HVAC System (Auto AC) (Diagnostics): Wiring — Subaru Outback BR рестайлинг (2012-2014)

WIRING DIAGRAM

See appropriate SYSTEM WIRING DIAGRAM article.

Scheme 41

Scheme 41: OPERATION

Auto A/C

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Scheme 42

Manual A/C

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Scheme 43

Step	Check	Yes	No
1 CHECK FUSE. Turn the ignition switch to OFF. Remove fuse No. 4, 31, 7 and 12 from the fuse & relay box. Check the condition of fuse.	Is the fuse blown out?	Replace the fuse.	Go to step 2 .
2 CHECK CONNECTOR. Check the connectors (i166), (i165), (i88), (i97) and (i80) for poor contact.	Is there poor contact of connector?	Repair the connector.	Go to step 3 .
3 CHECK A/C CONTROL PANEL POWER CIRCUIT. Remove the A/C control panel. Disconnect the A/C control panel connector. Measure the voltage between A/C control panel connector terminal and chassis ground after turning the ignition switch to ON. Connector & terminal Auto A/C (i88) No. 5 (+) - Chassis ground (-): (i88) No. 6 (+) - Chassis ground (-): Manual A/C (i88) No. 1 (+) - Chassis ground (-): (i88) No. 7 (+) - Chassis ground (-)	Is the voltage 10 V or more?	Go to step 4 .	Check for open or short circuit in the harness between A/C control panel and fuse.
4 CHECK A/C CONTROL PANEL GROUND CIRCUIT. Measure the resistance of harness between A/C control panel and chassis ground after turning the ignition switch to OFF. Connector & terminal Auto A/C (i88) No. 12 - Chassis ground: Manual A/C (i88) No. 11 - Chassis ground	Is the resistance less than 10 ohms?	Go to step 5 .	Repair the harness for ground line.
5 CHECK A/C CM POWER SUPPLY CIRCUIT. Install the A/C control panel. Disconnect the A/C CM connector. Measure the voltage between A/C CM connector terminal and chassis ground after turning the ignition switch to ON. Connector & terminal (i80) No. 1 (+) - Chassis ground (-): (i80) No. 2 (+) - Chassis ground (-): (i80) No. 3 (+) - Chassis ground (-)	Is the voltage 10 V or more?	Go to step 6 .	Check for open or short circuit in the harness between A/C CM and fuse.
6 CHECK A/C CM GROUND CIRCUIT. Measure the resistance of harness between A/C CM and chassis ground. Connector & terminal (i80) No. 6 - Chassis ground	Is the resistance less than 5 ohms?	Go to step 7 .	Repair the harness for ground line.
7 CHECK COMMUNICATION CIRCUIT. Measure the resistance of harness between A/C control panel and air conditioner control module. Connector & terminal Auto A/C (i88) No. 10 - (i80) No. 18: (i88) No. 4 - (i80) No. 7: Manual A/C (i88) No. 6 - (i80) No. 18: (i88) No. 12 - (i80) No. 7	Is there continuity?	Go to step 8 .	Repair the harness.
8 CHECK COMMUNICATION CIRCUIT HARNESS. Measure the resistance between communication circuit harness and chassis ground. Connector & terminal (i80) No. 18 - Chassis ground: (i80) No. 7 - Chassis ground	Is there continuity?	Repair or replace the short circuit of the harness.	Go to step 9 .
9 CHECK HARNESS. Using a tester, check continuity between terminals. Connector & terminal (i80) No. 18 - No. 7	Is there continuity?	Repair or replace the short circuit of the harness.	Go to step 10 .
10 CHECK A/C CONTROL PANEL. Turn the ignition switch to OFF. Replace the A/C control panel with a properly functioning part.	Does the A/C control panel operate normally?	Since the A/C control panel has an internal error, replace A/C control panel with a new one. Refer to REMOVAL .	Since the A/C CM has an internal error, replace A/C CM with a new one. Refer to REMOVAL .

