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Clutch adaptation

Category name: I want to perform a

1. Introduction:

After:
1. uploading new software in the TCU or
2. replacement of transmission or
3. replacement of TCU,
each Transmission Control Unit (TCU) has to be adapted to the CVT prior to first use.
This can be done by executing engagement actions during idle.
Once this procedure is completed, lifetime adaptation occurs automatically.

2. Pre-conditions:

These preconditions need to be met before starting the clutch adaptation procedure
- Stable engine torque and engine rotations per minute (rpm) in idle state are required. Engine adaptation needs to be completed successfully for this. For more information on engine adaptation, please refer to the Engine Control Unit (ECU) supplier’s documentation.
 Engine idle rpm max variation in P or N: ECU target value +/- 100 rpm
 Engine idle torque max variation in P or N: ECU target value +/- 4Nm
- Engine temperature at least 60°C.
- The transmission oil temperature needs to be between 30°C and 80°C.
- Switch off the air conditioning.

In case the TCU was adapted before, this means in case of
1. uploading new software in the TCU or
2. replacement of transmission,
the clutch adaptation values in the TCU needs to be reset first.
This is done using the PUNCH MLT tool or the Manufacturer Tester Tool.

3. Procedure:

Note: There is some variation on the number of cycles required for clutch adaptation. The expected number of cycles is 5 to 15.

As soon as the procedure is finished (warning lamp stop blinking), the fault code P0810 (EoL Clutch adaptation not finished) itself will become inactive and automatically deleted after 3 driving cycles.

1 interval =  warning lamp on-off-on  or 5sec



 

Troubleshooting:

Problem

Possible Cause

Action

Warning lamp still blinking after 15 or more adaptation cycles.
(Adaptation process not completed)

Transmission oil temperature is below 20°C during adaptation process.
  1.  Allow the transmission to heat up (Engine on).
  2. Restart adaptation procedure.

Transmission oil temperature exceeds 60°C during adaptation process.
  1. Allow the transmission to cool down (Engine off).
  2. Restart adaptation procedure.

Instable engine torque or instable engine rpm during adaptation process.
  1. Improve engine torque and engine rpm stability.
    Make sure engine adaptation is completed successfully.
  2. Restart adaptation procedure.

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