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DTC Advanced Diagnostics: EPS related DTCs
EPS Related DTCs
NOTE
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Initial Diagnosis:
The initial on-board diagnosis occurs right after the vehicle condition is turned to the ON mode, and the EPS indicator comes on, and continues until the indicator goes off. |
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Regular Diagnosis:
The regular on-board diagnosis begins right after the EPS indicator goes off, and it continues until the vehicle condition is turned to the OFF (LOCK) mode. |
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Review "How to troubleshoot the EPS" before doing the DTC troubleshooting procedure. |
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Test-drive the vehicle according to local traffic conditions and regulations. Do not test-drive on a lift unless specified. |
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The possible causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes. |
DTC C0037-F0: Left Rear Wheel Speed Sensor Malfunction
|
Confirmation Procedure |
Basic Condition:
|
|
12 volt battery voltage 10 - 16 V |
|
|
IG voltage continued more than 10 V for at least 1 second |
Operating Condition:
|
1. |
Turn the vehicle to the ON mode. |
|
2. |
Turn the vehicle to the OFF (LOCK) mode. |
|
3. |
Turn the vehicle to the ON mode and wait more than 29 seconds. | |
|
Execution |
Regular Diagnosis |
|
Duration |
Within 60 seconds |
|
DTC Type |
|
|
1 drive cycle |
|
|
EPS indicator on | |
|
Fail Safe Action |
|
|
Continue EPS function/assist | |
|
Possible Cause |
|
|
VSA modulator-control internal failure | | |
|
DTC C003A-F0: Right Rear Wheel Speed Sensor Malfunction
|
Confirmation Procedure |
Basic Condition:
|
|
12 volt battery voltage 10 - 16 V |
|
|
IG voltage continued more than 10 V for at least 1 second |
Operating Condition:
|
1. |
Turn the vehicle to the ON mode. |
|
2. |
Turn the vehicle to the OFF (LOCK) mode. |
|
3. |
Turn the vehicle to the ON mode and wait more than 29 seconds. | |
|
Execution |
Regular Diagnosis |
|
Duration |
Within 60 seconds |
|
DTC Type |
|
|
1 drive cycle |
|
|
EPS indicator on | |
|
Fail Safe Action |
|
|
Continue EPS function/assist | |
|
Possible Cause |
|
|
VSA modulator-control internal failure | | |
|
DTC C0062-96: Longitudinal Acceleration Sensor Malfunction
|
Confirmation Procedure |
Basic Condition:
|
|
12 volt battery voltage 10 - 16 V |
|
|
IG voltage continued more than 10 V for at least 1 second |
Operating Condition:
|
1. |
Turn the vehicle to the ON mode. |
|
2. |
Turn the vehicle to the OFF (LOCK) mode. |
|
3. |
Turn the vehicle to the ON mode and wait more than 29 seconds. | |
|
Execution |
Regular Diagnosis |
|
Duration |
Within 60 seconds |
|
DTC Type |
|
|
1 drive cycle |
|
|
EPS indicator on | |
|
Fail Safe Action |
|
|
Continue EPS function/assist | |
|
Possible Cause |
|
|
SRS unit internal failure | | |
|
DTC C0063-96: Yaw-Rate Sensor Malfunction
|
Confirmation Procedure |
Basic Condition:
|
|
12 volt battery voltage 10 - 16 V |
|
|
IG voltage continued more than 10 V for at least 1 second |
Operating Condition:
|
1. |
Turn the vehicle to the ON mode. |
|
2. |
Turn the vehicle to the OFF (LOCK) mode. |
|
3. |
Turn the vehicle to the ON mode and wait more than 29 seconds. | |
|
Execution |
Regular Diagnosis |
|
Duration |
Within 60 seconds |
|
DTC Type |
|
|
1 drive cycle |
|
|
EPS indicator on | |
|
Fail Safe Action |
|
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Continue EPS function/assist (Limited assist) | |
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Possible Cause |
|
|
SRS unit internal failure | | |
|
DTC C1400-11: Motor Current Malfunction
|
Confirmation Procedure |
Basic Condition:
|
|
12 volt battery voltage 10 - 16 V |
|
|
IG voltage continued more than 10 V |
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While an engine is running |
Operating Condition:
|
1. |
Start the engine. |
|
2. |
Turn the steering wheel to left and right several times. | |
|
Execution |
Regular Diagnosis |
|
Duration |
Within 60 seconds |
|
DTC Type |
|
|
1 drive cycle |
|
|
EPS indicator on | |
|
Fail Safe Action |
|
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Stop EPS function/assist
