[From the service manual...
The CCU performs two important functions on the
snowmobile. Its main function is to distribute regulated
DC power to the chassis electrical systems. Its
other function is to control the forward/reverse shifting
of the ACT drive to ensure safe operation.
The CCU has two DC outputs used for lighting circuits.
Both outputs have a circuit breaker (self resetting
devices) which protects components from overcurrent
and short circuit situations. If a system stops
working, it is likely a short has occurred and the system
has shut itself off much like a fuse will blow if a
circuit is shorted to ground. However, unlike a fuse if
the short is resolved, the CCU will reset the output and
the system will return to normal operation.
The first output, labeled the High Power DC Output,
supplies power for the headlights and handwarmers.
This output is on only while the engine is running.
This output is turned off during shifting to allow maximum
power transfer to the ACT drive.
The second output, labeled the Low Power DC Output,
supplies power to the gauge, speed sensor, taillight,
accessory plugs, and APV servomotor via the Engine
Control Unit. This output is on only while the engine is
running. It is not turned off during shifting.
CCU Diagnostic Codes
Code Trouble Cause
CCU 32 High power DC output
over current.
Headlight and Hand Warmer
(Red/Black) circuit current
greater than 20 Amps.
CCU 33 High power DC output
shorted.
Headlight and Hand Warmer
(Red/Black) circuit shorted to
ground.
CCU 34 Low power DC output
over current.
Gauge, Taillight, and APV
Servo Power (Red/Blue)
circuit current greater than
20 Amps.
CCU 35 Low power DC output
shorted.
Gauge, Taillight, and APV
Servo Power (Red/Blue)
circuit shorted to ground.
CCU 37 System over voltage. Spike in battery voltage -
excessive gear case shifting.
CCU 38 Gear shift actuator
failure.
Wires to reverse actuator
damaged or shorted to
ground.
CCU 42 Tachometer input failure
(engine running - no
tachometer signal
present).
Tachometer signal wire
shorted to ground.
CCU 43 Gear position switch
failure.
Gear position switch
damaged or unplugged -
reverse actuator not
working correctly.
CCU 44 CCU over temperature. Internal CCU temperature
over 105° C (221° F).