Missing ECU Wires

[Essential]

Ok, Dont know if this is the rigth section however i NEVER get replys to my posts in the other sections, so considering this section has the most people, i'll post here.

According the the ECU Diagram on rb20det.com and looking at my ECU

it appears, the following pinouts have no wires.

*** Edited as I was reading my ECU wrong ***

5 engine. A/T control input signal (bt1)

6 Sub electrical fan relay (engine temp switch)

14 engine. a/t control input sigal (bt2)

15 engine. a/t control input sigal (bt3)

56 Throttle sensor output signal

Anyone able the shed some light on this and if the wires are ment to be missing,

also if it's a bad thing that these wires arn't in there.

Thanks

Essential

[strutto]

Your looking at the ECU / harness the wrong way around...

6 = 25 N/A

56 = 113 N/A

15 = 36 N/A

16 = 35 N/A

It's a mirror image of what you have listed...

[Essential]

Ok, I went and wrote it all down again. First off let me explain..

Today i decided to check out what ECU I had as it was acting like a non stock ecu.

My Ecu Is: 23710-11U00 MEC R212 B 2615

I tried looking this information up on

http://www.grid.co.jp/DAT/unitdat.txt

However i did not manage to find my EXACT ECU, howeve rI managed to find similar ones.

Therefore I decided to 'Google it' and the only result returned was..

http://www.hks-power.co.jp/products/electr...on_sz_data.html

However I have no Idea what this website is trying to tell me.

Next i went and checked each wire on me ECU and noticed a few were missing, (a few were cut so I managed to re-join them, not sure what ones exactly though)

Anyway it appears after consulting the ECU guide on RB20DET.com it appears the following wires are missing from my ECU

5 engine. A/T control input signal (bt1)

6 Sub electrical fan relay (engine temp switch)

14 engine. a/t control input sigal (bt2)

15 engine. a/t control input sigal (bt3)

56 Throttle sensor output signal

can anyone explain to me if this is normal, and why it is missing etc.

Basically I want to know what each Pin-Out does and if i'm in danager of anything bad.

Thanks

PS - Hope I have read it the correct way up this time!

[browny]

6 Sub electrical fan relay (engine temp switch)

My engine diagrams don't agree with this and 6 is listed as unused. The aux fan on my engine is controlled using a sensor plugged into the radiator and there doesn't appear to be any ecu control. Pin 6 for a gtr ecu is as you describe so maybe there is an error in the info you are reading this from?

5 engine. A/T control input signal (bt1)

14 engine. a/t control input sigal (bt2)  

15 engine. a/t control input sigal (bt3)

56 Throttle sensor output signal

All these are for auto's.

[Essential]

im just reading these off the following files..

[browny]

I know. There are several differences between that file and what is indicated in my service manual.

I have yet to find a single difference between my literature and my wiring loom so my guess is that the file above has a couple of small errors. Since the GTR pinout has exactly that definition for pin 6 I think it might be a simple error of mixing up gtr and gtst info.

Otherwise Nissan might have released several slightly different looms/ecu's just to complicate things.

[Essential]

Looks like i need to get my hands on a genuine r32 rb20det service manual .. which i must admit is impossible as i dont think there is one

[blind_elk]

according to my JPNZ manual, the following pins are not used on the RB20DE(T):

6 8 17 25 33 34 35 36 37 39 40 55 102 106 111 113

The GT-R uses pin 6, as mentioned previously. It also uses 34 35 36 for the 2nd AFM

[Essential]

Well the following pin outs are missing wires on my ECU

5 6 8 25 14 15 17 33 34 35 36 37 39 40 55 56 102 106 111 113

[Essential]

So comparing that to your chart it appears the the following ports whould have wires in them..

5 14 15 56

And going of MY chart these ports represent..

5 engine. A/T control input signal (bt1)

14 engine. a/t control input sigal (bt2)

15 engine. a/t control input sigal (bt3)

56 Throttle sensor output signal

And according to 'Browny' these 4 pin outs SHOULD be empty if your running a MANUAL rb20det

Therefore in the end my ECU isn't actually missing any wires at all and is completely normal?

Correct ?

Thanks for your help so far guys

[Sydneykid]

5 engine. A/T control input signal (bt1)

6 Sub electrical fan relay (engine temp switch)

14 engine. a/t control input sigal (bt2)  

15 engine. a/t control input sigal (bt3)

56 Throttle sensor output signal  

A/T = Automatic transmission, so if you have a manual you shouldn't have wiring for #5, #6,,#14, or #15. If I remember rightly #56 is also for the A/T as it tells the auto ECU how much throttle you have on. I have seen #6 wired, but it was either on an auto or a GTS4.

Hope that helps :burnout:

[Essential]

Well Ill just assume everything is fine with my wires afetr all that, ill go have a look at those wires that were cut in a minutue and let you know which ones were cut.

Im still a bit locast about which ECU i have, ad my serial numbers dont match up anywhere as mentioned above

can someone shed some light on why this is?

Thanks

Essential

[Essential]

Ok I went and had a look at all the Modified wires on my Ecu..

The following wires were cut and i joined them back together.

25 58 59

Any Reason why these were cut?

Now the following wires i noticed had been tapped in to, what i mean by this is they have 2 wires that are taped into the one wire coming out of the ECU

101 7 53

I think therse wires lead over to my HKS Type 1 Turbo timer, however it does not read my revs/speed correctly

The following wire looked like it was clear with copper inside

29

Guessing thats normal?

Having just said that, I have managed to translate the following

7 Tacometeter speed signal

53 Vehicle speed sensor

- However the readout on my Turbo timer does not work/ display correctly

29 Exhaust gas sensor

- Would explain why that wire looked copper, so im guessing its normal

58 Battery power supply

59 Control unit power supply

- Not sure what the deal is with these, my turbo timer displays my 'Voltage' and it seems correct so maybe one or 2 of these wires lead to my Turbotimer?

101 Injector #1

- No idea why a wire is tapped into this??

Thanks for taking them time out to help me with this

[browny]

From memory 7 is the tacho output pulse. I'll have to look the others up.

[Essential]

Ok, I had a quick look again and it appears wires..

101 7 53

- all lead back to near my turbo timer, they then connect into a big bundle of wires which contains wires for my alarm i think. and possibly a relay.

Whats confused me is if all these wires go back to my turbotimer then why doesnt the Rev and speed feature display correctly on my turbo timer?

[browny]

25 - shown in my manual as unused

Al the others are as you have indicated.

Maybe whoever installed the RSM wired it incorrectly.

[Essential]

Lol maybe i need to check where 25 leads to, proberly wont get a chance till monday