(Continue system diagnosis: EPS function/assist will return to normal when the current returns to normal after the next IG-ON) | |
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Possible Cause |
|
|
EPS motor/control unit internal failure | | |
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DTC C1400-13: EPS Motor Circuit Open
|
Confirmation Procedure |
Basic Condition:
|
|
12 volt battery voltage 10 - 16 V |
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IG voltage continued more than 10 V |
|
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While an engine is running |
Operating Condition:
|
1. |
Start the engine. |
|
2. |
Turn the steering wheel to left and right several times. | |
|
Execution |
Regular Diagnosis |
|
Duration |
Within 10 seconds |
|
DTC Type |
|
|
1 drive cycle |
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|
EPS indicator on | |
|
Fail Safe Action |
|
|
Stop EPS function/assist
(Continue system diagnosis: EPS function/assist will return to normal when the current returns to normal after the next IG-ON) | |
|
Possible Cause |
|
|
EPS motor/control unit internal failure | | |
|
DTC C1400-14: Motor Voltage Malfunction
|
Confirmation Procedure |
Basic Condition:
|
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12 volt battery voltage 10 - 16 V |
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|
IG voltage continued more than 10 V |
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While an engine is running |
Operating Condition:
|
1. |
Start the engine. |
|
2. |
Turn the steering wheel to left and right several times. | |
|
Execution |
Initial Diagnosis/Regular Diagnosis |
|
Duration |
Within 10 seconds |
|
DTC Type |
|
|
1 drive cycle |
|
|
EPS indicator on | |
|
Fail Safe Action |
|
|
Stop EPS function/assist
(Continue system diagnosis: EPS function/assist will return to normal when the voltage returns to normal after the next IG-ON) | |
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Possible Cause |
|
|
EPS motor/control unit internal failure | | |
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DTC C1403-14: Motor Angle Sensor (SIN/COS) Signals Open or Short
|
Confirmation Procedure |
Basic Condition:
|
|
12 volt battery voltage 10 - 16 V |
|
|
IG voltage continued more than 10 V for at least 1 second |
Operating Condition:
|
1. |
Turn the vehicle to the ON mode. |
|
2. |
Turn the vehicle to the OFF (LOCK) mode. |
|
3. |
Turn the vehicle to the ON mode. | |
|
Execution |
Regular Diagnosis |
|
Duration |
Within 10 seconds |
|
DTC Type |
|
|
1 drive cycle |
|
|
EPS indicator on | |
|
Fail Safe Action |
|
|
Stop EPS function/assist
(Continue system diagnosis: EPS function/assist will return to normal when the voltage returns to normal after the next IG-ON) | |
|
Possible Cause |
|
|
EPS motor/control unit internal failure | | |
|
DTC C1403-29: Motor Angle Sensor (SIN/COS) Signals Incorrect Correlation
|
Confirmation Procedure |
Basic Condition:
|
|
12 volt battery voltage 10 - 16 V |
|
|
IG voltage continued more than 10 V for at least 1 second |
Operating Condition:
|
1. |
Turn the vehicle to the ON mode. |
|
2. |
Turn the vehicle to the OFF (LOCK) mode. |
|
3. |
Turn the vehicle to the ON mode. | |
|
Execution |
Regular Diagnosis |
|
Duration |
Within 10 seconds |
|
DTC Type |
|
|
1 drive cycle |
|
|
EPS indicator on | |
|
Fail Safe Action |
|
|
Stop EPS function/assist
(Continue system diagnosis: EPS function/assist will return to normal when the voltage returns to normal after the next IG-ON) | |
|
Possible Cause |
|
|
EPS motor/control unit internal failure | | |
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DTC C1420-29: Main Torque Sensor and Sub Torque Sensor Incorrect Correlation
|
Confirmation Procedure |
Basic Condition:
|
|
Torque sensor power supply voltage 4.5 - 5.5 V |
Operating Condition:
|
1. |
Turn the vehicle to the ON mode. |
|
2. |
Turn the vehicle to the OFF (LOCK) mode. |
|
3. |
Turn the vehicle to the ON mode. | |
|
Execution |
Regular Diagnosis |
|
Duration |
Within 10 seconds |
|
DTC Type |
|
|
1 drive cycle |
|
|
EPS indicator on | |
|
Fail Safe Action |
|
|
Stop or continue EPS function/assist (Limited assist)