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Scheme 44

Scheme 44: WIRING DIAGRAM

Step	Check	Yes	No
1 CHECK BLOWER OPERATION. Using Subaru Select Monitor, display the following data in "Read Current Data". Air mix door actuator position (driver's side) Air mix door actuator position (passenger's side) (with left/right independent air conditioner) Blower Fan Level Set the temperature control switch to MAX COOL, and increase or decrease the A/C control panel fan switch. (For vehicles with left/right independent air conditioner, perform setting on both sides.)	Do "Air mix door actuator position (driver's side)" and "Air mix door actuator position (passenger's side)" (with left/right independent air conditioner) indicate "0%"? Does "Blower Fan Level" increase or decrease in accordance with the fan switch operation?	Go to step 2 .	Go to step 5 .
2 CHECK AIRFLOW CAPACITY. Set the temperature control switch to LO (For vehicles with left/right independent air conditioner, perform setting on both seats.), and set the fan switch of the A/C control panel to MAX and set the FRESH/RECIRC switch to RECIRC.	Is the airflow capacity insufficient for the same model?	Go to step 3 .	System is normal.
3 CHECK A/C FILTER. Check the A/C filter. Refer to INSPECTION .	Is the A/C filter normal?	Go to step 4 .	Clean or replace the A/C filter.
4 CHECK EACH DUCT. Check each duct joint for disconnection or clogging. Refer to INSPECTION , Air Vent Grille. Refer to INSPECTION , Heater Duct. Refer to INSPECTION , Heater Vent Duct.	Is each duct normal?	Go to step 5 .	Repair the faulty duct.
5 CHECK A/C CONTROL PANEL. Turn the ignition switch to ON. Set the fan switch to maximum position. Using the Subaru Select Monitor, check "Blower Fan Level" of the current data from the A/C diagnosis.	Does "Blower Fan Level" indicate "31"?	Go to step 6 .	Replace the A/C control panel. Refer to REMOVAL .
6 CHECK A/C CONTROL PANEL. Set the fan switch to minimum position. Using the Subaru Select Monitor, check "Blower Fan Level" of the current data from the A/C diagnosis.	Does "Blower Fan Level" indicate "1"?	Go to step 7 .	Replace the A/C control panel. Refer to REMOVAL .
7 CHECK CONNECTOR. Check the connectors (i80) and (i181) for poor contact.	Is there poor contact of connector?	Repair the connector.	Go to step 8 .
8 CHECK FUSE. Remove fuse No. 22 and 7 from fuse & relay box, and fuse No. 4 and 5 from the main fuse box. Check the condition of fuse.	Is the fuse blown out?	Replace the fuse.	Go to step 9 .
9 CHECK BLOWER MOTOR RELAY ON SIGNAL. Stop the engine. Turn the fan switch to OFF. Turn the ignition switch to ON. Using a tester, measure the voltage between the A/C CM connector (i181) and chassis ground. Connector & terminal (i181) No. 20 (+) - Chassis ground (-)	Is the voltage 10 V or more?	Go to step 10 .	Check for an open or short circuit in the harness between the F/B fuse No. 22 and ECM. Check the blower relay connector and relay unit. Refer to CHECK RELAY .
10 CHECK BLOWER MOTOR RELAY ON SIGNAL. Start the engine. Turn the fan switch to ON. Using a tester, measure the voltage between the A/C CM connector (i181) and chassis ground. Connector & terminal (i181) No. 20 (+) - Chassis ground (-)	Is the voltage 0 V?	Go to step 11 .	Replace the A/C CM. Refer to REMOVAL .
11 CHECK BLOWER MOTOR POWER SUPPLY CIRCUIT. Turn the ignition switch to ON. Turn the fan switch to ON. Use a tester, measure the voltage between the blower motor connector (i185) and chassis ground. Connector & terminal (i185) No. 2 (+) - Chassis ground (-)	Is the voltage 10 V or more?	Go to step 12 .	Check for an open in the blower motor power supply line harness and for disconnection of the connectors (B38) and (i3). Check the blower relay connector and relay unit. Refer to CHECK RELAY .
12 CHECK BLOWER MOTOR UNIT. Check the blower motor. Refer to INSPECTION .	Is the blower motor OK?	Go to step 13 .	Replace the blower motor. Refer to REMOVAL .
13 CHECK HARNESS. Disconnect the power transistor and A/C CM connector. Using a tester, measure the resistance between harness terminals. Connector & terminal (i185) No. 1 - (i183) No. 5: (i183) No. 3 - (i181) No. 8: (i183) No. 1 - (i181) No. 9: (i183) No. 4 - Chassis ground	Is the resistance less than 1 ohms?	Go to step 14 .	Repair or replace the open circuit of harness.
14 CHECK HARNESS . Use a tester to measure the resistance of harness between the power transistor connector (i183) and chassis ground. Connector & terminal (i183) No. 1 - Chassis ground: (i183) No. 3 - Chassis ground	Is the resistance less than 1 ohms?	Repair or replace the short circuit of the harness.	Go to step 15 .
15 CHECK POWER TRANSISTOR. Replace the power transistor with a properly functioning part.	Does the blower motor rotate?	Replace the power transistor. Refer to REMOVAL .	Replace the A/C CM Refer to REMOVAL .

