Technical data

48
Additional shift stage
M
Shift positions/shift
procedure
Shift position 1
In position 1 the P-T-A connections of the
N331 are connected so that pressure
equalisation can take place.
Position 1 is the starting position of the N331
and enables rapid system depressurisation
after a “low range” shift procedure. Position 1
is achieved via spring force.
To prevent incorrect operation, it must be
ensured that the hydraulic pump V190 is not
activated if a fault occurs on the N331.
From ignition “ON”, the N331 is pulse-width-
modulated for the purpose of self-diagnosis
at a pulse duty factor (PDF) of approx. 5%. This
corresponds to an average current value of
approx. 40 mA.
A break in the circuit causes a change in level
at the control unit output, which is
immediately diagnosed as an error.
241_076
241_084
A
TP
Hydraulic pump
for additional
shift stage V190
Hydraulic regulator
Signal map
Pressure limiting valve
Solenoid valve for
hydraulic regulator
N331
Filter with bypass
valve