tunit connection

[badger]

just got hold of a tunit 2, i have been told by seller that tunit now want £68 for connection info, unless you can prove unit is less than 3 years old!
anyone got the connection info to hand?

 

[zippy656]

just ask makeitfit im sure hell have the info you are after..

or there are a few others on here that have fitted them

 

[Adz]

Pete has 1 & i'm sure a few others do :thumbs

From my homework on them there the best value for money on the diesel engine :thumbs

 

[geoffdown]

just got hold of a tunit 2, i have been told by seller that tunit now want £68 for connection info, unless you can prove unit is less than 3 years old!
anyone got the connection info to hand?

has it got 1 or 3 adjustable screws

 

[badger]

not arrived yet, i think one, as it is the tunit2.
should be here soon, will check, do they suply a wiring diagram, i think it has 4 wires?
two for supply, two i assume for ecu.

 

[lacroupade]

just got hold of a tunit 2, i have been told by seller that tunit now want £68 for connection info, unless you can prove unit is less than 3 years old!
anyone got the connection info to hand?

Ring them up and mention someone on the forum said they might help. I found them really good and we've bigged them up a lot AND bought from them. Lost my instructions sadly.....but they do vary between MkII/III and IV because of ECU and wiring changes.

Tell 'em you bought the vehicle with it fitted but someone had yanked it and the wires have come adrift or something....

 

[geoffdown]

not arrived yet, i think one, as it is the tunit2.
should be here soon, will check, do they suply a wiring diagram, i think it has 4 wires?
two for supply, two i assume for ecu.

was it from ebay and whats the item no as if its the 1 i saw saying madza b2500 its the wrong 1

 

[lacroupade]

was it from ebay and whats the item no as if its the 1 i saw saying madza b2500 its the wrong 1

If its defo a Tunut II then its the correct one, no question. :thumb2:thumb2

 

[geoffdown]

If its defo a Tunut II then its the correct one, no question. :thumb2:thumb2

well when i phoned tunit them selfs they said there is two types of tunit 2 the 1 that fits the mazda b2500 is the wrong 1 for the 2.7 tdi terrano:augie

 

[lacroupade]

well when i phoned tunit them selfs they said there is two types of tunit 2 the 1 that fits the mazda b2500 is the wrong 1 for the 2.7 tdi terrano:augie

Well I'm not doubting your conversation Geoff but its not my understanding from buying one, nor anyone elses I suspect. The Tunit II is designed to fit almost any TDi engine.

I think you might have spoken to the cleaner....or perhaps you could point out the difference between a Tunit II and, err..a Tunit II..? I stand ready to grovel in apology :thumb2

http://www.tunit.co.uk/product/productrange.php?action=II

 

[makeitfit]

I stand ready to grovel in apology :thumb2

http://www.tunit.co.uk/product/productrange.php?action=II

woop woop , I cant wait, it's been so long :augie :lol

 

[badger]

you may be right, seems to be a tunnit 2 +4 and a +6, will call and find out which it is.
would still like connection details if anyone has them?

 

[geoffdown]

Well I'm not doubting your conversation Geoff but its not my understanding from buying one, nor anyone elses I suspect. The Tunit II is designed to fit almost any TDi engine.

I think you might have spoken to the cleaner....or perhaps you could point out the difference between a Tunit II and, err..a Tunit II..? I stand ready to grovel in apology :thumb2

http://www.tunit.co.uk/product/productrange.php?action=II

to fit to all tdi engines they made 2 types 1 with just 1 adjustment screw which i think you will tell me thats the correct 1 for the 2.7tdi but for tdi in the madza b2500 and the L200 it has three adjustment screws thats what i was told.:doh maybe wrong

 

[rayf3262]

to fit to all tdi engines they made 2 types 1 with just 1 adjustment screw which i think you will tell me thats the correct 1 for the 2.7tdi but for tdi in the madza b2500 and the L200 it has three adjustment screws thats what i was told.:doh maybe wrong

As far as I can see the 2.7Tdi pump is controlled directly by the ECU. The pump has very little by way of electronics in it, save for control sleeve feedback and that's passive.

