Hmm. I'll keep an eye open for an ECU, too. I agree with the suggestion that getting a UZZ31 version may be easier and should be at least a workaround and potentially a proper solution.
Assuming that you do get the UZZ31 ECU, and that the only difference between UZZ31 and UZZ32 ECUs of a particular vintage is the "processor chip"... Has anyone looked further into what chip it actually is?
I'm not an electronics specialist, but it sounds like it might just be a ROM chip with some settings stored? If so, it should - at least in principle - be possible to "clone" that chip by reading the data from a working one and writing it into a compatible EEPROM chip.
This might not help Zul today (unless his chip is damaged as well) but could be a good "insurance policy". [I don't jump-start my soarer - but I do occasionally jump-start other cars from the soarer, and I'd hate for something like this to happen to mine].
If anyone has an ECU apart, a high-res photo of the chip itself (in case it has any manufacturer codes etc) would allow me to make some enquiries. Alternatively, some info on where the ECU is located and whether it is hard to get to might give me the courage to pull mine apart.
Robert Hayden Moderator Victoria 2 x 1991 UZZ32, 1991 UZZ32 Supercharged, 2 x UCF11 Celsior 1990, 2 x Ferrari Testarossa, Range Rover Vogue SE.
Thursday, April 12, 2007 - 06:29 pm, by: Robert Hayden(The_boss)
The ECU code in a 30/31/32 is all the same. There are no differences to make a 32 bounce off the line faster due to the extra weight or anything like that.
Unknown to many, a 32 has an early version of a stability control as part of the active suspension. There is one input into the ECU for this to operate, this appears to be the only difference between the ECU's from what we can ascertain.
The stability control is hardly noticable and unless you knew exactly what to look for, you would never know if it's there or not. My own 32 has run a 31 ECU for years with no issues at all and drives and behaves perfectly.
If David's willing to try your ECU in his car, then send it out. At least that verifies that it's rooted or good. At that point you may want to send it on to Damian Ware for a look at it. Maybe something he can see, and fix.
Thursday, April 12, 2007 - 07:40 pm, by: David Vaughan(Davidv)
I am happy to help. I think the risk is low.
Michael, there is already a complete copy of the ECU ROM code held by a site member. Obviously, there are copyright issues in reproducing it for people on a general basis. OTOH, if the processor has fried then ROM code is not a solution.
Roger Costello TryHard WA UZZ31 V8 Limited, UZZ32 no 867
Thursday, April 12, 2007 - 09:28 pm, by: Roger Costello(Roger)
Rob,
Thanks very much for clearing up the difference between the UZZ30/31 and 32 ECU's. That explains something that has been bothering me for a long time. The reason I used "supposedly" and "possibly" to describe the difference is that I have not seen any map variations in the UZZ31/32 ECU's of the same vintage that I've looked at. It seemed very unlikely that Toyota would have different part numbers for the UZZ32 ECU's unless there were actual differences between the parts. Not knowing about the stability control connection I gave credence to the plausible "difference in mapping" explanation for the different part numbers.
What is clear is that there were many revisions of the ECU ROM image during the production of the same part number ECU's. It is hard to know if these are tweaks, bug fixes or whatever but generally later ECU's in the same series went harder.
The explanation of the 32 ECU having a different tune may be based on someone in the past comparing a later active ECU with an earlier UZZ30/1 ECU in the same car. Some of the 92 and 93 V8's seem a lot quicker than the early 91's. Electronic stability control on a 32 is something that is hinted at in the SAE papers but not described in detail. Can you say which pin on the 32 ECU is used for the stability control function?
Friday, April 13, 2007 - 11:50 am, by: Zul Idris(Zman)
Rob, I know the Ecu is completely stuffed because the car is completely dead. try to turn the key and there is no ignition while turning over. no spark.
besides seeing the hole in the PC board and disconnected capacitors, there was no more testing.
I have in fact already sent the ecu to Damien for a look see. He should get it next week if there is no more bad luck.
I would definitely get 2 replacements if i could but i currently cant even find one! maybe as in life there will be a time when no one is looking anymore they will just appear and i could get 10 if i wanted....
Friday, May 11, 2007 - 02:31 am, by: Zul Idris(Zman)
Hi all, It's been a useless wait for a replacement.. Neil managed to find an ecu with the same pinouts on auction from japan. Thanks for the effort Neil! i bought it and got it sent to me 2 days ago (bought a few weeks back). And the car won't start. there is no dash display and i'm not really surprised.. the ecu wasn't from a soarer- wasn't similar in model number and i think it's maybe from a toyota majesty?? with the 1UZ-FE v8.
OH SOMEBODY HELP ME....
Damian do you think there is any use in me sending this to you for salvaging the original?
Lynton Scale Tinkerer Vic UZZ32 Active V8, RX3 Coupe 13bt
Previous
Closed: New threads not accepted on this page
