Polaris RZR PRO XP 2020 Service Manual page 173

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2. With no power supplied, pressure will flow from the

compressor housing line to the boost control valve.

The boost control valve will send pressure to the

wastegate actuator. No pressure should be seen at

the vent line.

ACTUATOR / WASTEGATE

Reference Actuator / Wastegate Inspection page 3.25

outlined in this chapter.

BOOST PRESSURE SENSOR HARNESS

1. Connect to Digital Wrench. Start the engine and

monitor the Boost Pressure reading while wiggling

the wiring near the connector. The reading will dive/

spike if a bad connections is found. Or gently pull

wires at connector to see if they easily break.

Wire insulation may conceal broken sensor wiring.

Vibration from the running engine will cause boost

pressure signal to drift low and set fault codes.

TURBOCHARGER

Inspect the turbocharger for:

• Damaged compressor from dirt ingestion.

• Failed turbocharger bearings.

• Wastegate flapper broken or missing.

• An excessive amount of oil in intake/exhaust is a sign

of bad seals. This creates oil residue in the intake/

exhaust, plugging the intake/exhaust and damaging

Inspect the exhaust system for:

• Clogged spark arrestor.

• Damaged catalytic converter (use inspection mirror or

9850068 R01 - 2020-2021 RZR PRO XP / XP 4 Service Manual

ENGINE / COOLING SYSTEM

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