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TROUBLESHOOTING
NOTE: The EPS assembly is not serviceable and
must not be disassembled or the EPS warranty will be
voided.
1. Check 30-amp EPS fuse.
NOTE: There are three black terminals and three
orange/black terminals that are connected to their
respective colors.
2. With the ignition off, disconnect 10-pin connector on
the EPS assembly and connect a voltmeter set to DC
voltage to the harness (black meter lead to BLK and
red meter lead to ORG/BRN). With the ignition
switch in the ON position, the meter should read bat-
tery voltage (if correct voltage is not present, check
connections and wiring harness).
3. With ignition switch off, disconnect the 10-pin con-
nector on the EPS assembly and connect a voltmeter
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 volt-
age is not present, check for loose fittings or connec-
tions in the wiring harness).
NOTE: If the preceding tests and possible solutions
produce normal results, and an EPS issue persists
with active DTCs confirmed by the Dealer Diagnostic
Service, the EPS assembly must be replaced (see
Ignition Switch
The ignition switch, dash switches, front accessory con-
nectors, and front switched accessory connector can be
accessed from under the dash or by pulling out the LCD
gauge.
VOLTAGE
NOTE: Perform this test on the harness connector.
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 battery ground.
3. Meter must show battery voltage.
NOTE: If the meter shows no battery voltage, trou-
bleshoot the main 30-amp fuse, the battery, or the
main wiring harness.
4. Connect the red meter lead to the brown/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 voltage
will be approximately 10.5 DC volts.
Ignition Coils
The ignition coils are located on the driver-side of the
cylinder head above the thermostat housing.
VOLTAGE
Primary Coils
1. Set the meter selector to the DC Voltage position.
2. Connect the red tester lead to the orange wire and the
black tester lead to ground.
3. Turn the ignition switch to the ON position. The
meter must show battery voltage.
C1372 Battery Voltage Low
EPS power low-voltage condition
has been detected.
System voltage is low (less than 11 VDC at
the EPS). Wire harness issue, faulty
voltage regulator, weak battery or loose
battery terminals.
EPS will auto-recover when the
battery supply returns to normal.
C1373 Battery Voltage High EPS battery power over-voltage
condition has been detected.
System voltage is high (more than 16 VDC
at the EPS). Wire harness issue, faulty
voltage regulator or loose battery terminals.
EPS will auto-recover when the
battery supply returns to normal.
C1374 Over Current Error
An EPS internal over-current
condition has been detected.
Internal EPS condition.
Correct the EPS condition, then
cycle the key switch ON-OFF-ON.
C1375 System Voltage High EPS battery power over-voltage
condition has been detected.
System voltage is high (more than 16 VDC
at the EPS). Wire harness issue, faulty
voltage regulator or loose battery terminals.
Correct the High System Voltage
condition, key OFF for 10 seconds
minimum, then key ON.
C1376 Current Sensor
Range
EPS internal current sensor
condition has been detected.
Internal EPS condition; check for EPS
software updates before replacing the EPS
unit.
Correct the internal current sensor
condition, key OFF for 10 seconds
minimum, then key ON.
Code Fault Description
Fault Condition
Possible Cause
EPS Fault Recovery Method
CAUTION
Do not attempt to check resistance of the EPS motor.
There are internal capacitors holding a charge that can
cause internal damage to an ohmmeter.
CAUTION
If the Dealer Diagnostic Service 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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