Snowmobile Polaris (2006 year). Manual - part 69

13.18

ELECTRICAL

IQ DETONATION ELIMINATION SENSOR 
(DET)

A detonation sensor monitors the engine and responds to 
detonation by automatically reducing the engine timing and 
adding fuel. The activated sensor reduces engine detonation 
by compensation of timing and fuel. This results in decreased 
engine RPM and performance. 

This sensor detects engine knock by converting pressure 
pulses from the engine and converting the pulses to a voltage.   
The ECU has a threshold voltage to differentiate between 
normal and damaging detonation. This system operates 
similar to existing DET system, but this system can 
compensate with timing and fuel delivery.

13.19

ELECTRICAL

DET TROUBLESHOOTING

Use this chart to determine causes and solutions for
detonation. If none of these conditions exists and the sensor
remains activated you may need to remove the sensor from the
engine and test run the unit, and if the conditions are gone you
will need to check the possible causes again. If the conditions
remain the same you may need to replace the sensor.

EFFECT OF DET

Basic concept of the detonation system is to avoid damage to 
the engine from detonation while developing the maximum 
power of the engine safely. The system starts with a 
predetermined engine perimeters. If the system senses 
detonation that is beyond a preset limit, the system retards the 
ignition timing to reduce the detonation and prevent engine 

damage. When the detonation returns to a permissible level, 
the system will incrementally advance the spark to increase the 
output of the engine in a safe manner.

SENSOR FAIL SAFE

The Detonation Elimination Technology also includes a sensor 
fail-safe system to prevent the engine from damage, when the 
sensor has failed, been disconnected or is unable to detect 
detonation. DET failure will add 10% injector duration and the 
ECU will use other sensors. The rider will experience a loss in 
power. The sensor will need to be reconnected or repaired to 
once again achieve full power. Check engine light will flash 6 
times if the sensor fails or becomes disconnected. The ECU 
will default the DET value to a set percentage and will monitor 
other sensors for reduced performance.

IQ TEMERATURE SENSOR

Resistive sensor which the resistive characteristics change due 
to temperature. The ECU uses engine coolant temperature, 
throttle opening and engine RPM information to adjust fuel 
and ignition maps to warm up or cool down the engine. 
Disconnected or Default temperature is 77.5_F (25_C).

EXHAUST TEMPERATURE SENSOR

K-Type resistive sensor with resistive characteristics that 
change due to temperature. The ECU senses this change in 
resistance and uses this information to correct fuel and/or 
timing. This sensor is difficult to measure if temperature is 

Table 13-11: DET Troubleshooting

POSSIBLE CAUSE

SOLUTION

Poor quality fuel

Replace with higher 
quality fuel

Improper engine 
modifications

Do not modify the engine

Table 13-12: IQ Temperature Sensor 

Specifications

Operating Temperature 
Range

-22_F - +248 _F (-30_C - 
120_C)

Resistance

2.4 - 2.6K

Ω@ 68_F 

(20_C)

Installation Torque

29 ft.lbs. (39.2Nm)

13.20

ELECTRICAL

below 392_F (200_C). Disconnected or Default temperature 
is 1100_F (593_C).

INTAKE AIR TEMPERATURE SENSOR

Resistive sensor with resistive characteristics that change due 
to temperature. The intake air temperature sensor is located in 
the lower air intake. The ECU senses this change in resistance 
and uses this information to correct fuel and/or timing based 
on intake air temperature. In case of circuit failure ECU goes 
to calibrated default air temperature. Default temperature is -
20_F (-28_C).

BAROMETRIC PRESSURE SENSOR

Internal ECU sensor that provides ECU with Altitude 
information to adjust fuel and ignition. This sensor is located 
in side the ECU and is not serviceable. Default setting is 28.74 
inches of mercury.

CRANKSHAFT POSITION SENSOR (CPS)

The 5 tooth crank position sensor (A) picks up all 5 flywheel 
teeth (C).

The 2 tooth crank position sensor (B) picks up 2 off set 
flywheel teeth (D).

Both crank position sensors will have a gap (E) to the 
flywheel pick up of.035" (.90mm).

These sensors must be in the correct position or the engine 
will not run as expected. A sheared flywheel key will cause 
the engine to not start or kill if running.

The 2 tooth pick up detects the crank angle and obtains 
minimal information of the crank angle when control enters 
into limp home mode.

5 tooth pickup is to obtain the following information in 
combination with the 2 tooth pickup.

• Judge direction of rotation (forward and backward)

• Ignition advance angle control

• Injector drive angle control 

• Excess advance ignition control at reverse

Table 13-13: Exhaust Temperature Sensor 

Specifications

Resistance 

Values

2.3M

Ω @ 392_F (200_C) - 76Ω @ 

1652_F (900_C)

Table 13-14: Air Temperature Sensor 

Specifications

Operating Temperature 

Range

-22 _F - +248 _F (-30_C - 

120_C)

Resistance

77_F(25_C) 9.7 - 10.3 K

Ω

13.21

ELECTRICAL

SPEED SENSOR

This is a hall effect sensor that measures the speed of the drive 
shaft to give you the speed of the track.

Table 13-15: Speed Sensor Testing

PIN #

COLOR

ITEM

VALUE

A

Red

Gauge

Power 5 volts (powered bu 
gauge)

B

White

Speed Signal to Gauge

Checking with Hall sensor

C

Black

Signal to Ground

Continuity to ground