Malfunction Indication - Maserati Quattroporte Automatic Owner's Manual

M139_UM_ing.book Page 162 Friday, September 5, 2008 8:19 AM
Hot-mode strategy
In the event that the engine oil or
coolant temperature is too high or
both, the gearbox system reduces the
maximum engine speed to 4000 RPM.
Therefore, upshifting will occur at this
limit.
This strategy does not manage
downhill driving, so as to always have
the efficiency of engine braking
together with the standard braking
system.
MSP system operations
In order to prevent unstable driving
conditions, the MSP system may
request the gearbox system to
5
deactivate gearshifting. The system
handles this request depending on the
gear engaged and on the RPM, and
decides whether to accept it or not.
Cruise Control
With cruise control the gearbox system
selects such settings as to provide
enhanced comfort and fuel-economy.
162
Electronic automatic gearbox

Malfunction indication

The malfunctions indicated are
attributable to two causes:
– Gearbox failure
– Gearbox oil temperature too high
In both cases, the warning light
illuminates.
Gearbox failure
A gearbox failure is indicated on the
display by the message "Check
transmission go to dealer". While
driving, the ECU that controls the
device sets an emergency program.
WARNING: In these conditions, we
recommended that you stop the
vehicle and turn off the engine for at
least one minute. When restarting the
engine, the autodiagnostic system may
cancel the malfunction, which will in
any case be recorded by the ECU.
In failure conditions, the gearshift
lever A can still be shifted to positions
R, N and D.
When shifting to D, only a few gears
will be available for shifting,
depending on the malfunction found.
WARNING: If a gearbox failure is
signalled, take your vehicle to the
nearest Maserati Service Network
Centre as soon as possible to have the
problem corrected.
If the failure is signalled when the
engine is started, it means that the
gearbox ECU detected a fault when
the vehicle was last used. Also in this
case, take your vehicle to the nearest
Maserati Service Network Centre to
have the gearbox checked.
When the gearbox is
malfunctioning, drive very
carefully considering that
vehicle performance is reduced. In
addition, the reverse gear safety lock
may not be active: absolutely do not
shift the lever to R when the vehicle is
moving.