12.6
9850043 R01 - 2017-2021 RANGER 500 / 570 Service Manual
© Copyright Polaris Inc.
DIFFERENTIAL SOLENOID
The differential solenoid
q
is located on the right side of
the transmission. The solenoid actuates an engagement
dog, which locks and unlocks the rear differential. Refer
to Chapter 8 for more information on the rear differential
mechanical operation.
REAR DIFFERENTIAL SOLENOID
OPERATION
The Rear Diff Solenoid Relay is located on the frame
under the rear cargo box.
When the switch is pushed to activate “TURF” mode,
key-on accessory battery voltage is sent from the AWD /
2WD / TURF Switch to the ECU.
Depending on engine speed and gear position criteria,
the ECU energizes the Rear Diff Solenoid Relay allowing
it to enable the differential solenoid.
If the rear differential fails to switch from operational
modes:
• Check the solenoid and relay connectors. Look for
loose wires or bad connections.
• Check for power from the relay connector, to ensure
the solenoid has power to be activated. Check for
power at the ECU and Rear Differential Solenoid
Relay.
• Check the switch wires for loose connections.
• Remove solenoid from rear differential and ensure the
solenoid plunger is actuating.
CAUTION
Do not power the solenoid with 12 Volts for more than 1
second, or damage may occur to solenoid.
BRAKE PRESSURE SWITCH
The brake pressure switch
q
is located on the rear brake
line outlet on the master cylinder.
TORQUE
Master Cylinder Brake Pressure Switch / Banjo Bolt:
180 in-lbs +/- 10 in-lbs
NOTICE
Always replace brake system seals if fastener is
loosened or removed.
1. Disconnect the wire harness from the brake switch.
2. Connect an ohmmeter across switch contacts.
Reading should be infinite (OL).
3. Apply foot brake and check for continuity between
switch contacts. If there is no continuity or greater
than .5 ohms resistance when the brake is applied
with slight pressure, first clean the switch contacts
and re-test. Replace switch if necessary.
ELECTRICAL
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