Snowmobile Polaris 2006 - 2007 FS / FST. Instruction - part 68

 

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Snowmobile Polaris 2006 - 2007 FS / FST. Instruction - part 68

 

 

12.27

Chassis Electrical System

12

Rev. 1 07/2006

Mode / Set Switch Circuit (Non-ACE)

NOTE: Reference the schematics in the Wiring
Diagram chapter for M-10 ACE circuits. 

Vehicle Speed Sensor Circuit

Power-Up / Power-Down Sequence Overview

The following is an outline of the sequence of events that occur
when the operator attempts to start and stop the engine on all FS

12.28

Chassis Electrical System

Rev. 1 07/2006

and FST snowmobiles. These sequences are critical to the
starting and stopping process and should be used in any
troubleshooting methods.

1.

Operator moves the key to the “START” position. This
action supplies battery voltage to the ECU (PIN 206). In
order for the starter motor to engage, the safety slap switch
must be in the “UP” position. If the safety slap switch is in
the “DOWN” position, the ECU will not engage the starter
motor.

2.

With the key turned to “START” and the safety slap switch
in the “UP” position, the ECU will activate the EFI relay
via PIN 322. Power to the EFI relay is supplied directly
from the battery.

3.

The ECU will then activate the ignition relay, fuel pump
relay, and the ground side of the start relay.

4.

The start relay provides the ground path for the starter
motor solenoid. The engine should turnover and start at this
point.

5.

The chassis relay is activated once the ECU determines the
engine can maintain sufficient engine RPM to compensate
for the increased electrical loads. 

6.

The chassis relay supplies power to the lights, power points,

and activates the alternator charge field coils. If the chassis
relay does not activate, the alternator will not supply
voltage to charge the battery or power the electrical system.

7.

The CAC fan relay (FST Only) is turned on and off as
determined by the ECU.

8.

To turn off the engine, the operator must either turn the key
to the “OFF” position, push the safety slap switch down, or
remove the optional tether.

12.29

Chassis Electrical System

12

Rev. 1 07/2006

9.

When the operator commands the ECU to stop the engine,
the ECU opens the ignition coil, then cuts power to the
ignition coils, fuel injectors, and fuel pump.

10. The ECU then shuts off the chassis relay, removing power

from the lights, power points and turning the alternator off.

11. The ECU then performs an internal shut-down sequence

which can last up to two minutes. If the ECU recognizes the
Digital Wrench diagnostic software during the shut-down
sequence, the ECU will remain powered-up for
approximately ten minutes.

Power-Up / Power-Down Troubleshooting

1.

Verify the battery is in good condition and charged. During
engine turnover, the battery voltage should not drop below
11 Vdc. 

2.

Verify the fusible links, fuses, circuit breakers, and relays
are in good condition and working properly. Replace a
blown fuse, relay, or fusible link with the specified part. Do
not substitute a fuse with a higher-amp-rated fuse.

3.

Verify all ground wires are connected to the engine/chassis
and to the battery. Test the continuity between ground wires
and the engine/chassis. Resistance should equal
approximately 0 (zero) ohms.

4.

Verify the ignition key switch works properly.

5.

Verify the safety slap switch works properly.

6.

Verify the throttle lever (flipper) works properly.

7.

Check all sensor, and electrical component connections.
Connections must be clean, tight and free from damage.

8.

Verify the fuel tank is at least 1/8 to 1/4 full.

9.

The ECU can be “reset” by:

• Push the safety slap switch down.

• Insert the ignition key, then turn to the “START” 

position. Release key.

• Remove the EFI relay from the relay panel.

• Turn the Ignition key to the “OFF” position. Install the 

EFI relay.

12.30

Chassis Electrical System

Rev. 1 07/2006

2007 SELECTED HARNESS 
ROUTINGS

Cylinder Head Routings

Crankcase / Throttle Body Routings

 

 

 

 

 

 

 

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