DTC U3003:16

id060200812800

DTC U3003:16	Battery power supply
DETECTION CONDITION	•  Voltage of 8 V or less detected by EPS CM internal ignition voltage observation.
FAIL-SAFE FUNCTION	•  Control is maintained by gradually decreasing the motor control current ―  However, control is inhibited if the power supply voltage is the specified value of less. •  Power steering malfunction indicator light: Illuminated
POSSIBLE CAUSE	•  Battery and/or generator malfunction •  EPS 60A fuse malfunction •  Malfunction in the wiring harness between EPS CM terminal 1B and battery •  Open circuit in the wiring harness between EPS CM terminal 1A and body ground
SYSTEM WIRING DIAGRAM

Diagnostic Procedure

Step	Inspection		Action
1	INSPECT BATTERY VOLTAGE •  Is the battery terminal voltage normal? (See BATTERY INSPECTION [MZR 1.6].) (See BATTERY INSPECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See BATTERY INSPECTION [SKYACTIV-D 1.5].) (See BATTERY INSPECTION [SKYACTIV-D 2.2].)	Yes	Make sure that battery terminal connection is okay. Go to the next step.
		No	Charge or replace the battery, then go to Step 6. (See BATTERY RECHARGING [MZR 1.6].) (See BATTERY RECHARGING [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See BATTERY RECHARGING [SKYACTIV-D 1.5].) (See BATTERY RECHARGING [SKYACTIV-D 2.2].) (See BATTERY REMOVAL/INSTALLATION [MZR 1.6].) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-D 1.5].) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
2	INSPECT BATTERY GRAVITY •  Is the battery specific gravity as specified? (See BATTERY INSPECTION [MZR 1.6].) (See BATTERY INSPECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See BATTERY INSPECTION [SKYACTIV-D 1.5].) (See BATTERY INSPECTION [SKYACTIV-D 2.2].)	Yes	Go to the next step.
		No	Replace the battery, then go to Step 6. (See BATTERY REMOVAL/INSTALLATION [MZR 1.6].) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-D 1.5].) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
3	INSPECT CHARGING SYSTEM •  Are the generator and drive belt tension normal? (See DRIVE BELT INSPECTION [MZR 1.6].) (See DRIVE BELT INSPECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See DRIVE BELT INSPECTION [SKYACTIV-D 1.5].) (See DRIVE BELT INSPECTION [SKYACTIV-D 2.2].) (See GENERATOR INSPECTION [MZR 1.6].) (See GENERATOR INSPECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-ELOOP)].) (See GENERATOR INSPECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITH i-ELOOP)].) (See GENERATOR INSPECTION [SKYACTIV-D 1.5].) (See GENERATOR INSPECTION [SKYACTIV-D 2.2 (WITHOUT i-ELOOP)].) (See GENERATOR INSPECTION [SKYACTIV-D 2.2 (WITH i-ELOOP)].)	Yes	Go to the next step.
		No	Replace the generator and/or drive belt if necessary. Go to step 6. (See GENERATOR REMOVAL/INSTALLATION [MZR 1.6].) (See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-ELOOP)].) (See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITH i-ELOOP)].) (See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-D 1.5].) (See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2 (WITHOUT i-ELOOP)].) (See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2 (WITH i-ELOOP)].) (See DRIVE BELT REMOVAL/INSTALLATION [MZR 1.6].) (See DRIVE BELT REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See DRIVE BELT REMOVAL/INSTALLATION [SKYACTIV-D 1.5].) (See DRIVE BELT REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
4	INSPECT FUSE CONDITION •  Is the fuse (EPS 60A) normal?	Yes	Go to the next step.
		No	Replace the fuse, then go to Step 7.
5	INSPECT EPS CM POWER SUPPLY CIRCUIT FOR OPEN OR SHORT CIRCUIT •  Start the engine. •  Measure the voltage between following EPS CM terminal (wiring harness-side) and ground. ―  EPS CM: 1B—ground •  Is the voltage 8 V or more?	Yes	Go to the next Step.
		No	Repair or replace the wiring harness (including fuse) between the EPS CM and ground, then go to Step 6.
6	INSPECT EPS CM GROUND CIRCUIT FOR POOR GROUND OR OPEN CIRCUIT •  Switch the ignition OFF. •  Inspect for continuity between EPS control module terminal 1A and body ground. •  Is there continuity?	Yes	Go to the next step.
		No	Repair or replace the wiring harness between terminal 1A and body ground, then go to the next step.
7	VERIFY THAT THE SAME DTC IS NOT PRESENT •  Make sure to reconnect all disconnected connectors. •  Clear the DTC from the memory. (See ELECTRIC POWER STEERING (EPS) ON-BOARD DIAGNOSIS.) •  Is the same DTC present?	Yes	Replace the steering column, then go to the next step. (See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION.)
		No	Go to the next step.
8	VERIFY THAT NO OTHER DTCS ARE PRESENT •  Are any other DTCs output?	Yes	Go to the applicable DTC inspection. (See ELECTRIC POWER STEERING (EPS) ON-BOARD DIAGNOSIS.)
		No	DTC troubleshooting completed.