Cub Cadet 900 Series Professional Shop Manual page 102

ELECTRICAL SYSTEM
RMC module
The RMC Module is in the same housing as the key
switch, and is not available separately. For the purpose
of diagnosis it is treated separately. Diagnosis of the
module with the key switch introduces too many over-
lapping variables. See Figure 7.3.
RMC Module
Key Switch
Figure 7.3
• Principle: To diagnose the module, the simplest
approach is to check all of the inputs (safety cir-
cuits) that are connected to it. If the inputs work
properly, but the RMC module does not work
properly (outputs), then the module can be
determined to be faulty. A specific procedure is
covered, following the description of the correct
operation of the RMC module.
• Working properly: The module cannot be diag-
nosed if it's function is not understood. It is
designed to work as follows: See Figure 7.4.
• When the RMC module is disarmed, the tractor
will operate as MTD tractors have historical
operated:
If reverse is engaged when the electric PTO is
ON, the PTO clutch will turn-off. On tractors with
a manual PTO the engine will turn off.
If the operator leaves the seat with the engine
running, the engine will turn off.
If the operator leaves the seat with the PTO in
the OFF position, the engine will turn-off unless
the brake is applied.
When the RMC module is armed, the tractor will
operate identically to when the module is dis-
armed.
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• When the RMC module is armed and turned-
on: The tractor will operate identically to when
the module is disarmed, except that the operator
will be able to put the transmission in reverse
with the PTO engaged and the cutting deck will
continue to run The operator may put the tractor
into and out of reverse as many times as they
wish without having to re-arm or turn-on the
module again.
1. To arm the RMC module: the operator must
turn the key switch to the REVERSE CAUTION
MODE (yellow zone), with the parking brake
released. See Figure 7.4.
LED
Indicator
Figure 7.4
• To turn the RMC module ON: The module must
first be armed, then the orange triangular button
is depressed, illuminating the red LED indicator
to indicate that it is ON. It is important that the
operator must take two actions to turn the RMC
module ON so that they do not do so inadvert-
ently. See Figure 7.4.
• The RMC module will turn-OFF and disarm if:
• The operator moves the key to any posi-
tion other than REVERSE CAUTION
MODE.
• The operator sets the parking brake.
• If the operator leaves the seat without
setting the parking brake, the engine will
turn-off. The key movement necessary to
re-start the engine will make it necessary
to re-arm and turn-on the RMC module if
the operator wishes to continue with the
ability put the tractor in reverse while the
PTO is running.