DTC U3003:08/U3003:16/U3003:17 [DYNAMIC STABILITY CONTROL (DSC)]

id0402b2902000

DTC

U3003:08, U3003:16, U3003:17

Power supply system

DETECTION CONDITION

•  U3003:08

―  While the vehicle is traveling at a speed of 10 km/h {6.2 mph} or more, a CAN signal error caused by low power supply voltage is detected.

•  U3003:16

―  Low ignition voltage (7.9—9.6 V) is detected at the voltage monitor of the solenoid valve or motor monitor. (Except engine cranking condition)

―  Low ignition voltage (6.0—7.9 V) is detected at the voltage monitor of the solenoid valve or motor monitor.

―  Low ignition voltage (below 6.0 V) is detected at the voltage monitor of the solenoid valve or motor monitor.

•  U3003:17

―  High ignition voltage (18 V or more) is detected at the voltage monitor of the solenoid valve or motor monitor.

FAIL-SAFE FUNCTION

Refer to “Fail-safe function table”. (See DTC TABLE [DYNAMIC STABILITY CONTROL (DSC)].)

POSSIBLE CAUSE

•  Battery deterioration

•  Generator malfunction

•  Fuse (SRS1 7.5 A, ABS/DSC S 30 A, ABS/DSC M 50 A) malfunction

•  Open or short circuit in wiring harness between DSC HU/CM terminal A and battery

•  Open or short circuit in wiring harness between DSC HU/CM terminal B and battery

•  Open or short circuit in wiring harness between DSC HU/CM terminal Q and battery

•  Open circuit in wiring harness between DSC HU/CM terminal AL and body ground

•  Poor connection at connectors (female terminal)

Diagnostic procedure

STEP	INSPECTION		ACTION
1	INSPECT BATTERY VOLTAGE • Is the battery positive terminal voltage normal? (See BATTERY INSPECTION.)	Yes	Inspect for normal connection of the battery terminals. Go to the next step.
1		No	Charge or replace the battery, then go to Step 7. (See BATTERY RECHARGING.) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.5].) (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.
2		No	Replace the battery, then go to Step 7. (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.5].) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
3	INSPECT CHARGING SYSTEM • Are the generator and the drive belt tensions normal? (See GENERATOR INSPECTION [SKYACTIV-G 2.5].) (See GENERATOR INSPECTION [SKYACTIV-D 2.2].) (See DRIVE BELT INSPECTION [SKYACTIV-G 2.5].) (See DRIVE BELT INSPECTION [SKYACTIV-D 2.2].)	Yes	Go to the next step.
3		No	Replace the generator and/or drive belt if necessary. (See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.5].) (See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2].) (See DRIVE BELT REMOVAL/INSTALLATION [SKYACTIV-G 2.5].) (See DRIVE BELT REMOVAL/INSTALLATION [SKYACTIV-D 2.2].) Go to Step 7.
4	INSPECT FUSE CONDITION • Inspect the following fuses. ― SRS1 7.5 A ― ABS/DSC S 30 A ― ABS/DSC M 50 A • Is the fuse normal?	Yes	Go to the next step.
4		No	Replace the fuse, then go to Step 7.
5	INSPECT DSC HU/CM POWER SUPPLY FOR OPEN CIRCUIT • Switch the ignition off. • Disconnect the DSC HU/CM connectors. • Switch the ignition ON (engine off). • Measure the voltage between following connector terminals of the DSC HU/CM (vehicle harness-side) and body ground: ― DSC HU/CM: A—Body ground ― DSC HU/CM: B—Body ground ― DSC HU/CM: Q—Body ground • Is the voltage 10 V or more?	Yes	Go to the next step.
5		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 the DSC HU/CM terminal AL (vehicle harness-side) and body ground. • Is the resistance within 0—1 ohm?	Yes	Go to the next step.
6		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 THAT THE SAME DTC IS NOT PRESENT • Reconnect all disconnected connectors. • Clear the DTCs from the memory. (See CLEARING DTC [DYNAMIC STABILITY CONTROL (DSC)].) • Start the engine and drive the vehicle at 20 km/h {12 mph} or more. • 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.
7		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 DTC TABLE [DYNAMIC STABILITY CONTROL (DSC)].)
8		No	DTC troubleshooting completed.

DTC	U3003:08, U3003:16, U3003:17		Power supply system
DETECTION CONDITION		• U3003:08 ― While the vehicle is traveling at a speed of 10 km/h {6.2 mph} or more, a CAN signal error caused by low power supply voltage is detected. • U3003:16 ― Low ignition voltage (7.9—9.6 V) is detected at the voltage monitor of the solenoid valve or motor monitor. (Except engine cranking condition) ― Low ignition voltage (6.0—7.9 V) is detected at the voltage monitor of the solenoid valve or motor monitor. ― Low ignition voltage (below 6.0 V) is detected at the voltage monitor of the solenoid valve or motor monitor. • U3003:17 ― High ignition voltage (18 V or more) is detected at the voltage monitor of the solenoid valve or motor monitor.
FAIL-SAFE FUNCTION		Refer to “Fail-safe function table”. (See DTC TABLE [DYNAMIC STABILITY CONTROL (DSC)].)
POSSIBLE CAUSE		• Battery deterioration • Generator malfunction • Fuse (SRS1 7.5 A, ABS/DSC S 30 A, ABS/DSC M 50 A) malfunction • Open or short circuit in wiring harness between DSC HU/CM terminal A and battery • Open or short circuit in wiring harness between DSC HU/CM terminal B and battery • Open or short circuit in wiring harness between DSC HU/CM terminal Q and battery • Open circuit in wiring harness between DSC HU/CM terminal AL and body ground • Poor connection at connectors (female terminal)