(Continue system diagnosis: EPS function/assist will return to normal when the torque sensor output voltage returns to normal after the next IG-ON) | |
|
Possible Cause |
|
|
Steering gearbox internal failure |
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EPS motor/control unit internal failure | | |
|
DTC C1421-14: Main Torque Sensor Malfunction
|
Confirmation Procedure |
Basic Condition:
|
|
Torque sensor power supply voltage 4.5 - 5.5 V |
Operating Condition:
|
1. |
Turn the vehicle to the ON mode. |
|
2. |
Turn the vehicle to the OFF (LOCK) mode. |
|
3. |
Turn the vehicle to the ON mode. | |
|
Execution |
Regular Diagnosis |
|
Duration |
Within 10 seconds |
|
DTC Type |
|
|
1 drive cycle |
|
|
EPS indicator on | |
|
Fail Safe Action |
|
|
Stop or continue EPS function/assist (Limited assist)
(Continue system diagnosis: EPS function/assist will return to normal when the torque sensor output voltage returns to normal after the next IG-ON) | |
|
Possible Cause |
|
|
Open, Short to ground, Short to power, or Poor connection between the EPS motor/control unit and the torque sensor (TSM line) |
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Open, Short to ground, or Poor connection between the EPS motor/control unit and the torque sensor (T/S VDD line) |
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Open or Poor connection between the EPS motor/control unit and the torque sensor (T/S GND line) |
|
|
Steering gearbox internal failure |
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|
EPS motor/control unit internal failure | | |
|
DTC C1422-14: Sub Torque Sensor Malfunction
|
Confirmation Procedure |
Basic Condition:
|
|
Torque sensor power supply voltage 4.5 - 5.5 V |
Operating Condition:
|
1. |
Turn the vehicle to the ON mode. |
|
2. |
Turn the vehicle to the OFF (LOCK) mode. |
|
3. |
Turn the vehicle to the ON mode. | |
|
Execution |
Regular Diagnosis |
|
Duration |
Within 10 seconds |
|
DTC Type |
|
|
1 drive cycle |
|
|
EPS indicator on | |
|
Fail Safe Action |
|
|
Stop or continue EPS function/assist (Limited assist)
(Continue system diagnosis: EPS function/assist will return to normal when the torque sensor output voltage returns to normal after the next IG-ON) | |
|
Possible Cause |
|
|
Open, Short to ground, or Poor connection between the EPS motor/control unit and the torque sensor (TSS line) |
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Short to other line between the EPS motor/control unit and the torque sensor (TSS and T/S VDD line) |
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Open or Poor connection between the EPS motor/control unit and the torque sensor (T/S GND line) |
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Open, Short to ground, or Poor connection between the EPS motor/control unit and the torque sensor (T/S VDD line) |
|
|
Steering gearbox internal failure |
|
|
EPS motor/control unit internal failure | | |
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DTC C1423-14: Torque Sensor Power Source Circuit Malfunction
|
Confirmation Procedure |
Basic Condition:
|
|
12 volt battery voltage 10 - 16 V |
|
|
IG voltage continued more than 10 V for at least 1 second |
Operating Condition:
|
1. |
Turn the vehicle to the ON mode. |
|
2. |
Turn the vehicle to the OFF (LOCK) mode. |
|
3. |
Turn the vehicle to the ON mode. | |
|
Execution |
Regular Diagnosis |
|
Duration |
Within 10 seconds |
|
DTC Type |
|
|
1 drive cycle |
|
|
EPS indicator on | |
|
Fail Safe Action |
|
|
Stop or continue EPS function/assist (Limited assist)
(Continue system diagnosis: EPS function/assist will return to normal when the torque sensor output voltage returns to normal after the next IG-ON) | |
|
Possible Cause |
|
|
Short to ground between the EPS motor/control unit and the torque sensor (T/S VDD line) |
|
|
Steering gearbox internal failure |
|
|
EPS motor/control unit internal failure | | |
|
DTC C1432-62: Vehicle Speed and the Engine Speed Incorrect Correlation
|
Confirmation Procedure |
Basic Condition:
|
|
12 volt battery voltage 10 - 16 V |
|
|
IG voltage continued more than 10 V for at least 1 second |
Operating Condition:
|
1. |
Start the engine. |
|
2. |
Test-drive the vehicle at a steady speed of 13 mph (20 km/h) or more for at least 30 seconds.
