DTC U3003:16/U3003:17

id060200810000

DTC	U3003:16/U3003:17		Battery power supply
DETECTION CONDITION		•  U3003:16 ―  Voltage of 9 V or less detected by EPS control module internal ignition voltage observation. •  U3003:17 ―  Voltage of 17 V or more detected by EPS control module internal ignition voltage observation.
POSSIBLE CAUSE		•  EPAS 80 A fuse malfunction •  Malfunction in the wiring harness between EPS control module terminal 2A and battery •  Battery deterioration •  Generator malfunction •  Poor connection at connectors

System wiring diagram

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Diagnostic Procedure

Step	Inspection		Action
1	INSPECT EPS CONTROL MODULE POWER SUPPLY FOR MALFUNCTION •  Measure the voltage between EPS control module terminal 1B and body ground. •  Is the voltage approx. 9—17 V?	Yes	Go to Step 4.
		No	If the voltage is less than 9 V, go to the next step. If the voltage is more than 17 V, go to Step 3.
2	INSPECT BATTERY •  Inspect the electrolyte gravity and voltage of the battery. (See BATTERY INSPECTION [MZR 1.8, MZR 2.0, MZR 2.5].) (See BATTERY INSPECTION [MZR 2.0 DISI].) (See BATTERY INSPECTION [MZR-CD 2.2].) •  Is the battery normal?	Yes	Repair or replace the wiring harness (including fuse) between terminal 1B and the battery, then go to Step 4.
		No	Recharge or replace the battery, then go to Step 4. (See BATTERY RECHARGING [MZR 1.8, MZR 2.0, MZR 2.5].) (See BATTERY RECHARGING [MZR 2.0 DISI].) (See BATTERY RECHARGING [MZR-CD 2.2].) (See BATTERY REMOVAL/INSTALLATION [MZR 1.8, MZR 2.0, MZR 2.5].) (See BATTERY REMOVAL/INSTALLATION [MZR 2.0 DISI].) (See BATTERY REMOVAL/INSTALLATION [MZR-CD 2.2].)
3	INSPECT GENERATOR •  Inspect the generator for malfunction. (See GENERATOR INSPECTION [MZR 1.8, MZR 2.0, MZR 2.5].) (See GENERATOR INSPECTION [MZR 2.0 DISI].) (See GENERATOR INSPECTION [MZR-CD 2.2].) •  Is the generator normal?	Yes	Go to the next step.
		No	Repair or replace the generator, then go to the next step. (See GENERATOR REMOVAL/INSTALLATION [MZR 1.8, MZR 2.0, MZR 2.5].) (See GENERATOR REMOVAL/INSTALLATION [MZR 2.0 DISI].) (See GENERATOR REMOVAL/INSTALLATION [MZR-CD 2.2].)
4	VERIFY THAT SAME DTC IS NOT PRESENT •  Clear the DTC from the memory. (See ELECTRIC POWER STEERING (EPS) ON-BOARD DIAGNOSIS.) •  Is the same DTC present? (See ELECTRIC POWER STEERING (EPS) ON-BOARD DIAGNOSIS.)	Yes	Repeat the inspection from Step 1. If the malfunction recurs, replace the EPS control module. (See EPS CONTROL MODULE REMOVAL/INSTALLATION.)
		No	Go to the next step.
5	VERIFY THAT NO OTHER DTCs ARE PRESENT •  Are any other DTCs output? (See ELECTRIC POWER STEERING (EPS) ON-BOARD DIAGNOSIS.)	Yes	Go to the applicable DTC inspection. (See ELECTRIC POWER STEERING (EPS) ON-BOARD DIAGNOSIS.)
		No	DTC troubleshooting completed.