DTC B1086:71 [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)]

id0702k2816700

System malfunction location

•  Airflow mode actuator motor lock

Detection condition

•  Airflow mode actuator motor lock

Fail-safe function

Malfunction determined when ignition switched ON

•  Airflow mode actuator drive signal is stopped right when the malfunction is determined.

Malfunction already exists when ignition switched ON

•  Nine seconds after the ignition is switched ON, the airflow mode actuator drive signal is output normally again. Afterwards, motor output is stopped during malfunction determination.

Possible cause

•  Connector or terminal malfunction

•  Airflow mode actuator malfunction

•  A/C unit (airflow mode link) malfunction

•  Open circuit in wiring harness between the following terminals:

―  Climate control unit terminal 1N—airflow mode actuator terminal B

―  Climate control unit terminal 2A—airflow mode actuator terminal C

―  Climate control unit terminal 1J—airflow mode actuator terminal A

―  Climate control unit terminal 2K—airflow mode actuator terminal F

―  Climate control unit terminal 2I—airflow mode actuator terminal D

•  Short to ground in wiring harness between the following terminals:

―  Climate control unit terminal 1N—airflow mode actuator terminal B

―  Climate control unit terminal 2A—airflow mode actuator terminal C

―  Climate control unit terminal 2K—airflow mode actuator terminal F

―  Climate control unit terminal 2I—airflow mode actuator terminal D

•  Short to power supply in wiring harness between the following terminals:

―  Climate control unit terminal 1N—airflow mode actuator terminal B

―  Climate control unit terminal 2A—airflow mode actuator terminal C

―  Climate control unit terminal 1J—airflow mode actuator terminal A

―  Climate control unit terminal 2K—airflow mode actuator terminal F

―  Climate control unit terminal 2I—airflow mode actuator terminal D

•  Climate control unit malfunction

System malfunction location	• Airflow mode actuator motor lock
Detection condition	• Airflow mode actuator motor lock
Fail-safe function	Malfunction determined when ignition switched ON • Airflow mode actuator drive signal is stopped right when the malfunction is determined. Malfunction already exists when ignition switched ON • Nine seconds after the ignition is switched ON, the airflow mode actuator drive signal is output normally again. Afterwards, motor output is stopped during malfunction determination.
Possible cause	• Connector or terminal malfunction • Airflow mode actuator malfunction • A/C unit (airflow mode link) malfunction • Open circuit in wiring harness between the following terminals: ― Climate control unit terminal 1N—airflow mode actuator terminal B ― Climate control unit terminal 2A—airflow mode actuator terminal C ― Climate control unit terminal 1J—airflow mode actuator terminal A ― Climate control unit terminal 2K—airflow mode actuator terminal F ― Climate control unit terminal 2I—airflow mode actuator terminal D • Short to ground in wiring harness between the following terminals: ― Climate control unit terminal 1N—airflow mode actuator terminal B ― Climate control unit terminal 2A—airflow mode actuator terminal C ― Climate control unit terminal 2K—airflow mode actuator terminal F ― Climate control unit terminal 2I—airflow mode actuator terminal D • Short to power supply in wiring harness between the following terminals: ― Climate control unit terminal 1N—airflow mode actuator terminal B ― Climate control unit terminal 2A—airflow mode actuator terminal C ― Climate control unit terminal 1J—airflow mode actuator terminal A ― Climate control unit terminal 2K—airflow mode actuator terminal F ― Climate control unit terminal 2I—airflow mode actuator terminal D • Climate control unit malfunction

Diagnostic Procedure

STEP

INSPECTION

ACTION

1

VERIFY RELATED DTC

•  Switch the ignition off.

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

•  Is DTC B1C1C:11, B1C1C:13 or U200D:11 also present?

Yes

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

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

No

Go to the next step.

2

INSPECT AIRFLOW MODE ACTUATOR CONNECTOR

•  Switch the ignition off.

•  Disconnect the negative battery cable.
(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].)

(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)].)

•  Disconnect the airflow mode actuator connector.
(See AIRFLOW MODE 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 Step 9.

3

INSPECT AIRFLOW MODE ACTUATOR

•  Inspect the airflow mode actuator.
(See AIRFLOW MODE ACTUATOR INSPECTION [FULL-AUTO AIR CONDITIONER].)

•  Is it normal?

Yes

Go to the next step.

No

Replace the airflow mode actuator.

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

Go to Step 9.

4

INSPECT AIRFLOW MODE LINK SET OPERATION

•  Operate the airflow mode link set manually.

•  Does the airflow mode link set operate smoothly?

Yes

Go to the next step.

No

Replace the airflow mode link set.

(See A/C UNIT REMOVAL/INSTALLATION.)

(See A/C UNIT DISASSEMBLY/ASSEMBLY.)

Go to Step 9.

5

INSPECT AIRFLOW MODE ACTUATOR CIRCUIT FOR OPEN CIRCUIT

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

•  Inspect for continuity between the following terminals (wiring harness-side):

―  Climate control unit terminal 2K—airflow mode actuator terminal F

―  Climate control unit terminal 2I—airflow mode actuator terminal D

•  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 airflow mode 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.

•  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 Step 9.

6

INSPECT AIRFLOW MODE ACTUATOR CIRCUIT FOR SHORT TO GROUND

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

―  Climate control unit terminal 2K

―  Climate control unit terminal 2I

•  Is there continuity?