(Be careful of the surrounding traffic conditions.) | |
|
Execution |
Regular Diagnosis |
|
Duration |
Within 60 seconds |
|
DTC Type |
|
|
1 drive cycle |
|
|
EPS indicator on | |
|
Fail Safe Action |
|
|
Stop or continue EPS function/assist (Limited assist)
(Continue system diagnosis: EPS function/assist will return to normal when the vehicle speed signal returns to normal) | |
|
Possible Cause |
|
|
PCM internal failure |
|
|
EPS motor/control unit internal failure | | |
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DTC U0029-00: F-CAN Malfunction (Bus-Off)
|
Confirmation Procedure |
Basic Condition:
|
|
12 volt battery voltage 10 - 16 V |
|
|
IG voltage continued more than 10 V for at least 1 second |
Operating Condition:
|
1. |
Turn the vehicle to the ON mode. |
|
2. |
Turn the vehicle to the OFF (LOCK) mode. |
|
3. |
Turn the vehicle to the ON mode and wait more than 10 seconds. | |
|
Execution |
Initial Diagnosis/Regular Diagnosis |
|
Duration |
Within 10 seconds |
|
DTC Type |
|
|
1 drive cycle |
|
|
EPS indicator off | |
|
Fail Safe Action |
|
|
Stop or continue EPS function/assist (Limited assist) | |
|
Possible Cause |
|
|
F-CAN lines failure |
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CAN gateway internal failure*1 |
|
|
EPS motor/control unit internal failure | | |
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DTC U0100-00: F-CAN Malfunction (EPS Control Unit-PCM/TCM)
|
Confirmation Procedure |
Basic Condition:
|
|
12 volt battery voltage 10 - 16 V |
|
|
IG voltage continued more than 10 V for at least 1 second |
Operating Condition:
|
1. |
Turn the vehicle to the ON mode. |
|
2. |
Turn the vehicle to the OFF (LOCK) mode. |
|
3. |
Turn the vehicle to the ON mode. | |
|
Execution |
Initial Diagnosis/Regular Diagnosis |
|
Duration |
Within 10 seconds |
|
DTC Type |
|
|
1 drive cycle |
|
|
EPS indicator on | |
|
Fail Safe Action |
|
|
Stop or continue EPS function/assist (Limited assist) | |
|
Possible Cause |
|
|
F-CAN lines failure |
|
|
CAN gateway internal failure*1 |
|
|
TCM internal failure |
|
|
PCM internal failure |
|
|
EPS motor/control unit internal failure | | |
|
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DTC U0122-00: F-CAN Malfunction (EPS Control Unit-VSA Modulator-Control Unit)
|
Confirmation Procedure |
Basic Condition:
|
|
12 volt battery voltage 10 - 16 V |
|
|
IG voltage continued more than 10 V for at least 1 second |
Operating Condition:
|
1. |
Turn the vehicle to the ON mode. |
|
2. |
Turn the vehicle to the OFF (LOCK) mode. |
|
3. |
Turn the vehicle to the ON mode. | |
|
Execution |
Initial Diagnosis/Regular Diagnosis |
|
Duration |
Within 10 seconds |
|
DTC Type |
|
|
1 drive cycle |
|
|
EPS indicator on | |
|
Fail Safe Action |
|
|
Continue EPS function/assist (Limited assist) | |
|
Possible Cause |
|
|
F-CAN lines failure |
|
|
CAN gateway internal failure*1 |
|
|
VSA modulator-control unit internal failure |
|
|
EPS motor/control unit internal failure | | |
|
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DTC U0151-00: F-CAN Malfunction (EPS Control Unit-SRS Unit)
|
Confirmation Procedure |
Basic Condition:
|
|
12 volt battery voltage 10 - 16 V |
|
|
