System malfunction location

• Air mix actuator motor lock

Detection condition

• Air mix actuator motor lock

Fail-safe function

Malfunction determined when IG SW at ON

• Air mix actuator drive signal is stopped right when the malfunction is determined.

Malfunction already exists when IG SW turned to ON

• Twenty seconds after the ignition is switched ON, the air mix actuator drive signal is output normally again. Afterwards, motor output is stopped during malfunction determination.

Possible cause

• Connector or terminal malfunction

• Air mix actuator malfunction

• A/C unit (air mix link and air mix crank) malfunction

• Open circuit in wiring harness between climate control unit and air mix actuator

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

• 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 air mix actuator connector.

  (See AIR MIX ACTUATOR REMOVAL/INSTALLATION [MANUAL 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 connector or terminal.

After repair procedure, go to the next step.

2

• Inspect the air mix actuator.

  (See AIR MIX ACTUATOR INSPECTION [MANUAL AIR CONDITIONER].)

• Is it normal?

Yes

Go to the next step.

No

Replace the air mix actuator.

(See AIR MIX ACTUATOR REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER].)

Go to the next step.

3

• Operate the air mix link manually.

• Does the air mix link operate smoothly?

Yes

Reconnect the disconnected connector, then go to the next step.

No

Replace the air mix link and the air mix crank.

(See A/C UNIT DISASSEMBLY/ASSEMBLY.)

Go to the next step.

4

• Disconnect the climate control unit connector.

  (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER].)

• Apply battery positive voltage and connect the ground to the climate control unit terminal X and W, and then inspect the air mix actuator.

• Does the air mix actuator operate?

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 air mix actuator terminal.

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 or short to ground.

• Repair or replace the malfunctioning part.

If there is no common connector:

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

Go to the next step.

5

• 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.

6

• Reconnect the disconnected connector.

• Connect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Clear the past malfunction from memory.

  (See CLEARING DTC [CLIMATE CONTROL UNIT (MANUAL AIR CONDITIONER)].)

• Verify DTCs.

  (See DTC DISPLAY [CLIMATE CONTROL UNIT (MANUAL AIR CONDITIONER)].)

• Is DTC B13AA:71 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 [MANUAL AIR CONDITIONER].)

Go to the next step.

No

Go to the next step.

7

• Verify other DTCs displayed.

  (See DTC DISPLAY [CLIMATE CONTROL UNIT (MANUAL AIR CONDITIONER)].)

• Are any other DTCs output?

Yes

Perform the corresponding DTC inspection.

(See DTC TABLE [CLIMATE CONTROL UNIT (MANUAL AIR CONDITIONER)].)

No

DTC troubleshooting completed.