programming a TCM module for a x308 XJR
Senior Member
Joined: Sep 2010
Posts: 173
Likes: 15
From: Netherlands
I did a succesfull "re-learning" on my '99 XJR some days ago (Mercedes trans).
My issue was upshifting on low rpm's , and only downshifting with full trottle while overtaking (normal mode).
(EDIT: I did not reset anything)
- First accelerate with light (constant)throttle in "2" till 2400rpm , release throttle and back to about 1000rpm.
Repeat minimal 4 times.
- Do the same in "3" and "4" . Try to stay in 3rd gear when in "3" , same in "4".
- Stop the car and let it idle in "P" for min. 10 minutes. (storing)
This did the trick for me , the car is now upshifting on higher RPM's , and feels fast again.
The 10min. idle storing sequence is tricky , what if you are in a traffic jam for more than 10min. ?
Or as i did , an engine flush with 20min. on high idle ....
My issue was upshifting on low rpm's , and only downshifting with full trottle while overtaking (normal mode).
(EDIT: I did not reset anything)
- First accelerate with light (constant)throttle in "2" till 2400rpm , release throttle and back to about 1000rpm.
Repeat minimal 4 times.
- Do the same in "3" and "4" . Try to stay in 3rd gear when in "3" , same in "4".
- Stop the car and let it idle in "P" for min. 10 minutes. (storing)
This did the trick for me , the car is now upshifting on higher RPM's , and feels fast again.
The 10min. idle storing sequence is tricky , what if you are in a traffic jam for more than 10min. ?
Or as i did , an engine flush with 20min. on high idle ....
Veteran Member
Joined: Oct 2008
Posts: 4,878
Likes: 1,424
From: Sunny Southport UK
I did a succesfull "re-learning" on my '99 XJR some days ago (Mercedes trans).
My issue was upshifting on low rpm's , and only downshifting with full trottle while overtaking (normal mode).
(EDIT: I did not reset anything)
- First accelerate with light (constant)throttle in "2" till 2400rpm , release throttle and back to about 1000rpm.
Repeat minimal 4 times.
- Do the same in "3" and "4" . Try to stay in 3rd gear when in "3" , same in "4".
- Stop the car and let it idle in "P" for min. 10 minutes. (storing)
This did the trick for me , the car is now upshifting on higher RPM's , and feels fast again.
The 10min. idle storing sequence is tricky , what if you are in a traffic jam for more than 10min. ?
Or as i did , an engine flush with 20min. on high idle ....
My issue was upshifting on low rpm's , and only downshifting with full trottle while overtaking (normal mode).
(EDIT: I did not reset anything)
- First accelerate with light (constant)throttle in "2" till 2400rpm , release throttle and back to about 1000rpm.
Repeat minimal 4 times.
- Do the same in "3" and "4" . Try to stay in 3rd gear when in "3" , same in "4".
- Stop the car and let it idle in "P" for min. 10 minutes. (storing)
This did the trick for me , the car is now upshifting on higher RPM's , and feels fast again.
The 10min. idle storing sequence is tricky , what if you are in a traffic jam for more than 10min. ?
Or as i did , an engine flush with 20min. on high idle ....
Veteran Member
Joined: Feb 2011
Posts: 9,733
Likes: 2,201
From: on-the-edge
Maybe an adaption of the TSB attached to post #17?
The 10 minutes is critical unless you have IDS.
The 10 minutes is critical unless you have IDS.
Last edited by plums; Jan 28, 2012 at 04:30 PM.
Senior Member
Joined: Sep 2010
Posts: 173
Likes: 15
From: Netherlands
I posted a PDF with 722.6 adaption info in post #49 of this thread :
https://www.jaguarforums.com/forum/x...d-58651/page3/
I used the bottom part of the discribed info.
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