IG voltage continued more than 10 V for at least 1 second |
Operating Condition:
|
1. |
Turn the vehicle to the ON mode. |
|
2. |
Turn the vehicle to the OFF (LOCK) mode. |
|
3. |
Turn the vehicle to the ON mode. | |
|
Execution |
Initial Diagnosis/Regular Diagnosis |
|
Duration |
Within 10 seconds |
|
DTC Type |
|
|
1 drive cycle |
|
|
EPS indicator on | |
|
Fail Safe Action |
|
|
Continue EPS function/assist (Limited assist) | |
|
Possible Cause |
|
|
F-CAN lines failure |
|
|
CAN gateway internal failure*1 |
|
|
SRS unit internal failure |
|
|
EPS motor/control unit internal failure | | |
|
|
DTC U0416-68: VSA System Malfunction
|
Confirmation Procedure |
Basic Condition:
|
|
12 volt battery voltage 10 - 16 V |
|
|
IG voltage continued more than 10 V for at least 1 second |
Operating Condition:
|
1. |
Start the engine. |
|
2. |
Wait more than 60 seconds. | |
|
Execution |
Regular Diagnosis |
|
Duration |
Within 60 seconds |
|
DTC Type |
|
|
1 drive cycle |
|
|
EPS indicator on | |
|
Fail Safe Action |
|
|
Continue EPS function/assist (Limited assist) | |
|
Possible Cause |
|
|
VSA modulator-control unit internal failure |
|
|
VSA related parts failure | | |
|
DTC U129C-00: F-CAN Malfunction (EPS Control Unit-Driving Support System Control Unit) (With LKAS)
|
Confirmation Procedure |
Basic Condition:
|
|
12 volt battery voltage 10 - 16 V |
|
|
IG voltage continued more than 10 V for at least 1 second |
Operating Condition:
|
1. |
Turn the vehicle to the ON mode. | |
|
Execution |
Regular Diagnosis |
|
Duration |
Within 10 seconds |
|
DTC Type |
|
|
1 drive cycle |
|
|
EPS indicator off | |
|
Fail Safe Action |
|
|
Does not start LKAS function/assist | |
|
Possible Cause |
|
|
F-CAN lines failure |
|
|
Multipurpose camera unit internal failure*1 |
|
|
Millimeter wave radar internal failure*2/*3 |
|
|
CAN gateway internal failure |
|
|
EPS motor/control unit internal failure | | |
|
|
DTC U1483-68: LKAS Malfunction (Indicator value check) (With LKAS)
|
Confirmation Procedure |
Basic Condition:
|
|
12 volt battery voltage 10 - 16 V |
|
|
IG voltage continued more than 10 V for at least 1 second |
Operating Condition:
|
1. |
Turn the vehicle to the ON mode. | |
|
Execution |
Regular Diagnosis |
|
Duration |
Within 10 seconds |
|
DTC Type |
|
|
1 drive cycle |
|
|
EPS indicator off | |
|
Fail Safe Action |
|
|
Does not start LKAS function/assist | |
|
Possible Cause |
|
|
Multipurpose camera unit internal failure*1 |
|
|
Millimeter wave radar internal failure*2/*3 | | |
|
|
DTC U1483-94: LKAS Malfunction (With LKAS)
|
Confirmation Procedure |
Basic Condition:
|
|
12 volt battery voltage 10 - 16 V |
|
|
IG voltage continued more than 10 V for at least 1 second |
Operating Condition:
|
1. |
Turn the vehicle to the ON mode. | |
|
Execution |
Regular Diagnosis |
|
Duration |
Within 10 seconds |
|
DTC Type |
|
|
1 drive cycle |
|
|
EPS indicator off | |
|
Fail Safe Action |
|
|
Does not start LKAS function/assist | |
|
Possible Cause |
|
|
Multipurpose camera unit internal failure*1 |
|
|
Millimeter wave radar internal failure*2/*3 | | |
|
|
DTC U3000-49: EPS Control Unit Internal Circuit Malfunction
|
Confirmation Procedure |
Basic Condition:
