Adaptation data of the 6-5 shift of the transmission 722.9 close to
the negative limit value -
设计组 27.60 Gearshift, control
有效性 All models with transmission 722.9
When evaluating the adaptation data of the control unit of the automatic transmission 722.9 it is noticeable that the cycles of the adaptation data of K1 are very far into the negative range on the 6-5 downshift.
No complaint about the 6-5 shift exists.
Current software releases have changed functionalities.
- The cycle number of K1 on the 6-5 downshift 6-5 can run far into the negative range (value down to minus 20 cycles are possible).
- As a rule the K1 data of the 2-3 shift are inconspicuous.
Do not carry out any further test/repair work.
- The negative 6-5 adaptation data alone do not give cause to repair K1. Only if the adaptation data of K1 are also on the limit values for the 2-3 shift, can a technical defective exist here.
- If other complaints exist regarding shift quality, checking and repairing must be carried out as per the valid diagnosis tree.
Power transmission / Automatic transmission / Automatic transmission - function / General
Power transmission / Automatic transmission / Automatic transmission - function / Shifts