DTC

U3003:16

Power supply

U3003:17

DETECTION CONDITION

• Power supply voltage malfunction is detected

FAIL-SAFE FUNCTION

• Refer to “Fail-safe function table”. (See DTC TABLE [EPS CONTROL MODULE].)

POSSIBLE CAUSE

• DTC is stored in PCM

• Battery malfunction

• Generator malfunction

• Fuse (EPS 60A) malfunction

• Open or short to GND circuit in wiring harness between battery and EPS control module terminal 1A

• Open circuit in short-code

• Poor connection at each connector

Step

Inspection

Action

1

• Using the M-MDS, perform the PCM DTC inspection.

  (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.0)].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [PCM (SKYACTIV-G 2.0)].)

DTC troubleshooting completed, then go to the next step.

No

Go to the next step.

2

• Inspect the battery.

  (See BATTERY INSPECTION.)

• Is there any malfunction?

Yes

Charge or replace the battery, then go to Step7.

(See BATTERY RECHARGING.)

(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

No

Go to the next step.

3

• Inspect the generator.

  (See GENERATOR INSPECTION [SKYACTIV-G 2.0].)

• Is there any malfunction?

Yes

Replace the generator, then go to Step7.

(See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

No

Go to the next step.

4

• Is the fuse (EPS 60A) normal?

Yes

Go to the next step.

No

• If the fuse is blown:

• Refer to the wiring diagram and verify whether or not there is a common connector between fuse and EPS control module terminal 1A.

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to ground.

• Replace the fuse.

• If the fuse is damaged:

• Replace the fuse.

Go to Step7.

5

• Switch the ignition OFF.

• Disconnect the EPS control module connector.

• Switch the ignition ON (engine off).

• Measure the voltage between EPS control module terminal 1A (wiring harness-side) and body ground.

• Is the voltage 10 V or more?

Yes

Go to the next Step.

No

Refer to the wiring diagram and verify whether or not there is a common connector between battery and EPS control module terminal 1A.

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has an open circuit.

Go to Step7.

6

• Switch the ignition OFF.

• Disconnect the EPS control module short-code.

• Measure the resistance between short-code and body ground.

• Is the resistance 0—1 ohm?

Yes

Go to the next step.

No

Repair or replace the malfunctioning part, then go to the next step.

7

• Using the M-MDS, clear the DTC from the EPS control module.

  (See CLEARING DTC [EPS CONTROL MODULE].)

• Using the M-MDS, perform the EPS control module DTC inspection.

  (See DTC INSPECTION [EPS CONTROL MODULE].)

• Is the same DTC present?

Yes

Repeat the inspection from Step1.

If the malfunction recurs, replace the EPS control module, then go to the next step.

(See ELECTRIC POWER STEERING (EPS) CONTROL MODULE REMOVAL/INSTALLATION.)

No

Go to the next step.

8

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [EPS CONTROL MODULE].)

No

DTC troubleshooting completed.