DTC B1081:71, B1082:71 [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)]

id0702k2816500

System malfunction location (L.H.D.)

•  B1081:71: Driver-side air mix actuator motor lock

•  B1082:71: Passenger-side air mix actuator motor lock

System malfunction location (R.H.D.)

•  B1081:71: Passenger-side air mix actuator motor lock

•  B1082:71: Driver-side air mix actuator motor lock

Detection condition

•  Air mix actuator motor lock

Fail-safe

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 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

System malfunction location (L.H.D.)	• B1081:71: Driver-side air mix actuator motor lock • B1082:71: Passenger-side air mix actuator motor lock
Detection condition	• Air mix actuator motor lock
Fail-safe	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 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

Diagnostic Procedure

STEP

INSPECTION

ACTION

1

INSPECT AIR MIX ACTUATOR CONNECTOR

•  Switch the ignition to off.

•  Disconnect the negative battery cable.
(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].)

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].)

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].)

•  Disconnect the air mix actuator connector. (See AIR MIX ACTUATOR 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 connector or terminal.

After repair procedure, go to the next step.

2

INSPECT AIR MIX ACTUATOR OPERATION

•  Disconnect the air mix actuator connector.

•  Apply battery positive voltage and connect the ground to the air mix actuator terminals B and C, and then inspect the air mix actuator.

•  Does the air mix actuator operate?

Yes

Connect the connector, then go to Step 4.

No

Go to the next step.

3

INSPECT AIR MIX LINK OPERATION

•  Remove the air mix actuator.

•  Operate the air mix link manually.

•  Does the air mix link operate smoothly?

Yes

Replace the air mix actuator. (See AIR MIX ACTUATOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)

Go to the next step.

No

Replace the air mix link and the air mix crank.

Go to the next step.

4

INSPECT AIR MIX ACTUATOR CIRCUIT FOR OPEN CIRCUIT OR SHORT TO GROUND

•  Disconnect the climate control unit connector. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)

•  Apply battery positive voltage and connect the ground to the climate control unit terminal 2E and 2G, and then inspect the air mix actuator. (Driver-side (L.H.D.) / passenger-side (R.H.D.))

•  Apply battery positive voltage and connect the ground to the climate control unit terminal 2F and 2H, and then inspect the air mix actuator. (Passenger-side (L.H.D.) / driver-side (R.H.D.))

•  Does the air mix actuator operate?

Yes

Go to the next step.

No

Repair/replace the malfunctioning vehicle wiring harness.

After repair procedure, go to the next step.

5

VERIFY CLIMATE CONTROL UNIT CONNECTOR CONDITION

•  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

VERIFY THAT SAME DTC IS NOT OUTPUT AGAIN

•  Reconnect the disconnected connectors.

•  Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].)

(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].)

•  Clear the past malfunction from memory.

•  Verify DTCs.

•  Is DTC B1081:71 or B1082:71 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 [FULL-AUTO AIR CONDITIONER].)

Go to the next step.

No

Go to the next step.

7

VERIFY THAT NO OTHER DTCs ARE PRESENT

•  Verify other DTCs displayed.

•  Are any other DTCs output?

Yes

Perform the corresponding DTC inspection.

No

DTC troubleshooting completed.

System malfunction location (L.H.D.)	• B1081:71: Driver-side air mix actuator motor lock • B1082:71: Passenger-side air mix actuator motor lock
System malfunction location (R.H.D.)	• B1081:71: Passenger-side air mix actuator motor lock • B1082:71: Driver-side air mix actuator motor lock
Detection condition	• Air mix actuator motor lock
Fail-safe	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 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	INSPECT AIR MIX ACTUATOR CONNECTOR • Switch the ignition to off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) • Disconnect the air mix actuator connector. (See AIR MIX ACTUATOR 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.
1		No	Repair/replace the connector or terminal. After repair procedure, go to the next step.
2	INSPECT AIR MIX ACTUATOR OPERATION • Disconnect the air mix actuator connector. • Apply battery positive voltage and connect the ground to the air mix actuator terminals B and C, and then inspect the air mix actuator. • Does the air mix actuator operate?	Yes	Connect the connector, then go to Step 4.
2		No	Go to the next step.
3	INSPECT AIR MIX LINK OPERATION • Remove the air mix actuator. • Operate the air mix link manually. • Does the air mix link operate smoothly?	Yes	Replace the air mix actuator. (See AIR MIX ACTUATOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].) Go to the next step.
3		No	Replace the air mix link and the air mix crank. Go to the next step.
4	INSPECT AIR MIX ACTUATOR CIRCUIT FOR OPEN CIRCUIT OR SHORT TO GROUND • Disconnect the climate control unit connector. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].) • Apply battery positive voltage and connect the ground to the climate control unit terminal 2E and 2G, and then inspect the air mix actuator. (Driver-side (L.H.D.) / passenger-side (R.H.D.)) • Apply battery positive voltage and connect the ground to the climate control unit terminal 2F and 2H, and then inspect the air mix actuator. (Passenger-side (L.H.D.) / driver-side (R.H.D.)) • Does the air mix actuator operate?	Yes	Go to the next step.
4		No	Repair/replace the malfunctioning vehicle wiring harness. After repair procedure, go to the next step.
5	VERIFY CLIMATE CONTROL UNIT CONNECTOR CONDITION • Inspect the connector and terminals (corrosion, damage, pin disconnection). • Are the connector and terminals normal?	Yes	Go to the next step.
5		No	Repair/replace the malfunctioning vehicle wiring harness, connector, or terminal. After repair procedure, go to the next step.
6	VERIFY THAT SAME DTC IS NOT OUTPUT AGAIN • Reconnect the disconnected connectors. • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) • Clear the past malfunction from memory. • Verify DTCs. • Is DTC B1081:71 or B1082:71 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 [FULL-AUTO AIR CONDITIONER].) Go to the next step.
6		No	Go to the next step.
7	VERIFY THAT NO OTHER DTCs ARE PRESENT • Verify other DTCs displayed. • Are any other DTCs output?	Yes	Perform the corresponding DTC inspection.
7		No	DTC troubleshooting completed.