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DTC U3003:16, U3003:17 OR U3003:1C [ELECTRIC POWER STEERING (EPS)]

DTC U3003:16, U3003:17 OR U3003:1C [ELECTRIC POWER STEERING (EPS)]

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Outline

System malfunction location
Battery power supply
Detection condition
•  U3003:16
―  Voltage of 8 V or less detected by EPS control module internal battery voltage observation.
•  U3003:17 or U3003:1C
―  Voltage of 17.5 V or more detected by EPS control module internal battery voltage observation.
Fail-safe
•  Refer to “Fail-safe Function Table”.(See DTC TABLE [ELECTRIC POWER STEERING (EPS) (E)].)
Possible cause
•  Generator malfunction
•  Poor connection at connectors
•  EPS control module malfunction


Diagnostic Procedure

Step

Inspection

Results

Action
1
INSPECT BATTERY VOLTAGE
•  Is the battery terminal voltage normal?
Yes
Make sure that battery terminal connection is okay.
Go to the next step.
No
Charge or replace the battery, then perform the repair completion verification.
(See BATTERY RECHARGING [(E)].)
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (E))].)
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (E))].)
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)
2
INSPECT BATTERY GRAVITY
•  Is the battery specific gravity as specified?
Yes
Go to the next step.
No
Replace the battery, then perform the repair completion verification.
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (E))].)
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (E))].)
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)
3
INSPECT CHARGING SYSTEM
•  Are the generator and drive belt tension normal?
Yes
Go to the next step.
No
Replace the generator and/or drive belt if necessary.
Perform the repair completion verification.
(See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (E))].)
(See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION)].)
(See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)
(See DRIVE BELT REMOVAL/INSTALLATION [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (E))].)
(See DRIVE BELT REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (E))].)
(See DRIVE BELT REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)
(See DRIVE BELT REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)
4
INSPECT EPS CONTROL MODULE POWER SUPPLY CIRCUIT FOR OPEN OR SHORT CIRCUIT
•  Inspect the power supply circuit for an open circuit and short to ground.
•  Is the circuit normal?
Yes
Go to the next step.
No
Repair or replace the malfunctioning location and perform the repair completion verification.
5
INSPECT EPS CONTROL MODULE GROUND CIRCUIT FOR POOR GROUND OR OPEN CIRCUIT
•  Inspect the applicable circuit for an open circuit.
•  Is the circuit normal?
Yes
Go to the next step.
No
Repair or replace the malfunctioning location and perform the repair completion verification.
Repair completion verification 1
VERIFY DTC TROUBLESHOOTING COMPLETED
•  Using the M-MDS, clear the DTC from the EPS control module.
•  Using the M-MDS, perform the EPS control module DTC inspection.
•  Is the same Pending DTC present?
Yes
Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.
(See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].)
If the CAN communication is normal, perform the diagnosis from Step 1.
•  If the malfunction recurs, replace the EPS control module.
Go to the next step.
No
Go to the next step.
Repair completion verification 2
VERIFY NO DTC IS PRESENT
•  Are any DTCs present?
Yes
Go to applicable DTC inspection.
(See DTC TABLE [ELECTRIC POWER STEERING (EPS) (E)].)
No
DTC troubleshooting completed.