Yes

Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal and airflow mode 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 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 Step 9.

No

Go to the next step.

7

INSPECT AIRFLOW MODE ACTUATOR CIRCUIT FOR SHORT TO POWER SUPPLY

•  Connect the negative battery cable.
(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].)

(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)].)

•  Switch the ignition on (engine off or on).

•  Measure the voltage at the following terminals (wiring harness-side):

―  Climate control unit terminal 1N

―  Climate control unit terminal 2A

―  Climate control unit terminal 1J

―  Climate control unit terminal 2K

―  Climate control unit terminal 2I

•  Is the voltage 0 V?

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 airflow mode 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 a short to power supply.

•  Repair or replace the malfunctioning part.

If there is no common connector:

•  Repair or replace the wiring harness which has a short to power supply.

Go to Step 9.

8

VERIFY CLIMATE CONTROL UNIT CONNECTOR CONDITION

•  Switch the ignition off.

•  Disconnect the negative battery cable.
(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].)

(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)].)

•  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.

9

VERIFY THAT SAME DTC IS NOT OUTPUT AGAIN

•  Reconnect the disconnected connectors.

•  Connect the negative battery cable.
(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].)

(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)].)

•  Clear the DTC from the climate control unit memory using the M-MDS.
(See CLEARING DTC [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)].)

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

•  Is the same DTC displayed?

Yes

Repeat the inspection from Step 1.

•  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.

10

VERIFY THAT NO OTHER DTCs ARE PRESENT

•  Verify other DTCs displayed.

•  Are any other DTCs displayed?

Yes

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

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

No

DTC troubleshooting completed.

STEP	INSPECTION		ACTION
1	VERIFY RELATED DTC • Switch the ignition off. • Perform the DTC inspection for the climate control unit using the M-MDS. (See DTC DISPLAY [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)].) • Is DTC B1C1C:11, B1C1C:13 or U200D:11 also present?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)].)
1		No	Go to the next step.
2	INSPECT AIRFLOW MODE ACTUATOR CONNECTOR • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (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)].) • Disconnect the airflow mode actuator connector. (See AIRFLOW MODE 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.
2		No	Repair/replace the connector or terminal. After repair procedure, go to Step 9.
3	INSPECT AIRFLOW MODE ACTUATOR • Inspect the airflow mode actuator. (See AIRFLOW MODE ACTUATOR INSPECTION [FULL-AUTO AIR CONDITIONER].) • Is it normal?	Yes	Go to the next step.
3		No	Replace the airflow mode actuator. (See AIRFLOW MODE ACTUATOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].) Go to Step 9.
4	INSPECT AIRFLOW MODE LINK SET OPERATION • Operate the airflow mode link set manually. • Does the airflow mode link set operate smoothly?	Yes	Go to the next step.
4		No	Replace the airflow mode link set. (See A/C UNIT REMOVAL/INSTALLATION.) (See A/C UNIT DISASSEMBLY/ASSEMBLY.) Go to Step 9.
5	INSPECT AIRFLOW MODE ACTUATOR CIRCUIT FOR OPEN CIRCUIT • Disconnect the climate control unit connector. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].) • Inspect for continuity between the following terminals (wiring harness-side): ― Climate control unit terminal 2K—airflow mode actuator terminal F ― Climate control unit terminal 2I—airflow mode actuator terminal D • Is there continuity?	Yes	Go to the next step.
5		No	Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal and airflow mode 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. • 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 Step 9.
6	INSPECT AIRFLOW MODE ACTUATOR CIRCUIT FOR SHORT TO GROUND • Inspect for continuity between the following terminals (wiring harness-side) and body ground: ― Climate control unit terminal 2K ― Climate control unit terminal 2I • Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal and airflow mode 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 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 Step 9.
6		No	Go to the next step.
7	INSPECT AIRFLOW MODE ACTUATOR CIRCUIT FOR SHORT TO POWER SUPPLY • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (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)].) • Switch the ignition on (engine off or on). • Measure the voltage at the following terminals (wiring harness-side): ― Climate control unit terminal 1N ― Climate control unit terminal 2A ― Climate control unit terminal 1J ― Climate control unit terminal 2K ― Climate control unit terminal 2I • Is the voltage 0 V?	Yes	Go to the next step.
7		No	Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal and airflow mode 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 a short to power supply. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to power supply. Go to Step 9.
8	VERIFY CLIMATE CONTROL UNIT CONNECTOR CONDITION • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (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)].) • Inspect the connector and terminals (corrosion, damage, pin disconnection). • Are the connector and terminals normal?	Yes	Go to the next step.
8		No	Repair/replace the connector or terminal. After repair procedure, go to the next step.
9	VERIFY THAT SAME DTC IS NOT OUTPUT AGAIN • Reconnect the disconnected connectors. • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (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)].) • Clear the DTC from the climate control unit memory using the M-MDS. (See CLEARING DTC [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)].) • Perform the DTC inspection for the climate control unit using the M-MDS. (See DTC DISPLAY [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)].) • Is the same DTC displayed?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the climate control unit. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].) Go to the next step.
9		No	Go to the next step.
10	VERIFY THAT NO OTHER DTCs ARE PRESENT • Verify other DTCs displayed. • Are any other DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)].)
10		No	DTC troubleshooting completed.