Eps Troubleshooting (Using Digital Wrench®) - Polaris RZR PRO XP 2020 Service Manual

GENERAL INFORMATION
EPS TROUBLESHOOTING (USING DIGITAL WRENCH®)
Troubleshooting
Procedure Advises
Digital Wrench
↓
Connect Digital Wrench
to Diagnostic Connector
↓
Turn key to "On"Position
• Position Encoder Error
• EPS Software Error
• Steering Torque Sensor Full Failure
• Steering Excessive Current Error*
• Steering Over Current Shutdown*
• Phase Sensing Over Current
*These Error Codes must have multiple occurrences or you must be able to duplicate the condition before replacing
the EPS unit.
• EPS Inverter Temperature Test
1. Verify that the Power Steering module heat sink surface (top
surface) is clean and free of mud and dirt. Make a note of how
much debris was on heat sink before cleaning. Record all power
steering error codes. EPS inverter temperature can be monitored
through Digital Wrench.
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.
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.
1.66
Is Digital Wrench able to
→
establish a connection to
EPS?
↓
Yes
Follow Digital Wrench
instructions
↓
Replace Power Steering
Module if any of the Error
codes are present from
Table 1.
Perform further testing if
Error Codes are present
from Table 2.
→
→
No
Trace/Repair CAN bus
wiring and ignition power
wires
TABLE 1
• Phase Sensing Excessive Current
• Torque Sensor Range
• Rotor Encoder Communication
• Rotor Encoder Variance
• SEPIC Voltage Low/High
• EEPROM Failure
TABLE 2
• Battery Voltage Over / Under Test
1. Disconnect 2 pin power connector to EPS and verify battery
voltage (12-14 VDC) is present on pins with key on. If voltage is
low, investigate and correct cause. If voltage at pins is correct,
cheak all connections for corrosion, damage, and tightness.
Check pin 3 on 8 pin connector for 12V signal with key on.
• Calibration Error - Reflash EPS Unit
9930583 R02 - 2020 RZR PRO XP / XP 4 Service Manual
Check wire harness for
damaged/shorted CAN
→
bus wires. Repair or
replace harness if
necessary
↓
←
Is DW able to establish a
connection to the ECM?
No
↓
Yes
Replace EPS
© Copyright Polaris Industries Inc.