geartronic passage en 2 temps

[stef]

J'ai lu sur un forum anglo saxon qu'il était possible que si la batterie était débranchée assez longtemps ( > 12h ) , le TCM se ré-initialisait . Et donc qu'il fallait lui faire un apprentissage avec une procédure sous VADIS ...
Voici la source , pour une AW50/55 :
"Volvo Adaptive Learn Procedure

Performing the adaptive learn procedure on a Volvo requires a VADIS (Volvo factory scanner)
to put the TCM in the “Control Module Adaptation” mode. Some vehicles do not
have this function available and will need to have the TCM software reflashed so that the
control module adaptation mode will work. The TCM will not go into adaptation mode
unless the transmission oil temperature is between 150°F and 230°F. The TCM will
not adapt in Geartronic or Winter Mode.

While the TCM is in the Adaptation Mode, the orange triangle in the center of the instrument
cluster will flash when the adaptation has been completed for a particular shift.

To adapt the up shifts:
• Use the “D” position. Accelerate from a stop at a light throttle, about 1400 rpm,
through the gears to 4th, keeping the throttle steady. Come to a stop and repeat until the
orange triangle flashes after each shift.

• Next, accelerate from a stop though all five gears at a throttle opening of about 1800
rpm, keeping the throttle steady. Come to a stop and repeat until the orange triangle
flashes after each shift.

• Finally, accelerate through the gears at a throttle opening of 2500 rpm. Repeat until
the orange triangle flashes after each shift.

To adapt the down shifts:
• Use “D” position. While driving at about 45 mph in 5th gear release the throttle and
lightly brake to a stop. Repeat this procedure until the orange triangle flashes after
each downshift.

To adapt the garage shifts:
• With the engine idling and the brake pedal depressed, shift to “N” and wait 5 seconds,
now shift to “R”, wait 5 seconds then shift to “N”. Repeat this procedure until the orange
triangle flashes.

• Repeat the above procedure for “D”.
To Adapt the Neutral Control Function:
Note: Not every Volvo has the Neutral Control Function.

• While driving at about 5 mph in “D”, slowly come to a stop. Repeat this procedure until
the orange triangle flashes.

• With the engine idling and the brake pedal depressed, move the shifter to “D” and wait
about 25 seconds for the orange triangle to flash. This lets you know that the TCM is
ready to adapt. Once the flash is seen, release the brake and allow the vehicle to
crawl forward. Repeat this procedure until the orange triangle flashes just after the
brake pedal is released.

Once all of the adapts have been learned, turn off the ignition and the TCM will exit
the adaptation mode."

Peut être une piste de ce coté ..?