165
NOTE: Prior to troubleshooting below, make sure
that Ignition Key Switch has not been left on with the
engine not started. After five minutes, this will deacti-
vate the EPS and display the malfunction code. Turn
Ignition Key Switch OFF and back to ON to reset and
reactivate the EPS. If code and symptom persists,
continue as follows:
1. Check 30 amp EPS fuse.
2. Check EPS relay (may be switched with any other
4-pin relay on PDM - replace relay if EPS normal
after switching).
3. Disconnect 2-pin connector on the EPS assembly
and connect a volt meter set to DC voltage to the har-
ness (black meter lead to BLK and red meter lead to
ORG/BRN).With the ignition switch to the ON posi-
tion, the meter must read more than 8.5 DC volts (if
correct voltage is not present, check connections and
wiring harness).
Condition: Ignition switch ON and EPS assist normal
when moving handlebar. Code “P0635” flashing.
1. Check for speed sensor signal by disconnecting the
8-pin connector from the EPS assembly and using a
multi-meter set to the DC volt position, connect the
black lead to the PNK/YEL wire and the red lead to
the ORG wire. With the ignition switch turned to the
ON position, slowly move the vehicle forward or
backward. The meter must alternate from 0 DC volts
to approximately 12 DC volts. If meter readings are
not as specified:
A. Check EPS diode for correct installation or open
diode (replace diode or install correctly).
B. Check speed sensor using procedure found in this
section (replace speed sensor/install proper gauge).
2. Check for engine speed signal by disconnecting the
8-pin connector from the EPS assembly and using a
multi-meter set to the AC voltage position, connect
one lead to any BLK wire and the other lead to
YEL/VLT wire. Start the engine and with the engine
idling, the meter should read approximately 7.5 AC
volts. If meter reading is not as specified:
A. Check the wiring harness from EPS to gauge
(YEL/VLT wire - repair wiring).
B. Check the AC generator (see Stator Coil/Crank-
shaft Position (CKP) Sensor in this section). If not
to specifications, replace the stator coil.
If after completing the above checks with normal results and
malfunction code “P0635” persists, the EPS assembly must
be replaced. To replace the EPS assembly, see the Steer-
ing/Frame/Controls section.
Electronic Power
Steering (EPS) (XTX)
The EPS system is an electro-mechanical device that utilizes
12 volt DC power to drive a motor linked to the steering
shaft to assist the driver when rotating the steering wheel.
Driver steering inputs are detected by a torque-sensing
transducer assembly within the EPS housing. These inputs
are converted to electronic signals by the transducer and
control circuitry to tell the motor which way to drive the
steering shaft. When no steering input (pressure on the steer-
ing wheel) is detected, no torque signal is generated, and no
steering assist is provided by the motor.
The EPS system is battery-system powered; therefore, the
battery must be in good condition and fully charged.
Power delivery and overload protection are provided by an
EPS relay and 30-amp fuse, located under the seat in the
Power Distribution Module (PDM). If a system malfunc-
tion occurs, a diagnostic trouble code (DTC) will flash on
the LCD gauge until the condition is corrected, the ignition
key is cycled, or the EPS recovers.
The following is a list of conditions that can generate a
code.
CAUTION
Do not attempt to disassemble the EPS assembly as
there are no serviceable components within the assem-
bly and damage will occur voiding the EPS warranty.
Code
Fault Description
Fault Condition
Possible Cause
EPS Fault Recovery Method
C1301 Over Current
EPS internal over-current condition
has been detected
Internal EPS Condition
Correct EPS condition*
C1302 Excessive Current Error
EPS internal current measurement
error has been detected
Internal EPS Condition
Correct EPS condition*
C1303 Torque Sensor Range
Fault
EPS internal torque sensor range
condition has been detected
Internal EPS Condition
Correct EPS condition*
C1304 Torque Sensor Linearity
Fault
EPS internal torque sensor linearity
condition has been detected
Internal EPS Condition
Correct EPS condition*
C1305 Rotor Position Encoder
EPS internal rotor position encoder
condition has been detected
Internal EPS Condition
Correct EPS condition*
C1306 System Voltage Low
EPS battery power low-voltage condi-
tion has been detected
System voltage low (less than 11 VDC at
the EPS). Wire harness issue, faulty volt-
age regulator, weak battery or loose bat-
tery terminals.
EPS will auto-recover when the bat-
tery supply returns to normal
C1307 System Voltage High
EPS battery power over-voltage con-
dition has been detected
System voltage high (more than 16 VDC
at the EPS). Wire harness issue, faulty
voltage regulator or loose battery termi-
nals.
EPS will auto-recover when the bat-
tery supply returns to normal
C1308 Temperature Above 110°
C
EPS internal 110° C over-temp condi-
tion has been detected
Clean the EPS housing and cooling fins. EPS will auto-recover when internal
temperature drops below 105° C
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