Adaptive Values Reset

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Originally Posted by Collins

Apologies for the delay in responding.

The Drive Cycles Information can be found at;
Engine Management Systems - V8 Section 18-2-58 to 18 -2-59

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Thanks, I should have mentioned it's a TD5. Does the info quoted still apply?

Cheers.

Quote:

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Originally Posted by Hoges

some thoughts:
Do you have a "Sport" mode on the transmission?... = higher up/down shift points
If so, does it make any difference when you engage/disengage sport mode?
Is the "S" light on the instrument panel operating to let you know it's in sport mode? if the bulb has failed it may be in Sport mode but you are not aware of this...

If you are sure that the transmission button is not in "Sport" mode, try driving with a very light foot from standing start ...consistently... the adaptive system will pick up and store this info and should drop the shift point... see also http://www.nanocom-diagnostics.com/d...1015658551.pdf ...the top paragraph talks about the Disco 2 auto transmission ECU "learning" from the driver's "driving style" ...

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Going by the info on the bottom of the pdf, I think I'll leave it alone as no components have been renewed.

"Reset adaptive values: This function causes the GS887X ECU to reset all adaptive values that
the ECU has learned from the vehicle. The adaptations should be reset if the gearbox mechanical
components or gearbox ECU have been renewed or rectified."

As above, should only really be reset when replaced. There's a "wear" algorithm based on the input feedback the Auto ECU receives. This adapts for wear in the system over time. Resetting it makes it think that it's a new box and this may negatively impact on longevity as pressures and shifting may be altered. Who knows what effects this could have.

Thanks, I should have mentioned it's a TD5. Does the info quoted still apply?

No, applicable to V8 only

Resetting the auto is resetting the auto irrespective of the engine. The only drive cycles I'm aware of in RAVE are the line pressure tests for function.

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Originally Posted by clubagreenie

Resetting the auto is resetting the auto irrespective of the engine. The only drive cycles I'm aware of in RAVE are the line pressure tests for function.

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I would suggest that you have a look at the V8 Engine Management section of RAVE. It is quite apparent that the Drive Cycles, A, B, C, D E & F apply to more than line pressure test functions.

The Drive Cycles are conducted to reset certain adaptions, enable recording of data and to ensure that DTC's are fully cleared after servicing

turbopsi, all this does is reset the shift points and the logged valve pressure readings.
If you reset it, the ECU will go back into a learn mode and log a new set of parameters according to how you drive it and the boxes current condition and apply shift parameters accordingly.
Initially you will feel a very slight change in the shifts but it will in most cases feel a lot smoother and after a couple of days its all back to normal.
Worst case is you won't notice anything at all.

Good idea to do it at every fluid change also.

Won't do any damage at all.