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The following tests may help in determining the source of
a code:
Condition: Ignition Key Switch ON and NO EPS assist
when moving the steering wheel. Code flashing.
NOTE: Prior to troubleshooting below, make sure
the 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 code. Turn the Ignition
Key Switch OFF and back to ON to reset and reacti-
vate 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 harness
(black meter lead to BLK and red meter lead to ORG/
BRN).With the ignition switch to the ON position, the
meter must read more than 8.5 DC volts (if correct
voltage is not present, check connections and wiring
harness - if correct voltage is present, replace EPS
assembly - see Steering/Frame/Controls).
If after completing the above checks with normal results
and a code persists, the EPS assembly must be replaced
(see Steering/Frame/Controls).
Ignition Switch
To access the ignition switch, dash switches, front acces-
sory connectors, and front switched accessory connector,
the dash must be unfastened and slid to the rear.
VOLTAGE
1. Set the meter selector to the DC Voltage position.
2. Connect the red meter lead to the red wire; then con-
nect the black meter lead to ground.
3. Meter must show battery voltage.
NOTE: If the meter shows no battery voltage,
troubleshoot the main 30 amp fuse, the battery, or
the main wiring harness.
4. Connect the red meter lead to the red/black wire;
then with the black lead grounded, turn the ignition
switch to the ON position. The meter must show bat-
tery voltage.
5. Connect the red meter lead to the yellow/green wire;
then with the black lead grounded, turn the ignition
switch to the START position. The starter should
engage and the meter must show battery voltage.
NOTE: When the starter is engaged, battery volt-
age will be approximately 10.5 DC volts.
Headlight Switch
VOLTAGE
1. Connect the red meter lead to the gray wire; then
connect the black meter lead to the black wire.
2. Turn the ignition switch to the ON position. The
meter must show battery voltage.
NOTE: If the meter does not show battery volt-
age, troubleshoot the LIGHTS fuse on the power
distribution module, the ignition switch, or the
main harness.
3. Connect the red meter lead to the yellow wire; then
select the high beam position on the headlight
switch. The meter must show battery voltage.
4. Connect the red meter lead to either of the two white
wires; then select the low beam position on the head-
light switch. The meter must show battery voltage.
NOTE: The battery voltage will show lower in steps
3 and 4 due to electrical loading of the headlights.
Drive Select Switch
RESISTANCE
1. Remove the switch assembly from the dash; then dis-
connect the harness from the switch.
NOTE: The switch can be removed from the dash
using a thin, flat pry bar or suitable putty knife. It is not
necessary to remove the dash to remove the switch.
C1315 Engine RPM Broken CAN wires in the
main harness.
EPS will auto-recover
when engine RPM
signal returns to nor-
mal
C1316 EEPROM
Error
Internal EPS condition
Correct EPS condi-
tion, then cycle key
switch On-Off-On
C1317 CAN Bus
Error
Broken CAN wires in main
harness. EFI ECM connec-
tor has been disconnected.
Correct EPS condi-
tion, then cycle key
switch On-Off-On
C1318 CRC Error
EPS reflash failed. Battery
power was lost or key switch
was turned off during EPS
reflash.
EPS must be repro-
grammed
C1319 Boot Counter
Exceeded
EPS reflash failed. Battery
power was lost or key switch
was turned off during EPS
reflash.
EPS must be repro-
grammed
C1323 “EPS OFF”
Gauge Dis-
play
EPS has been automatically
disabled after five minutes
of inactivity to conserve bat-
tery power.
EPS will auto-recover
when engine is
started or key switch
is cycled On-Off-On
C1324 Loss of CAN
communica-
tion with EPS
unit
Broken CAN wires in main
harness or disconnected
EPS. This is not an EPS
generated DTC; gauge DTC
display only.
Gauge DTC display
will clear when EPS-
to-gauge CAN com-
munication restored.
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.
Code
Fault
Description
Possible Cause
Recovery Method
