Learning function for the gearbox
This function resets the gearbox adaptation values, performs learning of the gear positions and program the clutch biting point.
The vehicle needs to be started and driven during the function.
The function consist of 4 steps.
Step 1: Resets the adaptation memory.
Step 2: Learning of the gear positions.
Step 3: Learning of the clutch biting point.
Step 4: Driving cycle on a road.
Preconditions for the test:
Battery voltage above 12 V.
Possibility to drive on a road, to complete step 4 in the function.
Correctly adjusted gear shift according to the vehicle's service manual.
Start the function and follow the instructions in the program.
After successful execution, let the engine idle in neutral position (N) for about 20 minutes to stabilize the clutch temperature.
The last part of the function (step 4), consists of a driving cycle to program the clutch transferability.
The programming must be performed during driving in automatic mode (A), without turning off the engine.
Start at 1st gear in automatic mode (A), and accelerate quickly until 2nd gear is engaged.
Brake the car to a standstill.
Repeat point 5-6, 4 times.
Then wait 5 minutes in neutral mode (N), without turning off the engine.
Repeat the procedure 3 times (point 5-8).
Drive the car on a road and shift through all gears in automatic mode (A).
Check that there is no hesitation or jerks between the shifts, especially between gear 2-3.
If OK, turn off the ignition for 60 seconds to store the adaptation values.
Perform a driving test on a road to check the learning.
If not OK, wait for 10 minutes in neutral mode (N), without turning off the engine.
Start the driving cycle from the beginning.
If the result is not improved, the whole function should be restarted from the beginning.