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

id0702k2816700

With Dual Type Climate Control Unit

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 1.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) •  Disconnect the airflow mode actuator connector. (See AIRFLOW MODE ACTUATOR REMOVAL [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 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 1.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) •  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 1.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) •  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 1.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) •  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.

With Single Type Climate Control Unit

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 H—airflow mode actuator terminal B ―  Climate control unit terminal I—airflow mode actuator terminal C ―  Climate control unit terminal E—airflow mode actuator terminal A ―  Climate control unit terminal V—airflow mode actuator terminal F ―  Climate control unit terminal T—airflow mode actuator terminal D •  Short to ground in wiring harness between the following terminals: ―  Climate control unit terminal H—airflow mode actuator terminal B ―  Climate control unit terminal I—airflow mode actuator terminal C ―  Climate control unit terminal V—airflow mode actuator terminal F ―  Climate control unit terminal T—airflow mode actuator terminal D •  Short to power supply in wiring harness between the following terminals: ―  Climate control unit terminal H—airflow mode actuator terminal B ―  Climate control unit terminal I—airflow mode actuator terminal C ―  Climate control unit terminal E—airflow mode actuator terminal A ―  Climate control unit terminal V—airflow mode actuator terminal F ―  Climate control unit terminal T—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:12, 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 terminal. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) •  Disconnect the airflow mode actuator connector. (See AIRFLOW MODE ACTUATOR REMOVAL [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 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 V—airflow mode actuator terminal F ―  Climate control unit terminal T—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 I ―  Climate control unit terminal V ―  Climate control unit terminal T •  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 terminal. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) •  Switch the ignition on (engine off or on). •  Measure the voltage at the following terminals (wiring harness-side): ―  Climate control unit terminal V ―  Climate control unit terminal T •  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 terminal. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) •  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 terminal. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) •  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.