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9850064 R03 - 2021 650 / 850 Matryx Trail Performance / Crossover Snowmobile Service Manual
© Copyright Polaris Inc.
10.95
HAND / THUMB WARMERS
SMARTWARMERS DIAGNOSTIC OVERVIEW
WHAT IS THE SMARTWARMERS SYSTEM?
SmartWarmers is a programmable hand and thumb warmer system exclusively available on Polaris Matryx
snowmobiles. The heating elements build heat quickly and maintain a customized temperature regardless of external
factors like ambient temperature and cross winds. To achieve a customized level of comfort, riders can independently
set the thumb heating element and grip heating elements to his/her preferred setting ranging from 68 - 158 °F (20 - 70
°C).
SmartWarmers is available on model year 2021 Matryx platform snowmobiles equipped with either the 7S Display
Integrated with Ride Command or Message Center (Standard) display.
HOW DOES SMARTWARMERS WORK?
SmartWarmers can deliver temperature customization through three critical components: the interactive display, the
left-hand control (LHC), and the heating elements.
The interactive display allows the user to customize the low, medium, and high settings for the grips and thumb heating
element. When the SmartWarmers system is turned on, the display communicates the set temperature via CAN BUS
to the LHC. The LHC will then supply power to each heating element until the set temperature is met. The LHC
recognizes when each heating element meets the set temperature by determining its resistance value, which changes
dependent on surface temperature.
7S Display
Display communicates user-
defined temperature based on
mode selected via CAN to left-
hand control (LHC)
→
Left-Hand Control
Sends power to heating
element to selected
temperature
→
Heating Element
Resistance changes with
heating element temperature
SMARTWARMERS CALIBRATION
Because each heating element has a unique resistance value within a tolerance range, a calibration process is
required to associate the heater element resistance with its surface temperature.
If any component of the SmartWarmers system has been replaced, the system MUST be calibrated using Digital
Wrench. If the system is not calibrated, the change in resistance between the old and new parts could result in
temperature variation from one heating element to another, and/or the system could experience overheat faults.
Example: One grip heating element could equal 3.0 ohms at 68 °F (20 °C) and another could equal 3.5 ohms at 68 °F
(20 °C), but both would be within specification.
RESISTANCE CHECKS
CIRCUIT (WIRE COLOR)
NOMINAL RESISTANCE @ ROOM TEMP. 68 °F (20 °
C)
Yellow to Grey (LH grip heating element)
3.3 ohms ± 10%
Blue to Brown (RH grip heating element)
White to Green (Thumb heating element)
14.0 ohms ± 10%
BATTERY / ELECTRICAL
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