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 10km/h {6.2 mph} or more, a CAN signal error caused by low power supply voltage is detected.

•  U3003:16

―  When driving the vehicle at 20 km/h {12 mph} or more, low ignition voltage (10 V or less) 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.

POSSIBLE CAUSE

•  Battery deterioration

•  Generator malfunction

•  ABS 40A/DSC 20A/SAS 15A/ABS IG 7.5A fuse malfunction

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

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

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

•  Open circuit in wiring harness between DSC HU/CM terminal B 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?	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. (except MZR 2.0 DISI i-stop) (See BATTERY RECHARGING [ZY, Z6].) (See BATTERY RECHARGING [LF, L5].) (See BATTERY RECHARGING [L3 Turbo].) (See BATTERY RECHARGING [MZ-CD 1.6 (Y6)].) (See BATTERY RECHARGING [MZR-CD 2.2].) (See BATTERY REMOVAL/INSTALLATION [ZY, Z6].) (See BATTERY REMOVAL/INSTALLATION [LF, L5].) (See BATTERY REMOVAL/INSTALLATION [L3 Turbo].) (See BATTERY REMOVAL/INSTALLATION [MZ-CD 1.6 (Y6)].) (See BATTERY REMOVAL/INSTALLATION [MZR-CD 2.2].) Charge or replace the main battery, then go to Step 7. (MZR 2.0 DISI i-stop) (See BATTERY RECHARGING [MZR 2.0 DISI i-stop].) (See BATTERY REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].)
2	INSPECT BATTERY GRAVITY • Is battery specific gravity as specified?	Yes	Go to the next step.
2		No	Replace the battery, then go to Step 7. (except MZR 2.0 DISI i-stop) (See BATTERY REMOVAL/INSTALLATION [ZY, Z6].) (See BATTERY REMOVAL/INSTALLATION [LF, L5].) (See BATTERY REMOVAL/INSTALLATION [L3 Turbo].) (See BATTERY REMOVAL/INSTALLATION [MZ-CD 1.6 (Y6)].) (See BATTERY REMOVAL/INSTALLATION [MZR-CD 2.2].) Replace the main battery, then go to Step 7. (MZR 2.0 DISI i-stop) (See BATTERY REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].)
3	INSPECT CHARGING SYSTEM • Are the generator and the drive belt tensions normal?	Yes	Go to the next step.
3		No	Replace the generator and/or drive belt if necessary. (See GENERATOR REMOVAL/INSTALLATION [ZY, Z6].) (See GENERATOR REMOVAL/INSTALLATION [LF, L5].) (See GENERATOR REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].) (See GENERATOR REMOVAL/INSTALLATION [L3 Turbo].) (See GENERATOR REMOVAL/INSTALLATION [MZ-CD 1.6 (Y6)].) (See GENERATOR REMOVAL/INSTALLATION [MZR-CD 2.2].) (See DRIVE BELT REMOVAL/INSTALLATION [ZY, Z6].) (See DRIVE BELT REMOVAL/INSTALLATION [LF, L5].) (See DRIVE BELT REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].) (See DRIVE BELT REMOVAL/INSTALLATION [L3 Turbo].) (See DRIVE BELT REMOVAL/INSTALLATION [MZ-CD 1.6 (Y6) (EURO4 emission level)].) (See DRIVE BELT REMOVAL/INSTALLATION [MZ-CD 1.6 (Y6) (EURO5 emission level)].) (See DRIVE BELT REMOVAL/INSTALLATION [MZR-CD 2.2].) Go to Step 7.
4	INSPECT ABS FUSE CONDITION • Is the ABS fuse (ABS 40A/DSC 20A/SAS 15A/ABS IG 7.5A) 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 • Disconnect the DSC HU/CM connectors. • Switch the ignition to ON. • Measure the voltage between following connector terminals of the DSC HU/CM (vehicle harness-side) and body ground: ― DSC HU/CM: Y—Body ground ― DSC HU/CM: AU—Body ground ― DSC HU/CM: AT—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 to off. • Measure the resistance between the DSC HU/CM terminal B (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 ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].) • Start the engine and drive the vehicle at 20 km/h {12 mph} or more. • Are the same DTCs 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 ON-BOARD DIAGNOSIS [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 10km/h {6.2 mph} or more, a CAN signal error caused by low power supply voltage is detected. • U3003:16 ― When driving the vehicle at 20 km/h {12 mph} or more, low ignition voltage (10 V or less) 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.
POSSIBLE CAUSE		• Battery deterioration • Generator malfunction • ABS 40A/DSC 20A/SAS 15A/ABS IG 7.5A fuse malfunction • Open or short circuit in wiring harness between DSC HU/CM terminal Y and battery • Open or short circuit in wiring harness between DSC HU/CM terminal AU and battery • Open or short circuit in wiring harness between DSC HU/CM terminal AT and battery • Open circuit in wiring harness between DSC HU/CM terminal B and body ground • Poor connection at connectors (female terminal)