rojohex said:
Thanks dude, I was worried for sure!. I was being cheeky and didn't disconnect the battery, so I guess I will leave it off over night and try again tomorrow with a good test run.
Click to expand...
So you cut the cable with the batt still connected? You were being cheeky!
The ECU will take this as having been accidental and will put it on a limp home until you right the situation. So doing as above ought to sort it.
But don't take Duncehead here's word for it!
 
Haha, it's been ok so far as I have still been using it. I keep dipping in and out on lunch brakes, and kept forgetting to disconnect the battery. Hopefully leaving it off tonight will sort it in the morning when the ECU scans the system at start up.

But it shouldn't need to be reset on a computer then no?, the system will just recognise the new sensors outputs as being within range, and the codes will go hopefully?.
 
JUKE179r said:
If you have a diagnostic tester, I would highly recommend resetting the engines adaptive values./QUOTE]
Click to expand...



I stand in awe of people who can say this sort of thing, know what it means and how to do it.
I have a Foxwell but wouldn't know what to with it as far as this is concerned. OP has a nano so maybe he will?
I await the convo on this so i can learn some more.
Being naive I thought the ecu sensed for this sort of thing and adapted the values according to what it found but if the sensors aren't set up right in the first place? i thought they were set up out of the box.
Looking forward very much to learning all this here!:):):):)
 
In actuality, the RAVE manual specifies:
"Whenever a new crankshaft position sensor is fitted or the flywheel is removed, the adaptive values will have to be reset, using TestBook."

I guess I go overboard and reset the adaptive values whenever I replace a failing electrical component dealing with the engine. Be it the crankshaft position sensor, camshaft position sensor, knock sensors, O2 sensors, IAC valve, MAF, throttle body control valve, coil packs, spark plugs, or HT leads. Resetting the adaptive values won't hurt the engine as it resets the data stored in the ECU to learn a new set of parameters
 
JUKE179r said:
In actuality, the RAVE manual specifies:
"Whenever a new crankshaft position sensor is fitted or the flywheel is removed, the adaptive values will have to be reset, using TestBook."

I guess I go overboard and reset the adaptive values whenever I replace a failing electrical component dealing with the engine. Be it the crankshaft position sensor, camshaft position sensor, knock sensors, O2 sensors, IAC valve, MAF, throttle body control valve, coil packs, spark plugs, or HT leads. Resetting the adaptive values won't hurt the engine as it resets the data stored in the ECU to learn a new set of parameters
Click to expand...

Fair enough juke that makes sense, I will look into that and see if I can on my machine.
 
From the Nanocom website:
“Reset adaptive values: The adaptive values should be reset if any of the following components have been renewed or rectified: fuel injector, lambda sensor, fuel pump, fuel rail, MAFS, inlet manifold, after fixing an air leak or if a new ECU was fitted.”
 
JUKE179r said:
In actuality, the RAVE manual specifies:
"Whenever a new crankshaft position sensor is fitted or the flywheel is removed, the adaptive values will have to be reset, using TestBook."

I guess I go overboard and reset the adaptive values whenever I replace a failing electrical component dealing with the engine. Be it the crankshaft position sensor, camshaft position sensor, knock sensors, O2 sensors, IAC valve, MAF, throttle body control valve, coil packs, spark plugs, or HT leads. Resetting the adaptive values won't hurt the engine as it resets the data stored in the ECU to learn a new set of parameters
Click to expand...
Now you'll have to bear with me as I is an ignoramus when it comes to electronix, but does this mean that "resetting the adaptive values" Is like rebooting the ECU or is it simply telling it to not continue to use the values coming from the O2 sensors as if they were the old ones, cos they have changed?
I am aware this may be the same thing, only that resetting covers all sensors at once.
And doesn't disconnecting and reconnecting the batt do this anyway? Or do you have to get into the ECU to get it done?
I have changed quite a lot on my TD5 and so would like to do this with mine via my Foxwell. Any advice you can give me as to which menus to get into etc would be very gratefully received.:):):):):)
 
JUKE179r said:
From the Nanocom website:
“Reset adaptive values: The adaptive values should be reset if any of the following components have been renewed or rectified: fuel injector, lambda sensor, fuel pump, fuel rail, MAFS, inlet manifold, after fixing an air leak or if a new ECU was fitted.”
Click to expand...
Sh!t, i have done 3 of those and not reset it!:eek::(
 
Stanleysteamer said:
Now you'll have to bear with me as I is an ignoramus when it comes to electronix, but does this mean that "resetting the adaptive values" Is like rebooting the ECU or is it simply telling it to not continue to use the values coming from the O2 sensors as if they were the old ones, cos they have changed?
Click to expand...
I only know a little about how the ECU inner workings from reading online to what I've experienced with it.
To answer your question is Yes but to a certain degree of rebooting one certain area of the ECU. It clears the old stored data and begins logging new data by relearning drive cycles as you drive.

