A340e Speed Sensor

[Glenno52]

I have fitted an Engine and Auto transmission from a GX81 Front cut. 1G-GZE.
The Speed Sensor in the transmission has three wires. Part No. 89544-30010
The ECU has one SP2 pin.
Which one goes to the ECU, and where do the others go?
The SP2 ECU pin wire did not go directly to the transmission. I'm thinking it might have gone to the Cruise Control or ABS or elsewhere first.
Do i need a different Sensor for the transmission with only one wire to hook it up direct?
I'm not using the Cruise Control or ABS. The ECU and ECT controls are in same Box.
I have been able to get the transmission to shift correctly by temporarily connecting the donor car speedo and using SP1, so i know all the rest of the system is right. However i want to retain the original cars dash and speedo, so i need to get SP2 to do the work.
Any info on different Speed Sensors for the A340e greatly appreciated.
[IMG][/IMG]
Thanks,
Glen.

[Mos]

Hi,
This is the ABS speed sensor. Its output (32ppr) normally goes to the ABS/TRC computer (in the boot in an *X8*) which then divides this signal to 1ppr for a 7M-GE or 4ppr for a 1JZ-GTE for the SP2 signal. No idea what the pulse rate on a 1G is but if I had to take a stab it would be 1ppr.
You either:
1) Put up with using SP1.
2) Build/obtain a divider circuit which generates the appropriate SP2.
3) Cut/grind enough lobes of the 32pulse sensor to get either 4 or 1 lobe left.
The other two wires are ground and power, both supplied through the ABS/TRC computer.
BTW, this topic has been covered to death many times
Mos.

[The Real Roadrunner]

i have a 1g a340 sitting here and ill get mos to have a look at it tomoz if he has the time

Hi,
BTW, this topic has been covered to death many times
Mos.

any chance of a linky mr mos as i tried searching also and couldn't find squat, or change the search engine to pick up 2char and it may be easier.

cheers
thefinisherof1UZIS200

[Glenno52]

Hmmm, So there is no other speed sensor to use in its place??
If the ABS stuff was in the boot, no wonder i'm having trouble as i only had a front cut.
Might have been able to work it out myself if only i could have found the appropriate post!
Still havn't found it yet, but hey, this is all new to me. I'll keep trying, they say you're never too old to learn! Unfortunately, i'm one of those few people left that don't know everything.
Please bear with me. Who knows, i might one day be able to contribute something here to help someone else. We can only hope!
Thanks again,
Glen.

[ra65]

You don't need to hook this sensor up for the box to work. I am running mine like this at the moment. There are two types, the one you have shown there (abs) and another which is for non abs cars. To swap the two you have to take off the extension housing and change the trigger wheel thing on the output shaft. Someone said that it is used to control the oil pump speed...? My shifts are not super good but im not sure if its just a shitty box or this sensor is causing it. Without running this thing you will get errors from the tranny ecu (flashing overdrive light).

I am interested to know whether or not you actually need to run one of these things. Does anyone actually have concrete evidence?

Pictures below taken from "bolts" post on toyotacressida forums.

[Glenno52]

[QUOTE=ra65]You don't need to hook this sensor up for the box to work. I am running mine like this at the moment. There are two types, the one you have shown there (abs) and another which is for non abs cars. To swap the two you have to take off the extension housing and change the trigger wheel thing on the output shaft. Someone said that it is used to control the oil pump speed...? My shifts are not super good but im not sure if its just a shitty box or this sensor is causing it. Without running this thing you will get errors from the tranny ecu (flashing overdrive light).

I am interested to know whether or not you actually need to run one of these things. Does anyone actually have concrete evidence?



Thanks for the explanation, starting to have a better understanding of this now.
I've decided to modify my instrument cluster to take the donor speedo and use SP1 as suggested.
Just one question. What happens at 100km/h and the speedo cable fails??

[Mos]

any chance of a linky mr mos as i tried searching also and couldn't find squat,

There this:
http://www.toymods.net/forums/showthread.php?t=29811
And this:
http://www.toymods.net/forums/showth...zx81+mx83+auto
Aspects touched on in this:
http://www.toymods.net/forums/showthread.php?t=15675

I really should get off my ass write up a tech article on this (amongst other things I should be doing).. gets asked way too often

or change the search engine to pick up 2char and it may be easier.

Can't really do that as it will add every 2 character word and its location in every post on these forums into a database that will end up fricken huge.
BTW, the limit is 3 letter words, not 2, and SP2, SPD, SP1, ABS should be added to that list

Might have been able to work it out myself if only i could have found the appropriate post!
Still havn't found it yet, but hey, this is all new to me. I'll keep trying, they say you're never too old to learn! Unfortunately, i'm one of those few people left that don't know everything.

Well if I was being completely unhelpful I would've just said "search" but admittedly I could've posted the links also... (except I didn't really have time to look for them at the time)

You don't need to hook this sensor up for the box to work. I am running mine like this at the moment. There are two types, the one you have shown there (abs) and another which is for non abs cars. To swap the two you have to take off the extension housing and change the trigger wheel thing on the output shaft. Someone said that it is used to control the oil pump speed...? My shifts are not super good but im not sure if its just a shitty box or this sensor is causing it. Without running this thing you will get errors from the tranny ecu (flashing overdrive light).

This single pulse sensor will not work with a 1JZ-GTE ECU - works with a 7M. It may work with a 1G - not sure, guess you'll have to try it...

I am interested to know whether or not you actually need to run one of these things. Does anyone actually have concrete evidence?

You don't *need* it but that is only based on the fact that many people don't run one and the auto shifts at appropriate speeds. There may be aspects that don't quite work correctly but are harder to detect, especially given the fact that experience with a fully functional system with all speed sensors installed is limited. Although the limited experience does suggest there is no difference in operation with a missing SP2, but it's not something I would call concrete evidence.

Just one question. What happens at 100km/h and the speedo cable fails??

No idea .. One could draw the conclusion that the auto would shift back into first gear, but luckily the hydraulics of the auto do not engage this gear until engine power is applied enough to exceed output shaft speed (as far as I understand). But yes, running only one speed sensor does reduce the redundancy of the system.

Mos.

[Glenno52]

I would to thank everyone for their comments and help.
I now have a very basic understanding of how this system works. That's probably all i need at the moment. Don't want to overload the RAM in the brain!
Thanks again,
Glen.