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 AG is less than 10 V.

• U3003:17

• The voltage at DSC HU/CM terminal AG 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 AG is 10 V or less.

FAIL-SAFE FUNCTION

• Illuminates the ABS warning light, brake system warning light, TCS/DSC indicator light, and master warning light*.

• Tire pressure monitoring system warning light illuminates after flashes.

• Inhibits all of controls.

*: Vehicles with Smart City Brake Support (SCBS).

POSSIBLE CAUSE

• Malfunction of fuse (ABS/DSC M 50A or ABS/DSC S 30A)

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

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

• Battery deterioration

• Generator malfunction

• Poor connection at connectors (female terminal)

STEP

INSPECTION

ACTION

1

• 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 [SKYACTIV-G 2.5].)

(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.5].)

2

• Is battery specific gravity as specified?

Yes

Go to the next step.

No

Replace the battery, then go to Step 7.

(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.5].)

3

• Are the generator and the drive belt tensions normal?

Yes

Go to the next step.

No

Replace the generator and/or drive belt if necessary.

(See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.5 (WITHOUT i-ELOOP)].)

(See GENERATOR REMOVAL/INSTALLATION [i-ELOOP].)

(See DRIVE BELT REMOVAL/INSTALLATION [SKYACTIV-G 2.5].)

Go to Step 7.

4

• Is the DSC fuse (MAIN 125A, ABS/DSC M 50A and ABS/DSC S 30A) normal?

Yes

Go to the next step.

No

Replace the fuse, then go to Step 7.

5

• Disconnect the DSC HU/CM connector.

• Switch the ignition ON.

• Measure the voltage between following connector terminals of the DSC HU/CM (vehicle harness-side) and body ground:

• DSC HU/CM: AG—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

• Switch the ignition off.

• Measure the resistance between the following connector terminal of DSC HU/CM (vehicle harness-side) and body ground:

• DSC HU/CM: A—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

• 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)

No

Go to the next step.

8

• Are any other DTCs output?

Yes

Go to the applicable DTC inspection.

(See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].)

No

DTC troubleshooting completed.