Description

Electrical supply unit (ESU) power supply voltage high input

Detection condition

• Electrical supply unit (ESU) power supply circuit (terminal 1H, 2P, or 2R) of 16 V or more is detected for 5 s or more.

Fail-safe

Not applicable

Possible cause

• DTCs are stored in the PCM.

• Battery malfunction

• Generator malfunction

• Electrical supply unit (ESU) malfunction

System wiring diagram

Not applicable

Step

Inspection

Action

1

• Retrieve the PCM DTCs using the M-MDS.

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

• Are any DTCs displayed?

Yes

Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.

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

No

Go to the next step.

2

• Inspect the battery.

  (See BATTERY INSPECTION.)

• Is the battery normal?

Yes

Go to the next step.

No

Replace the battery, then go to Step 4.

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

3

• Inspect the generator.

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

• Is the generator normal?

Yes

Go to the next step.

No

Replace the generator, then go to the next step.

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

4

• Clear the DTC for the electrical supply unit (ESU) using the M-MDS.

  (See CLEARING DTC [ELECTRICAL SUPPLY UNIT (ESU)].)

• Switch the ignition ON (engine off or on) and wait for 5 s or more.

• Retrieve the electrical supply unit (ESU) DTCs using the M-MDS.

  (See DTC INSPECTION [ELECTRICAL SUPPLY UNIT (ESU)].)

• Is the same DTC displayed?

Yes

Repeat the inspection from Step 1.

• If the malfunction recurs, replace the electrical supply unit (ESU).

  (See ELECTRICAL SUPPLY UNIT (ESU) REMOVAL/INSTALLATION.)

Go to the next step.

No

Go to the next step.

5

• Are any other DTCs displayed?

Yes

Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.

(See DTC TABLE [ELECTRICAL SUPPLY UNIT (ESU)].)

No

DTC troubleshooting completed.