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 AF is less than 10 V.

•  U3003:17

―  The voltage at DSC HU/CM terminal AF 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 ignition voltage at 10 V or less.

POSSIBLE CAUSE

•  ABS MOTOR 60A or ABS SOL 30A fuse malfunction

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

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

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

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

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

•  Battery deterioration

•  Generator malfunction

•  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 6. (See BATTERY RECHARGING [L8, LF, L5].) (See BATTERY RECHARGING [MZR-CD (RF Turbo)].) (See BATTERY RECHARGING [MZR-CD 2.2].) (See BATTERY REMOVAL/INSTALLATION [L8, LF, L5].) (See BATTERY REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].) (See BATTERY REMOVAL/INSTALLATION [MZR-CD 2.2].)
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 6. (See BATTERY REMOVAL/INSTALLATION [L8, LF, L5].) (See BATTERY REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].) (See BATTERY REMOVAL/INSTALLATION [MZR-CD 2.2].)
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 [L8, LF, L5].) (See GENERATOR REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].) (See GENERATOR REMOVAL/INSTALLATION [MZR-CD 2.2].) (See DRIVE BELT REMOVAL/INSTALLATION [L8, LF, L5].) (See DRIVE BELT REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].) (See DRIVE BELT REMOVAL/INSTALLATION [MZR-CD 2.2].) Go to Step 6.
4	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: AF—Body ground ― DSC HU/CM: AG—Body ground ― DSC HU/CM: AH—Body ground • Is the voltage 10 V or more?	Yes	Go to the next step.
4		No	Repair or replace the wiring harness, then go to Step 6.
5	INSPECT DSC HU/CM GROUND FOR POOR GROUND OR OPEN CIRCUIT • Switch the ignition to off. • Measure the resistance between following connector terminal of DSC HU/CM (vehicle harness-side) and body ground: ― DSC HU/CM: A—Body ground ― DSC HU/CM: B—Body ground • Is the resistance within 0—1 ohm?	Yes	Go to the next step.
5		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.
6	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. If the malfunction recurs, replace the DSC HU/CM, then go to the next step. (See DSC HU/CM REMOVAL/INSTALLATION)
6		No	Go to the next step.
7	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)].)
7		No	DTC troubleshooting completed.

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 AF is less than 10 V. • U3003:17 ― The voltage at DSC HU/CM terminal AF 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 ignition voltage at 10 V or less.
POSSIBLE CAUSE		• ABS MOTOR 60A or ABS SOL 30A fuse malfunction • Open or short circuit in wiring harness between DSC HU/CM terminal AF and battery • Open or short circuit in wiring harness between DSC HU/CM terminal AG and battery • Open or short circuit in wiring harness between DSC HU/CM terminal AH and battery • Open circuit in wiring harness between DSC HU/CM terminal A and body ground • Open circuit in wiring harness between DSC HU/CM terminal B and body ground • Battery deterioration • Generator malfunction • Poor connection at connectors (female terminal)