The later B2500 & L200 pumps may have embedded control electronics (like the ZD30 engine) with a CAN bus or similar to the ECU.

So it may make some sense that the TUNIT unit would need to be different for the 2 types of inj. pump.

 

[Timbo_1975]

TD27TI uses the VP37 pump which is entirely analogue and passive.

The ZD30 and many many others use the VP44 pump which has its own control unit a-top and as said uses CANbus signals to communicate with the main ecu. This was done mainly to stop people playing with the fuelling levels, and to increase levels of immobilization.

 

[lacroupade]

woop woop , I cant wait, it's been so long :augie :lol

In your dreams mush! :lol

As far as I can see the 2.7Tdi pump is controlled directly by the ECU. The pump has very little by way of electronics in it, save for control sleeve feedback and that's passive.

The later B2500 & L200 pumps may have embedded control electronics (like the ZD30 engine) with a CAN bus or similar to the ECU.

So it may make some sense that the TUNIT unit would need to be different for the 2 types of inj. pump.

Well all I'm saying is, if someone can point out what the two types of, errrr, Tunit II are then we'll all be happy won't we - I'll be apologising and we'll all know something we didn't before (which is why I harp on like this, not for my bloody benefit, despite what anyone thinks).

But at this point, the Tunit website lists only ONE solitary Tunit II with ZERO mention of sub-types. So currently I are mostly thinking I'm right....yes I know but its such a burden, if only you knew :naughty:thumb2

 

[rayf3262]

Just dug this out of another forum:

Pin 14 is fuel qty lever position signal from fip to ecu. 2.5v ign on, and same engine idling. It should increase as the fuel qty is increased.
If you attenuate it, it might 'encourage' the ecu to increase the fuelling to compensate.
It goes to pin 7 of the fip socket

Pin 39 is an output from the ecu to the above sensor, 2.5v at idle, maybe a fixed ref voltage - you'd need to monitor it.
it goes to pin 6 of the fip socket

Ecu pin 19 is ground, as is fip socket pin 5 via ecu pin 13.
and ecu pin 16 (&17) is vbat via the ecu relay, also goes to fip socket pin 4.

These 4 pins are what the Tunit connects to.

Finally, Fip skt pin 2 is fuel temp
pin 3 is fuel qty adjuster solenoid drive from ecu (pwm)

 

[lacroupade]

Just dug this out of another forum:

Pin 14 is fuel qty lever position signal from fip to ecu. 2.5v ign on, and same engine idling. It should increase as the fuel qty is increased.
If you attenuate it, it might 'encourage' the ecu to increase the fuelling to compensate.
It goes to pin 7 of the fip socket

Pin 39 is an output from the ecu to the above sensor, 2.5v at idle, maybe a fixed ref voltage - you'd need to monitor it.
it goes to pin 6 of the fip socket

Ecu pin 19 is ground, as is fip socket pin 5 via ecu pin 13.
and ecu pin 16 (&17) is vbat via the ecu relay, also goes to fip socket pin 4.

These 4 pins are what the Tunit connects to.

Finally, Fip skt pin 2 is fuel temp
pin 3 is fuel qty adjuster solenoid drive from ecu (pwm)

...assuming the functions remain constant even if the pin numbering changes - I remember from when I installed mine that, not only are the ECUs different as well as the pin numbers (between MkII and MkIII/IV) but the Tunit instructions as printed are wrong for the later model.....I spent ages trying to diagnose an apparently faulty install before phoning Tunit who enlightened me thus :doh

 

[rayf3262]

...assuming the functions remain constant even if the pin numbering changes - I remember from when I installed mine that, not only are the ECUs different as well as the pin numbers (between MkII and MkIII/IV) but the Tunit instructions as printed are wrong for the later model.....I spent ages trying to diagnose an apparently faulty install before phoning Tunit who enlightened me thus :doh

Different ECU, VP37 pump though, should just be a matter of pin number translation.

 

[lacroupade]

Different ECU, VP37 pump though, should just be a matter of pin number translation.

Ah so. Must find that bloody leaflet:doh