Automatic Transmission/Transaxle » Transmission Description (System Operation and Component Description)
Service instructions
Towing procedure
Towing is only permitted travelling forwards, at a
maximum speed of 80 km/h and for up 80 km. The
gear selector lever must be in Neutral
CAUTION: The vehicle must never be
towed backwards under any
circumstances.
Reset adaptation data
Adaptation values are stored in the software of the
TCM:
- Adaptation should be reset after an internal
component has been exchanged or the whole
transmission has been changed.
The adaptation of the transmission is reset via IDS.
Limp home mode
The TCM software contains functions which take
control of the transmission if serious faults occur.
The fault characteristic decides which strategies
are to be used.
The vehicle remains capable of restricted
operation.
The TCM strategy differentiates between four emergency modes adapted to
the fault situation
Different measures are implemented, depending
on the current gear position and driving situation
when the fault occurs:
- When a fault occurs, the TCM makes it possible
for the vehicle to maintain restricted operation.
The distance travelled should be kept as short
as possible.
- Torque limitation is activated in order to protect
the transaxle components.
- When the engine is restarted (ignition switched
off for approx. 15 seconds), the transaxle is no
longer in limp home mode. There is no longer
a fault indication on the instrument cluster, and
the MIL (malfunction indicator lamp) is off.
However, the fault remains stored in the TCM.
If the fault is still present, limp home mode is
reactivated.
- If limp home mode is reactivated after the
ignition is switched on, the option exists in
select-shift mode to pull away in 2nd gear. This
is the case unless the transaxle is in emergency
mode 4. Only 4th gear and the reverse gear are
available in this mode.
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