Cub Cadet SLTX1000 Series - Manual (Page 148)

LTX Tractors
142
Key switch
The Key Switch is similar to those used in a variety of
MTD applications since 1999. The difference, in this case,
is that it is incorporated in the same housing as the RMC
module. The two items are not available separately.
See Figure 7.1.
1. In the “OFF” position, continuity can be found
between the M, G, and A1 terminals.
See Figure 7.2.
• M is connected to the magneto by a yellow
wire, G is connected to ground by a green wire,
and A1 is connected to the afterfire solenoid.
NOTE: In the “OFF” position, the magneto primary
windings are grounded, disabling the ignition sys-
tem. The afterfire solenoid loses its power from the
B terminal. This turns off the fuel supply.
NOTE: The A1 terminal is shorted to ground when the key is moved to the “OFF” position. This is a legacy fea-
ture from older tractors that had the afterfire solenoid powered directly from the alternator. This feature is not
needed on current production tractors.
• Symptom: loud “BANG” when key is turned to
the OFF position: The afterfire solenoid is not
closing, either because it is physically damaged
or the power is not being turned off. Check for
power at the solenoid. Check continuity
between G and A1 terminals. Check for no con-
tinuity between A1 and the B terminals.
NOTE: If the engine is at an idle when the key is
turned off, fuel is drawn into the engine through the
idle ports of the carburetor bypassing the fuel shut
off solenoid. The raw fuel will travel through the
engine and ignite in the muffler causing an afterfire.
• Symptom: Engine runs 3-5 seconds after key
is turned to OFF position: The afterfire solenoid
is turning off the fuel supply, but the ignition is
continuing to operate. Check continuity
between the M and G terminals in the OFF
position. Check continuity from yellow wire connection all the way to the spade terminal on the magneto.
2. In the START position, continuity can be found between B, S, and A1 terminals.
• Battery power from the B terminal is directed to the start circuit through the S terminal and to the afterfire
solenoid through A1.
• Symptom: No crank and no starter solenoid click: Power is not getting to the trigger spade on the starter
solenoid. Test for a fully charged battery, then check for power where the fused red wire with white trace
connects to the B terminal. Check for continuity between B and S terminals in START position. If power is
getting to the S terminal in the START position, the problem lies down-stream in the starter circuit. Check
continuity from the orange wire on the S terminal to the orange wire with white trace on the trigger spade
on the starter solenoid. If it is broken, trace through the brake and PTO switches.
• Symptom: No crank, solenoid click: The problem lies in the heavy-gauge side of the starter circuit: low
battery voltage, battery cables, starter cable, solenoid, or ground issue.
Figure 7.1
Key
Switch
RMC Module
Front
Back
.H\VZLWFKVFKHPDWLF
/
0
$
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6%
/
0
$
$
*
6%
/
0
$
$
*
6%
/
0
$
$
*
6%
2II 6WDUW
5XQZ50& 1RUPDOUXQ
Figure 7.2