All Wheel Drive (Awd) And Adc Coils; Operation Overview; Diagnosing System Failures - Polaris Sportsman 850 Service Manual

ELECTRICAL

ALL WHEEL DRIVE (AWD) AND ADC COILS

OPERATION OVERVIEW

• Key on power is supplied to the AWD hub coil from terminal 23 in the fuse block, on the RED/GREEN wire. The
AWD hub coil is engaged when ground is supplied on the BROWN/WHITE circuit for the AWD hub coil.
• Ground is provided through the ECU, the BROWN/WHITE circuit terminates at ECU pin 217.
• The ECU must see all required operating conditions (rpm in range, correct gear range) and an AWD switch signal to
activate. It then communicates with the Instrument Cluster via CAN bus to display the AWD icon.

DIAGNOSING SYSTEM FAILURES

• Verify the AWD/ADC switch is functional. This can be accomplished by seeing if the AWD indicator comes on when
the switch is turned on and all AWD criteria are met..
• Verify the AWD/ADC Coil circuit(s).
1. Check the DRIVE fuse.
2. Disconnect the AWD/ADC hub coil connector at the front gear case.
3. Connect the clamp lead of your test light to battery negative (B-).
The BROWN/WHITE (BN/WH) and BROWN/YELLOW (BN/YE) wires in the AWD/ADC hub coil connector are
grounds, but they are ECU controlled. They will not be consistent and reliable for either this test or trying to read
voltage with a DVOM. Only use B- at the battery or a known good chassis ground for testing this and the ADC circuit.
4. Turn the key on, engine off.
5. Probe the RED/GREEN (RD/GN)wire in terminal C or D (C is AWD, D is for ADC) on the main harness side.
If it illuminates, the circuit is verified up to the front gearcase.
If not, you have an open. Check continuity from the AWD/ADC connector RD/GN in terminal C or D (C for AWD,
D for ADC) back to the DRIVE fuse.
If all checked good, test continuity from the BN/WH in terminal B of the front gearcase connector to terminal 17 in
the ECU connector (circuit E217) if the issue is with AWD. If the issue is with ADC, check the BN/YE back to ECU
terminal 49 (circuit E249).
• Test the AWD hub coil using an ohm meter.
11.54
NOTE
AWD Hub Coil Resistance:
24 Ω ± 5%