Snowmobile Polaris 2006 - 2007 FS / FST. Manual - part 63

12.7

Chassis Electrical System

12

Rev. 1 07/2006

Always note the orientation of the wires connected to the diode.
Always connect ground wires to the NEGATIVE terminal on the
diode. The POSITIVE terminal has a (+) mark.

External Relays (Relays Located Outside of 

the Main Relay Panel)

The fuel pump and charge air cooler (intercooler) relays are not
located within the main relay panel. These two relays are located
on the main wiring harness and secured with tape.

Reference the illustration for wire color identification purposes.

12.8

Chassis Electrical System

Rev. 1 07/2006

EFI / Ignition Relay Circuit

12.9

Chassis Electrical System

12

Rev. 1 07/2006

EFI Relay Circuit

The EFI relay is the primary or “main” relay. If the EFI relay
fails, the ECU will never power-up and the engine will not start.

When closed by the ECU, the EFI relay supplies battery voltage
to the “EFI Bus” circuits. These circuits include:

• 20A Ignition Relay Power

• 20A EFI System Power

• 20A Lambda / MFD Power

Ignition Relay Control Circuit

The Ignition Relay’s two functions are to supply battery voltage
to the ECU’s ignition system and each ignition coil.

The ECU controls the relay by grounding the relay via the
ignition relay control circuit. Ignition relay activation can only
occur when the safety slap switch is in the “pulled” or “UP”
position.

12.10

Chassis Electrical System

Rev. 1 07/2006

Ignition Relay Power Circuit

When the ignition relay is closed by the ECU, fuse-protected
battery voltage is supplied to the ECU and each ignition coil via
the RED/WHT circuit. An ignition diode is installed on the
RED/WHT circuit to prevent voltage back-feeding during
ignition power-up and shut-down.