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9850064 R03 - 2021 650 / 850 Matryx Trail Performance / Crossover Snowmobile Service Manual
© Copyright Polaris Inc.
POLARIS ELECTRONIC REVERSE CONTROL (PERC)
PERC OVERVIEW
The operation of the electronic reverse system is
achieved by automatically reversing the engine rotation
with a push of a button. When in reverse, an indicator
light will flash, indicating the engine is in the reverse
mode. The design of the clutches is matched to the
specifications that will allow the backward rotation of the
engine to move the sled in reverse. Getting back to
forward is as easy as pushing the button again.
PERC OPERATION
WARNING
Reverse operation, even at low speeds, may cause loss
of control, resulting in serious injury or death. To avoid
loss of control, always: LOOK BEHIND BEFORE AND
WHILE BACKING.AVOID SHARP TURNS. SHIFT TO
OR FROM REVERSE ONLY WHEN STOPPED.
APPLY THROTTLE SLOWLY.
CAUTION
To avoid personal injury and/or engine damage, do not
operate the electric start or recoil while engine is
running.
1. Ensure that the vehicle is stopped and the engine is
warmed up and running at idle.
NOTICE
The PERC system will only engage in reverse if the
engine is below 3000 RPM. If engine is above 3000
RPM the system cannot be activated
.
2. Ensure that the path behind you is clear.
3. Push and hold the yellow reverse button on the left
hand control for 1 second and then release the
button. The reverse light on the instrument panel will
flash when engine is in reverse motion.
NOTICE
The engine will automatically reduce RPM and it will
reverse the rotation of the engine when the RPM is at
the lowest RPM point
.
4. Slowly apply throttle until the sled starts to move in
reverse, and carefully direct the sled in the direction
that you want.
NOTICE
Maximum RPM in reverse is 5,000 – 6,000 RPM.
If the engine stops running or is shut off while in
reverse. The engine will start in forward gear.
PERC FORWARD OPERATION
NOTICE
When servicing clutches, ensure that the vehicle is in
forward gear. If not damage to the driven clutch may
occur when removing the belt
.
If unit was operated in reverse, ensure that the path
ahead is clear, and push and hold the reverse button for
1 second and then release the button. The engine will
now automatically change direction form reverse to
forward and the reverse light on the instrument panel will
stop flashing.
PERC TROUBLESHOOTING NOTES
• Max RPM for shifting into reverse = 3,000 RPM
• Max RPM for operating in reverse = 5,000 – 6,000
RPM
• Engine must first reach 900 RPM at start up before the
reverse system can be used. The system works
between 900 and 3,000 RPM.
• If the button is pushed above 3,000 RPM the system is
bypassed and nothing will happen.
• Flashing light on the instrument panel indicates that
the system is in reverse. On Cleanfire models this is
automatically done through the engine controller unit
(ECU).
• If engine is shut off in forward or reverse gear, the
engine when started will automatically be in forward
gear.
• When servicing the driven clutch, ensure that the
vehicle is in the forward gear.
• On Cleanfire models the PERC system will not operate
if the TPS is out of adjustment or the 5 tooth CPS
signal is interrupted or broken. Verify IDLE MODE =
ACTIVE on the DATA GRID display using Digital
Wrench and PERC / REVERSE switches to ACTIVE
when the PERC button is pressed.
