System malfunction location

• U300E:13: Climate control unit power supply circuit open (IG1)

Detection condition

• Malfunction in wiring harness between climate control unit and C/U IG1 15 A fuse

Fail-safe

Not applicable

Possible cause

• C/U IG1 15 A fuse malfunction

• Climate control unit connector malfunction

• Open circuit in wiring harness between battery positive terminal and climate control unit

• Climate control unit malfunction

STEP

INSPECTION

ACTION

1

• Switch the ignition off.

• Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].)

• Remove the C/U IG1 15 A fuse.

• Is the fuse normal?

Yes

Install the C/U IG1 15 A fuse, then go to the next step.

No

Replace the C/U IG1 15 A fuse, then go to Step 4.

2

• Disconnect the climate control unit connector.

• Inspect the connector and terminals (corrosion, damage, pin disconnection).

• Are the connector and terminals normal?

Yes

Go to the next step.

No

Repair/replace the connector or terminal.

After repair procedure, go to the next step.

3

• Inspect for continuity between climate control unit terminal 1D and C/U IG1 15 A fuse.

• Is there continuity?

Yes

Go to the next step.

No

Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal and C/U IG1 15 A fuse.

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 the next step.

4

• Reconnect the disconnected connectors.

• Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].)

• Clear DTCs using the M-MDS.

• Perform the climate control unit DTC inspection using the M-MDS. (See DTC DISPLAY [FULL-AUTO AIR CONDITIONER].)

• Are DTCs U300E:13 displayed?

Yes

Repeat the inspection from Step 1.

• If the malfunction does not recur, go to the next step.

• If the malfunction recurs, replace the climate control unit. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)

Go to the next step.

No

Go to the next step.

5

• Verify other DTCs displayed.

• Are any other DTCs output?

Yes

Perform the corresponding DTC inspection.

No

DTC troubleshooting completed.