 12-09-2012, 08:34 AM

The obliterated device is a large diode. The markings on it are "T3 81". If you would like I can pull the one off of the ECM in the picture below and send it to you. I have been using this ECM as a sacrificial lamb for people needing components.

ECM 1.jpg

Focus_Sh1ft · 12-09-2012, 11:47 AM

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'

)

Quote:

The obliterated device is a large diode. The markings on it are "T3 81". If you would like I can pull the one off of the ECM in the picture below and send it to you. I have been using this ECM as a sacrificial lamb for people needing components.

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!

yaris2010RS · 12-09-2012, 01:21 PM

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

CTScott · 12-09-2012, 02:47 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, 03:10 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, 07:20 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, 10:39 PM

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

ECM Diode.jpg

Bluevitz-rs · 12-09-2012, 11:35 PM

Pick your poison

Focus_Sh1ft · 12-10-2012, 12:47 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, 03:02 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.

Focus_Sh1ft · 12-10-2012, 05:25 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, 05:32 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, 12:43 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, 01:06 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, 01:12 PM

Oh boy.

Focus_Sh1ft · 12-13-2012, 01:42 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.

Bluevitz-rs · 12-13-2012, 01:45 PM

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

yaris2010RS · 12-14-2012, 10:40 AM

from what i have gathered from a mechanic (chrysler but same thing), you will be able to switch it out without issue. if you have keyless entry (lock and/or unlock on your key fob) you may need to reprogram this feature. he said it depends on the specific car. (Im sure CTScott would be able to answer that)

As per the chip key thing, has anyone confirmed that a new ECM would need this programmed in? from what my dash cam caught of My ECM replacement they did not program any keys (nor did they ask/ensure i had all my keys with me). They may have transferred the data off my old one onto my new one but i am not sure

12-09-2012, 08:34 AM	#415
CTScott ULTIMATE View User's Garage Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008 Location: USA, CT Posts: 13,450	The obliterated device is a large diode. The markings on it are "T3 81". If you would like I can pull the one off of the ECM in the picture below and send it to you. I have been using this ECM as a sacrificial lamb for people needing components. ECM 1.jpg __________________

12-09-2012, 01:21 PM	#417
yaris2010RS View User's Garage Drives: no-longer-boosted '10 Yaris Join Date: Nov 2009 Location: Angus, Ontario Posts: 1,886	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, 07:20 PM	#420
yaris2010RS View User's Garage Drives: no-longer-boosted '10 Yaris Join Date: Nov 2009 Location: Angus, Ontario Posts: 1,886	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, 10:39 PM	#421
CTScott ULTIMATE View User's Garage Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008 Location: USA, CT Posts: 13,450	Pulled, packed, and ready to head to the post office in the morning: ECM Diode.jpg __________________

12-14-2012, 10:40 AM	#432
yaris2010RS View User's Garage Drives: no-longer-boosted '10 Yaris Join Date: Nov 2009 Location: Angus, Ontario Posts: 1,886	from what i have gathered from a mechanic (chrysler but same thing), you will be able to switch it out without issue. if you have keyless entry (lock and/or unlock on your key fob) you may need to reprogram this feature. he said it depends on the specific car. (Im sure CTScott would be able to answer that) As per the chip key thing, has anyone confirmed that a new ECM would need this programmed in? from what my dash cam caught of My ECM replacement they did not program any keys (nor did they ask/ensure i had all my keys with me). They may have transferred the data off my old one onto my new one but i am not sure __________________ If it has boobs or wheels sooner or later your gonna have problems with it

12-09-2012, 03:10 PM	#419
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.

12-09-2012, 11:35 PM	#422
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, 05:25 PM	#425
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, 12:43 PM	#427
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, 01:12 PM	#429
Focus_Sh1ft Drives: 08 Yaris Turbo; 06 tC Turbo Join Date: Jan 2010 Location: New Jersey Posts: 875	Oh boy.

12-13-2012, 01:42 PM	#430
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.

12-13-2012, 01:45 PM	#431
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.

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