Stanleysteamer said:
And doesn't disconnecting and reconnecting the batt do this anyway? Or do you have to get into the ECU to get it done?
Click to expand...
I've read other owners doing that to the battery but I don't think anyone knows if this actually actually works or not. Could be an old wives' tale.
I've also read owners touch the negative and positive cables together for a certain amount of time after removing them from the battery posts for a reset.

Stanleysteamer said:
Any advice you can give me as to which menus to get into etc would be very gratefully received.
Click to expand...
I'll dig out my Foxwell and take a look at the D2 menus to find it and let you know.
 
Right so I can't reset values on my reader, and I still have warning codes post 4 new sensors.

I get p0134 P0135 P0154 P0155
That's no sensors recognised I believe..

I have left the battery of over night, reset the reader and I'm still getting these warnings after a few test drives. Do I need to reset the values then, as most people seem to just replace the sensors and the ECU works from the new values.
 
JUKE179r said:
I only know a little about how the ECU inner workings from reading online to what I've experienced with it.
To answer your question is Yes but to a certain degree of rebooting one certain area of the ECU. It clears the old stored data and begins logging new data by relearning drive cycles as you drive.


I've read other owners doing that to the battery but I don't think anyone knows if this actually actually works or not. Could be an old wives' tale.
I've also read owners touch the negative and positive cables together for a certain amount of time after removing them from the battery posts for a reset.


I'll dig out my Foxwell and take a look at the D2 menus to find it and let you know.
Click to expand...
Thanks mate, this is very interesting and I know that @rojohex will be very interested too!
 
Hey juke, yeah funny enough I went out and checked it along with all the connections before you posted.

So took all the connections off on the 02 sensors, cleaned them, checked and cleaned engine fuses. Disconnected the battery and re attached everything....it works!. Or at least it seems to.

The obd 2 shows the system lop closed, no trouble codes and it's not running on the ECU map but on the new 02 sensor data.

What confuses me is, obviously one or even two sensors had an issue, but why read all of them as bad, and nothing else. That's what was confusing, if it said one or two sensors that would make sense.

Anyway I will run it tonight and see what happens.

Cheers lads will update

It's up for sale soon so really needed it sorted.
 
rojohex said:
Hey juke, yeah funny enough I went out and checked it along with all the connections before you posted.

So took all the connections off on the 02 sensors, cleaned them, checked and cleaned engine fuses. Disconnected the battery and re attached everything....it works!. Or at least it seems to.

The obd 2 shows the system lop closed, no trouble codes and it's not running on the ECU map but on the new 02 sensor data.

What confuses me is, obviously one or even two sensors had an issue, but why read all of them as bad, and nothing else. That's what was confusing, if it said one or two sensors that would make sense.

Anyway I will run it tonight and see what happens.

Cheers lads will update

It's up for sale soon so really needed it sorted.
Click to expand...
Looking forward to this and to finding out if disconnecting and reconnecting the batt is what reset it all or if it was something else.
 
Soo gave it a 30 mim drive and

It drive well, the system stayed on the 02 sensors and didn't brake the loop to the ECU map, and the fuel economy even on the back roads when from 14mpg in the V8 to near 17 till I hit traffic.

So thanks lads all is well currently
 
rojohex said:
Soo gave it a 30 mim drive and

It drive well, the system stayed on the 02 sensors and didn't brake the loop to the ECU map, and the fuel economy even on the back roads when from 14mpg in the V8 to near 17 till I hit traffic.

So thanks lads all is well currently
Click to expand...
Good news!!!:):):)
 
Stanleysteamer said:
Thanks mate, this is very interesting and I know that @rojohex will be very interested too!
Click to expand...
Hey mate, sorry for the late reply. I had to borrow my Foxwell from someone who borrowed it from me 4 months ago. Lol
On the Foxwell go to 1 Engine, select 1 or 2 for Petrol or Td5 engine, 6 Special function, and select Reset Adaptions.
 
You must log in or register to reply here.

Similar threads

MAF Diver
Disco 2 Rough idle in a V8 D2a — tried MAF, O2, sparks, leads
2
Replies
35
Views
3K
marjon
marjon
S
Master Clutch Thread size
Replies
4
Views
674
sprie
S
PieterLV
Disco 2 O2 and fuel trim issues
Replies
16
Views
2K
PieterLV
PieterLV
D
Disco 4 (LR4) O2 sensor
2
Replies
21
Views
5K
Stanleysteamer
Stanleysteamer
A
L322 L322 '03; Completely new to Landy's, so a couple of questions
Replies
2
Views
832
rich28uk
rich28uk