80
* After correcting condition, cycle key switch On-Off-On.
TROUBLESHOOTING
NOTE: The EPS assembly is not serviceable and
must not be disassembled or EPS warranty will be
voided.
1. Check 30-amp EPS fuse.
2. With the ignition off, disconnect 2-pin connector on
the EPS assembly and connect a meter set to DC
voltage to the harness (black meter lead to BLK and
red meter lead to BRN).With the ignition switch in
the ON position, the meter should read battery volt-
age (if correct voltage is not present, check connec-
tions and wiring harness).
3. With ignition switch off, disconnect the 8-pin con-
nector on the EPS assembly and connect a meter set
to DC voltage to the harness (red meter lead to the
ORG wire and black meter lead to battery ground.)
With the ignition switch in the on position, the meter
should read battery voltage (if correct voltage is not
present, check for loose fittings or connections in the
wiring harness).
NOTE: If, after completing the preceding tests and
possible solutions with normal results, an EPS issue
persists with active DTCs C1301-C1305, 1316, or
C1326-C1329 confirmed by the Dealer Diagnostic
System, the EPS assembly must be replaced (see
Steering/Body/Controls).
C1315 Engine RPM Faulty Engine RPM CAN signal received by
the EPS incorrect or missing
Broken main harness CAN wires or
defective ECM
EPS will auto-recover when engine
RPM signal returns to normal
C1316 EEPROM Error EPS internal memory error has been
detected
Internal EPS condition Correct EPS condition*
C1317 CAN Bus Error EPS has lost CAN communication
with the EFI ECM
Broken CAN wires in the main harness. EFI
ECM connector has been disconnected.
Correct EPS condition*
C1318 Internal CRC Error EPS internal CRC calculation
condition has been detected
EPS reflash has failed. Battery power was
lost, or the key switch was turned off, during
EPS reflash programming.
EPS must be reprogrammed
C1319 Boot Counter Exceeded EPS internal application code
condition has been detected
Intermittent power has prevented a
successful application code launch
Correct EPS power condition*
C1320 Incorrect Vehicle
Speed-to-RPM Ratio
Vehicle speed signal received by the
EPS exceeds 10 mph (16 km/h), but
the engine RPM signal less than 500
RPM
Intermittent or broken main harness RPM
wires, intermittent voltage regulator,
intermittent or broken ACG stator wires
Correct EPS condition*
C1321 Vehicle Speed Erratic Vehicle speed signal received by the
EPS changing at an unrealistic rate
Intermittent main harness, intermittent
speed sensor, dirty speed senor or trigger
wheel
Correct EPS vehicle speed signal
condition*
C1322 Engine RPM Lost Engine RPM signal received by the
EPS exceeds 500 RPM and then is
zero or missing
Handlebar switch in the “OFF” position,
broken main harness RPM wires, defect
voltage regulator, broken ACG stator wires
EPS will auto-recover when engine
RPM signal returns to normal
C1323 “EPS OFF” Gauge Display Battery power has been applied to the
EPS for more than 5 minutes, but no
engine RPM signal has been detected
EPS has been automatically disabled, after
5 minutes of inactivity, to conserve battery
power
EPS will auto-recover when engine
is started or the key switch is
cycled On-Off-On
C1324 Loss of CAN
communication with EPS
unit
Gauge has lost CAN communication
with the EPS
Broken CAN wires in the main harness or
disconnected EPS. This is not an EPS
generated DTC; gauge DTC display only.
Gauge DTC display will clear when
the EPS-to-gauge CAN
communication is restored.
C1325 Dual Loss EPS loss of both the vehicle speed
and the engine RPM signals has been
detected
Handlebar switch in the “OFF” position, the
engine stalled (key switch “ON”), broken
harness wires, loss of CAN data signal
EPS will auto-recover when either
the vehicle speed or engine RPM
signal is restored.
C1326 Rotor Position Encoder EPS internal rotor position encoder
variance condition has been detected
Internal EPS Condition Correct EPS condition*
C1327 Voltage Converter Error
(Low)
EPS internal voltage converter
low-voltage condition has been
detected
Internal EPS Condition Correct EPS condition*
C1328 Voltage Converter Error
(High)
EPS internal voltage converter
over-voltage condition has been
detected
Internal EPS Condition Correct EPS condition*
C1329 Internal Data Error EPS internal preloaded data condition
has been detected
Internal EPS Condition EPS must be reprogrammed
Code Fault Description Fault Condition Possible Cause Fault Recovery Method
CAUTION
Do not attempt to check resistance of the EPS motor
(2-pin input receptacle). There are internal capacitors
holding a charge that can cause internal damage to an
ohmmeter.
CAUTION
If the Dealer Diagnostic System has confirmed an
active DTC relating to the CAN communication wires,
use extreme caution when testing the wires. Do not
probe the ECM connector with meter leads; instead use
a small T-pin or other suitable testing component to
make light and proper contact.
CAUTION
Never disconnect the ECM connector with the battery
cables installed onto the battery.
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