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msb

Member Since: 28 Feb 2013
Location: Leeds
Posts: 77

The change in ECU was at the same time, due to it dieing, but not related to the gearbox change.

Since Alive 'made' me a new NNN500020 ECU from my dead one and a NNNsomething else, I did wonder if the problem was in there somewhere, but it does have the same map as the old ECU did when it was a manual.

I know that that needs looking at at some point, but I was hoping to get back to where I was before the ECU and gearbox change before changing anything else.

All being well, I'll make sure the clutch circuit is complete and there is voltage to pin 35 tomorrow, and see if that sovles the problem. Hopefully, it will, if not....

5th Jan 2018 3:42pm

Martin
Site Admin

Member Since: 02 Apr 2007
Location: Hook Norton
Posts: 6478

2015 Defender 90 Puma 2.2 XS CSW Montalcino Red

Clutch switch is a ground signal, and the path is broken when the clutch pedal is pressed.

So you are looking for ground at all times at pin 35 on the black ECU connector.

If you are looking in the engine bay, look for the 2 pin connector with black and black with white stripe wires.
[/quote]

1988 90 Td5 NAS soft top

2015 D90 XS SW

5th Jan 2018 3:56pm

msb

Member Since: 28 Feb 2013
Location: Leeds
Posts: 77

Thanks Martin, that makes it easier if I have to resolve at pin 35.

5th Jan 2018 7:54pm

msb

Member Since: 28 Feb 2013
Location: Leeds
Posts: 77

So a new ground at pin 35 brought the orange engine management light on permanently (and I would say it was running a bit rough, but can’t really swear to that)…. so I put the old wire back in.

Nanocom says that the clutch switch is ON, so does that mean it thinks it’s pressed or not?

The manual says that when the clutch is in the rest position, the switch is closed, which allows a feed.. to pin 35.

As far as I can tell, everything else is as it should be:

With Cruise Control master switch (I have a toggle in the circuit) OFF:
Brake switch 1 OFF (ON when pedal pressed)
Brake switch 2 ON (ON when pedal pressed)
Clutch switch ON
Cruise Control OFF
..
Cruise Resume and Set Accelerate do nothing.

With Cruise Control master switch ON
Brake switch 1 OFF (ON when pedal pressed)
Brake switch 2 OFF (OFF when pedal pressed)
Clutch switch ON
Cruise Control ON
..
Cruise Resume ON (MOM) when pressed
Set Accelerate ON (MOM) when pressed

Driving along at 60(ish) the speedo is right, the compushift is right, and Nanocom tells me that the road speed is 95ish, so presumably this is reading in km/h, but the Set Accelerate does not Set…..

Is it still an issue with the clutch switch/pin 35?

Thanks

6th Jan 2018 3:56pm

grafty99

Member Since: 15 Aug 2012
Location: North Devon
Posts: 4784

It's hard to tell, have you had no luck finding the plug around the brake master cylinder area? 2002 90 Td5 Station Wagon
1990 Vogue SE
Triumph Tiger Explorer 1200
Td5 90 Thread http://www.defender2.net/forum/topic50767.html
Tdi 110 Thread https://www.defender2.net/forum/topic69562.html
RRC Thread http://www.defender2.net/forum/topic54492.html
Instagram http://www.instagram.com/george_grafton

7th Jan 2018 11:27pm

msb

Member Since: 28 Feb 2013
Location: Leeds
Posts: 77

Nope, can't find the clutch switch as Ashcroft have "cut, isolated and tucked the wires back in the loom."

Dave says "This is open circuit when you are off the clutch and closed when the clutch is pressed, so its now open all the time"

So similar to Martin's answer.

I don't suppose you have a nanocom and could check yours could you please grafty? Or anyone else?

Thanks

Mike

8th Jan 2018 10:07pm

grafty99

Member Since: 15 Aug 2012
Location: North Devon
Posts: 4784

I don't have a nanocom unfortunately, it's something I keep meaning to get! I don't think it is a normally open switch as when I unplug the clutch switch on mine (to improve drivability) the cruise control won't work, which would suggest it's normally closed? 2002 90 Td5 Station Wagon
1990 Vogue SE
Triumph Tiger Explorer 1200
Td5 90 Thread http://www.defender2.net/forum/topic50767.html
Tdi 110 Thread https://www.defender2.net/forum/topic69562.html
RRC Thread http://www.defender2.net/forum/topic54492.html
Instagram http://www.instagram.com/george_grafton

8th Jan 2018 10:10pm

Martin
Site Admin

Member Since: 02 Apr 2007
Location: Hook Norton
Posts: 6478

Dave's answer is the opposite of mine!

1988 90 Td5 NAS soft top

2015 D90 XS SW

8th Jan 2018 10:11pm

msb

Member Since: 28 Feb 2013
Location: Leeds
Posts: 77

Sorry, yes (been a long day) Ashcroft says the circuit should be open, you guys ( and actually me from reading the book in an earlier post) say it should be closed.

So, I should look again for the black and black/white wires in the engine bay - does anyone know where they come through the bulkhead or what else they are with? before I go randomly untaping bits of the loom...

Thanks

8th Jan 2018 10:23pm

Martin
Site Admin

Member Since: 02 Apr 2007
Location: Hook Norton
Posts: 6478

Should be near/with the brake fluid level cables I would have thought. Don't have a real Td5 here to refer to though

1988 90 Td5 NAS soft top

2015 D90 XS SW

8th Jan 2018 10:24pm

msb

Member Since: 28 Feb 2013
Location: Leeds
Posts: 77

I've just had a very quick look and the brake fluid level cables seem to be on their own and come round on the wing side, there's obviously more cables in the middle but i couldn't really see/ get at them.

There is an unused 4 way plug floating around, but no black or black/white wires....

I should be able to get a look at it in daylight on Thursday...

8th Jan 2018 10:40pm

grafty99

Member Since: 15 Aug 2012
Location: North Devon
Posts: 4784

The main loom is in conduit so any excessive tape around the loom should be a bit of a give away

2002 90 Td5 Station Wagon
1990 Vogue SE
Triumph Tiger Explorer 1200
Td5 90 Thread http://www.defender2.net/forum/topic50767.html
Tdi 110 Thread https://www.defender2.net/forum/topic69562.html
RRC Thread http://www.defender2.net/forum/topic54492.html
Instagram http://www.instagram.com/george_grafton

8th Jan 2018 10:55pm

miker

Member Since: 13 Sep 2015
Location: Surrey
Posts: 1758

I'll have a sit in mine with the nanocom Wednesday AM, and let you know what the clutch switch behaviour is!

9th Jan 2018 1:06am

ashtrans
Site Sponsor

Member Since: 08 Nov 2008
Location: Harpenden
Posts: 254

Hi Mike,

I may well be wrong about the switch, especially as grafty99 mentions the cruise doesn't work when the switch is unplugged, I now have a TD5 on the ramp which is going auto this week, I will check the switch and ask our fitter exactly where he hides the wires,

Dave Dave

10th Jan 2018 10:24pm

miker

Member Since: 13 Sep 2015
Location: Surrey
Posts: 1758

miker wrote:
I'll have a sit in mine with the nanocom Wednesday AM, and let you know what the clutch switch behaviour is!

According to nanocom:

Pedal up - Clutch Switch OFF
Pedal Down - Clutch Switch ON

11th Jan 2018 1:05am

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