|
|
12 volt battery voltage 10 - 16 V |
|
|
IG voltage continued more than 10 V |
|
|
While an engine is running |
Operating Condition:
|
1. |
Turn the vehicle to the ON mode. |
|
2. |
Turn the vehicle to the OFF (LOCK) mode. |
|
3. |
Turn the vehicle to the ON mode. |
|
4. |
Turn the steering wheel to left and right several times. | |
|
Execution |
Initial Diagnosis/Regular Diagnosis |
|
Duration |
Within 10 seconds |
|
DTC Type |
|
|
1 drive cycle |
|
|
EPS indicator on | |
|
Fail Safe Action |
|
|
Possible Cause |
|
|
EPS motor/control unit internal failure | | |
|
DTC U3000-51: ECU Software Update Failure
|
Confirmation Procedure |
Basic Condition:
|
|
12 volt battery voltage 10 - 16 V |
|
|
IG voltage continued more than 10 V |
|
|
While an engine is running |
Operating Condition:
|
1. |
During the EPS control unit program update. | |
|
Execution |
Initial Diagnosis |
|
Duration |
- |
|
DTC Type |
|
|
1 drive cycle |
|
|
EPS indicator on | |
|
Fail Safe Action |
|
|
Possible Cause |
|
|
EPS control unit update not completed |
|
|
EPS motor/control unit internal failure | | |
|
DTC U3000-55: EPS Control Unit Internal Malfunction
|
Confirmation Procedure |
Basic Condition:
|
|
12 volt battery voltage 10 - 16 V |
Operating Condition:
|
1. |
Turn the vehicle to the ON mode. | |
|
Execution |
Initial Diagnosis/Regular Diagnosis |
|
Duration |
- |
|
DTC Type |
|
|
1 drive cycle |
|
|
EPS indicator blinks | |
|
Fail Safe Action |
|
|
Stop or continue EPS function/assist (Limited assist) | |
|
Possible Cause |
|
|
EPS motor/control unit internal failure (ECU type not selected) | | |
|
DTC U3003-16: Battery Voltage Low
|
Confirmation Procedure |
Basic Condition:
|
|
12 volt battery voltage 10 - 16 V |
|
|
IG voltage continued more than 10 V |
|
|
While an engine is running |
Operating Condition:
|
1. |
Start the engine. |
|
2. |
Turn the vehicle to the OFF (LOCK) mode. |
|
3. |
Start the engine. | |
|
Execution |
Regular Diagnosis |
|
Duration |
Within 60 seconds |
|
DTC Type |
|
|
1 drive cycle |
|
|
EPS indicator on | |
|
Fail Safe Action |
|
|
Stop or continue EPS function/assist (Fade out)
(Continue system diagnosis: EPS function/assist will return to normal when the 12 volt battery voltage is more than 9.0 V) | |
|
Possible Cause |
|
|
Open or Poor connection between the EPS control unit and the under-hood fuse/relay box (+B EPS line) |
|
|
|
|
|
Abnormal 12 volt battery |
|
|
EPS motor/control unit internal failure | | |
|
DTC U3003-17: Battery Voltage High
|
Confirmation Procedure |
Basic Condition:
|
|
12 volt battery voltage 10 - 16 V |
|
|
IG voltage continued more than 10 V |
|
|
While an engine is running |
Operating Condition:
|
1. |
Start the engine. |
|
2. |
Turn the vehicle to the OFF (LOCK) mode. |
|
3. |
Start the engine. | |
|
Execution |
Regular Diagnosis |
|
Duration |
Within 60 seconds |
|
DTC Type |
|
|
1 drive cycle |
|
|
EPS indicator on | |
|
Fail Safe Action |
|
|
Stop or continue EPS function/assist (Fade out)
(Continue system diagnosis: EPS function/assist will return to normal when the 12 volt battery voltage is less than 18.2 V) | |
|
Possible Cause |
|
|
EPS motor/control unit internal failure | | |
| | 
