System malfunction location

• Climate control unit circuit voltage (+5V) circuit short to ground

Detection condition

• Malfunction in wiring harness between climate control unit circuit voltage (+5V) and each sensor/actuator

Fail-safe function

Not applicable

Possible cause

• Connector or terminal malfunction

• Each sensor/actuator malfunction

• Short to ground in wiring harness between climate control unit and air mix actuator

• Short to ground in wiring harness between climate control unit and airflow mode actuator

• Short to ground in wiring harness between climate control unit and solar radiation sensor

• Climate control unit malfunction

STEP

INSPECTION

ACTION

1

• Switch the ignition off.

• Disconnect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Disconnect the climate control unit connectors.

  (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)

• 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 malfunctioning vehicle wiring harness, connector, or terminal.

After repair procedure, go to the next step.

2

• Disconnect the following each sensor/actuator connectors.

• Air mix actuator

  (See AIR MIX ACTUATOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)

• Airflow mode actuator

  (See AIRFLOW MODE ACTUATOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)

• Solar radiation sensor

  (See SOLAR RADIATION SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)

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

• Are the connector and terminals normal?

Yes

Go to the next step.

No

Replace the malfunctioning part.

(See AIR MIX ACTUATOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)

(See AIRFLOW MODE ACTUATOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)

(See SOLAR RADIATION SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)

After replace procedure, go to the next step.

3

• Inspect the following each sensor/actuator.

• Air mix actuator

  (See AIR MIX ACTUATOR INSPECTION [FULL-AUTO AIR CONDITIONER].)

• Airflow mode actuator

  (See AIRFLOW MODE ACTUATOR INSPECTION [FULL-AUTO AIR CONDITIONER].)

• Solar radiation sensor

  (See SOLAR RADIATION SENSOR INSPECTION [FULL-AUTO AIR CONDITIONER].)

• Is it normal?

Yes

Go to the next step.

No

Replace the malfunctioning sensor/actuator.

(See AIR MIX ACTUATOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)

(See AIRFLOW MODE ACTUATOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)

(See SOLAR RADIATION SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)

After replace procedure, go to the next step.

4

• Inspect for continuity between the following terminal (wiring harness-side) and body ground:

• Climate control unit terminal H

• Is there continuity?

Yes

Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal H and each sensor/actuator terminals.

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.

Go to the next step.

No

Go to the next step.

5

• Reconnect the disconnected connectors.

• Connect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Clear the past malfunction from memory.

  (See CLEARING DTC [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)].)

• Verify DTCs.

  (See DTC DISPLAY [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)].)

• Is DTC U200D:11 output?

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.

6

• Verify other DTCs displayed.

  (See DTC DISPLAY [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)].)

• Are any other DTCs output?

Yes

Perform the corresponding DTC inspection.

(See DTC TABLE [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)].)

No

DTC troubleshooting completed.