DTC U3003:16/U3003:17/U3003:1C [DYNAMIC STABILITY CONTROL (DSC)]

id0402b2880500

DTC	U3003:16, U3003:17, U3003:1C		Power supply system
DETECTION CONDITION		•  U3003:16 ―  The vehicle speed exceeds 3 km/h {2 mph} and the voltage at DSC HU/CM terminal AH is less than 10 V. •  U3003:17 ―  The voltage at DSC HU/CM terminal AH is 16 V or more. •  U3003:1C ―  Low ignition voltage (10 V or less) is detected at the voltage monitor of the solenoid valve or motor monitor. ―  The ABS wheel speed sensor power supply for all four wheels decreases for a continuous 60 s with the voltage at DSC HU/CM terminal AH is 10 V or less.
FAIL-SAFE FUNCTION		•  Refer to “Fail-safe Function Malfunction Contents”. (See DTC TABLE [DYNAMIC STABILITY CONTROL (DSC)].)
POSSIBLE CAUSE		•  Poor connection at connectors (female terminal) •  Battery deterioration •  Generator malfunction •  Malfunction of fuse (MAIN 200A, ABS/DSC M 50A, ABS/DSC S 30A or SRS1 7.5 A) •  Open or short circuit in wiring harness between DSC HU/CM terminal AH and battery positive terminal •  Open or short circuit in wiring harness between DSC HU/CM terminal AK and battery positive terminal •  Open or short circuit in wiring harness between DSC HU/CM terminal AL and battery positive terminal •  Open circuit in wiring harness between DSC HU/CM terminal B and body ground •  DSC HU/CM malfunction

Diagnostic Procedure

STEP	INSPECTION		ACTION
1	INSPECT BATTERY VOLTAGE •  Is the battery positive terminal voltage normal?	Yes	Inspect for normal connection of the battery terminals. Go to the next step.
		No	Charge or replace the battery, then go to Step 7. (See BATTERY RECHARGING.) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION)].) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT CYLINDER DEACTIVATION)].) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.5T].) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
2	INSPECT BATTERY GRAVITY •  Is battery specific gravity as specified? (See BATTERY INSPECTION.)	Yes	Go to the next step.
		No	Replace the battery, then go to Step 7. (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION)].) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT CYLINDER DEACTIVATION)].) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.5T].) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
3	INSPECT CHARGING SYSTEM •  Are the generator and the drive belt tensions normal? (See GENERATOR INSPECTION [WITHOUT i-ELOOP (SKYACTIV-D 2.2)].) (See GENERATOR INSPECTION [SKYACTIV-G 2.5T].) (See GENERATOR INSPECTION [WITHOUT i-ELOOP (SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT CYLINDER DEACTIVATION))].) (See GENERATOR INSPECTION [WITH i-ELOOP (SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT CYLINDER DEACTIVATION))].) (See GENERATOR INSPECTION [WITH i-ELOOP (SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION))].) (See GENERATOR INSPECTION [WITH i-ELOOP (SKYACTIV-D 2.2)].) (See DRIVE BELT INSPECTION [SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION)].) (See DRIVE BELT INSPECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT CYLINDER DEACTIVATION)].) (See DRIVE BELT INSPECTION [SKYACTIV-G 2.5T].) (See DRIVE BELT INSPECTION [SKYACTIV-D 2.2].)	Yes	Go to the next step.
		No	Replace the generator and/or drive belt if necessary. (See GENERATOR REMOVAL/INSTALLATION [WITHOUT i-ELOOP (SKYACTIV-D 2.2)].) (See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.5T].) (See GENERATOR REMOVAL/INSTALLATION [WITHOUT i-ELOOP (SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT CYLINDER DEACTIVATION))].) (See GENERATOR REMOVAL/INSTALLATION [WITH i-ELOOP (SKYACTIV-D 2.2)].) (See GENERATOR REMOVAL/INSTALLATION [WITH i-ELOOP (SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT CYLINDER DEACTIVATION))].) (See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION)].) (See DRIVE BELT REMOVAL/INSTALLATION [SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION)].) (See DRIVE BELT REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT CYLINDER DEACTIVATION)].) (See DRIVE BELT REMOVAL/INSTALLATION [SKYACTIV-G 2.5T].) (See DRIVE BELT REMOVAL/INSTALLATION [SKYACTIV-D 2.2].) Go to Step 7.
4	INSPECT DSC FUSE CONDITION •  Is the DSC fuse (MAIN 200A, ABS/DSC M 50A, ABS/DSC S 30A and SRS1 7.5A) normal?	Yes	Go to the next step.
		No	Replace the fuse, then go to Step 7.
5	INSPECT DSC HU/CM POWER SUPPLY FOR OPEN CIRCUIT •  Disconnect the DSC HU/CM connector. •  Switch the ignition ON. •  Measure the voltage between following connector terminals of the DSC HU/CM (wiring harness-side) and body ground: ―  DSC HU/CM: AH—Body ground ―  DSC HU/CM: AK—Body ground ―  DSC HU/CM: AL—Body ground •  Is the voltage 10 V or more?	Yes	Go to the next step.
		No	Repair or replace the wiring harness, then go to Step 7.
6	INSPECT DSC HU/CM GROUND FOR POOR GROUND OR OPEN CIRCUIT •  Switch the ignition off. •  Measure the resistance between following connector terminal of DSC HU/CM (wiring harness-side) and body ground: ―  DSC HU/CM: B—Body ground •  Is the resistance within 0—1 ohm?	Yes	Go to the next step.
		No	If there is open circuit: •  Repair or replace the wiring harness, then go to the next step. If resistance is not within specification: •  Repair or replace the poor ground part, then go to the next step.
7	VERIFY DTC TROUBLESHOOTING COMPLETED •  Using the M-MDS, clear the DTC from the DSC HU/CM. (See CLEARING DTC [DYNAMIC STABILITY CONTROL (DSC)].) •  Start the engine and drive the vehicle at 20 km/h {12 mph} or more. •  Gradually slow down and stop vehicle. •  Using the M-MDS, perform the DSC HU/CM DTC inspection. (See DTC INSPECTION [DYNAMIC STABILITY CONTROL (DSC)].) •  Is the same Pending DTC present?	Yes	Repeat the inspection from Step 1. •  If the malfunction recurs, replace the DSC HU/CM. (See DSC HU/CM REMOVAL/INSTALLATION.) Go to the next step.
		No	Go to the next step.
8	VERIFY NO DTC IS PRESENT •  Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [DYNAMIC STABILITY CONTROL (DSC)].)
		No	DTC troubleshooting completed.