Table of Contents
BRAKE PRESSURE SWITCH
q
The brake pressure switch
line outlet on the master cylinder.
TORQUE
Brake Pressure Switch:
15 ft-lbs (20 Nm)
NOTE
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 0.5 Ω resistance when the brake is applied with
slight pressure, first clean the switch contacts and re-
test. Replace switch if necessary.
9928491 R04 - 2017-2018 RZR XP Turbo / XP4 Turbo Service Manual
© Copyright Polaris Industries Inc.
is located on the rear brake
BOOST CONTROL SOLENOID / VALVE
q
The boost control valve
allows the ECU to control the
amount of boost pressure within the induction system.
Boost control is accomplished by pulsing the valve at
different frequencies (pulse width modulate) depending
on the amount of boost pressure within the induction
system. If the ECU determines that the targeted boost
pressure has been obtained, the ECU will trigger the
pulse valve so that a certain level of compressor
pressure is routed to the wastegate actuator. Doing so
activates the wastegate so that a proportion of exhaust
gas bypasses the turbine. The boost control valve vents
to atmosphere when building boost. If the vent hose
atmosphere is plugged, an underboost code will set.
If a trouble code is being set for the boost control valve
and the vent hose is not plugged, the valve can be
statically tested with a multimeter. Disconnect the
harness to the valve and ohm the two pins on the valve.
Boost Control Valve:
22–24 Ω
More information relating to the turbocharger system and
components may be found in the Engine and Fuel
System chapters.
ELECTRICAL
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11.27
Chapters
Table of Contents
Troubleshooting
