Page 77 - Manual_Polaris_RZR_ProXP-20-21

GENERAL INFORMATION

EPS TROUBLESHOOTING (USING DIGITAL WRENCH®)

Troubleshooting 1
Procedure Advises
Digital Wrench
↓
Connect Digital Wrench
to Diagnostic Connector
↓
Check wire harness for
Is Digital Wrench able to → damaged/shorted CAN
Turn key to “On”Position → establish a connection to → → bus wires. Repair or
EPS? No replace harness if
necessary
Yes↓ ↓

Trace/Repair CAN bus ←
Follow Digital Wrench wiring and ignition power Is DW able to establish a
instructions No connection to the ECM?
wires
↓ Yes↓
Replace Power Steering
Module if any of the Error
codes are present from
Table 1.
Replace EPS
Perform further testing if
Error Codes are present
from Table 2.

TABLE 1

• Position Encoder Error • Phase Sensing Excessive Current
• EPS Software Error • Torque Sensor Range
• Steering Torque Sensor Full Failure • Rotor Encoder Communication
• Steering Excessive Current Error* • Rotor Encoder Variance
• Steering Over Current Shutdown* • SEPIC Voltage Low/High
• Phase Sensing Over Current • EEPROM Failure

*These Error Codes must have multiple occurrences or you must be able to duplicate the condition before replacing
the EPS unit.

TABLE 2

• EPS Inverter Temperature Test • Battery Voltage Over / Under Test
1. Verify that the Power Steering module heat sink surface (top 1. Disconnect 2 pin power connector to EPS and verify battery
surface) is clean and free of mud and dirt. Make a note of how voltage (12-14 VDC) is present on pins with key on. If voltage is
much debris was on heat sink before cleaning. Record all power low, investigate and correct cause. If voltage at pins is correct,
steering error codes. EPS inverter temperature can be monitored cheak all connections for corrosion, damage, and tightness.
through Digital Wrench. Check pin 3 on 8 pin connector for 12V signal with key on.
2. Allow vehicle to set and cool for at least 2 hours.
3. Drive vehicle for 30 minutes of left and right turning and then
connect to Digital Wrench and read Power Steering Error Codes. • Calibration Error - Reflash EPS Unit
If inverter temperature error code is present, replace Power
Steering Module. If error is not present, Module is OK. EPS
inverter temperature can be checked using Digital Wrench.

9930583 R01 - 2020-2021 RZR PRO XP / XP 4 Service Manual 1.71
© Copyright Polaris Industries Inc.