White Outdoor LT-5 Service Manual page 37

• Symptom-RMC module will not turn-on: confirm
that the ground path (continuity to ground) to the
white wire is broken when the key switch is in
any position other than REVERSE CAUTION
MODE.
RMC module is disarmed (disabled) when the
parking brake is set. To re-arm the module, the
key is moved to another position, breaking the
ground signal, then returned to the REVERSE
CAUTION MODE, re-establishing the ground
signal. It works something like a latched relay. If
it is not possible to break the ground-path, it is
not possible to freshly establish it either, and the
RMC module will not be arm-
able.
Causes for such a condition might include a
shorted or incorrect key switch, or a chafed
white wire shorting to ground between the key
switch and the RMC module.
17.7. 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 in unit with the key switch introduces
too many over-lapping variables.
See Figure 17.7.
Figure 17.7
17.8. 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.
17.9. Working properly: The module cannot be diag-
nosed if its function is not understood. It is
designed to work as follows: See Figure 17.9.
The
• When the RMC module is disarmed, the tractor
will operate as MTD tractors have historical
operated:
If reverse is engaged when the manual PTO is
ON, the engine will turn-off.
If the operator leaves the seat with the bad run-
ning, 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, whether by the presence of
a foot on the pedal or the setting of the parking
brake.
Be aware that there are separate switches for
the brake and the parking brake latch.
Bear in mind that there represented no electric
PTO versions of the 700 series lawn tractor.
• When the RMC module is armed, the tractor
will operate identically to when the module is dis-
armed.
• 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 engine and cut-
ting deck will continue to run.
The operator may put the tractor into and out of
reverse as many times as they wish without hav-
ing to re-arm or turn-on the module again.
• To arm the RMC module: the operator must
turn the key switch to the REVERSE CAUTION
MODE (yellow zone), with the parking brake
released.
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700 SERIES LAWN TRACTORS
Figure 17.9