Manual A/C

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Scheme 45

Scheme 45: WIRING DIAGRAM

Step	Check	Yes	No
1 CHECK BLOWER OPERATION. Set the temperature control dial to MAX COOL, and increase or decrease the fan dial.	Does the airflow capacity increase or decrease in accordance with the dial operation?	Go to step 2 .	Go to step 5 .
2 CHECK AIRFLOW CAPACITY. Set the temperature control switch to MAX COOL, set the fan switch to MAX and set the FRESH/RECIRC switch to RECIRC.	Is the airflow capacity insufficient for the same model?	Go to step 3 .	System is normal.
3 CHECK A/C FILTER. Check the A/C filter. Refer to INSPECTION .	Is the A/C filter normal?	Go to step 4 .	Clean or replace the A/C filter.
4 CHECK EACH DUCT. Check each duct joint for disconnection or clogging. Refer to INSPECTION , Air Vent Grille. Refer to INSPECTION , Heater Duct. Refer to INSPECTION , Heater Vent Duct.	Is each duct normal?	Go to step 5 .	Repair the faulty duct.
5 CHECK CONNECTOR. Check the connectors (i184), (i185), (i182), (i15) and (B38) for poor contact.	Is there poor contact of connector?	Repair the connector.	Go to step 6 .
6 CHECK FUSE. Remove the fuse No. 22 of the fuse & relay box and the fuses No. 4 and No. 5 of the main fuse box. Check the condition of fuse.	Is the fuse blown out?	Replace the fuse.	Go to step 7 .
7 CHECK BLOWER MOTOR RELAY ON SIGNAL. Stop the engine. Turn the fan switch to OFF. Turn the ignition switch to ON. Use a tester to measure the voltage between the blower fan switch and chassis ground. Connector & terminal (i15) No. 4 (+) - Chassis ground (-)	Is the voltage 10 V or more?	Go to step 8 .	Check for an open or short circuit between the F/B fuse No. 22 and blower fan switch. Check the blower relay connector and relay unit.
8 CHECK BLOWER MOTOR RELAY ON SIGNAL. Start the engine. Turn the fan switch to OFF. Turn the ignition switch to ON. Use a tester to measure the voltage between the blower fan switch and chassis ground. Connector & terminal (i15) No. 4 (+) - Chassis ground (-)	Is the voltage 0 V?	Go to step 9 .	Replace the A/C control panel. Refer to MANUAL A/C MODEL .
9 CHECK BLOWER MOTOR POWER SUPPLY. Turn the ignition switch to ON. Turn the blower switch to ON. Use a tester to measure the voltage between the blower motor connector and chassis ground. Connector & terminal (i185) No. 2 (+) - Chassis ground (-)	Is the voltage 10 V or more?	Go to step 10 .	Check for an open in the blower motor power supply harness, and check the connectors (B38) and (i3). Check the blower relay connector and relay unit.
10 CHECK BLOWER MOTOR. Check the blower motor. Refer to INSPECTION .	Is the blower motor OK?	Go to step 11 .	Replace the blower motor. Refer to REMOVAL .
11 CHECK HARNESS. Disconnect the connector from blower motor, blower resistor and blower fan switch. Use a tester to measure the resistance of the harness between terminals. Connector & terminal (i185) No. 1 - (i182) No. 4: (i185) No. 1 - (i15) No. 4: (i182) No. 1 - (i15) No. 2: (i182) No. 2 - (i15) No. 6: (i182) No. 1 - (i15) No. 3	Is the resistance less than 1 ohms?	Go to step 12 .	Repair or replace the open circuit of harness.
12 CHECK BLOWER RESISTOR. Check the blower resistor. Refer to INSPECTION .	Is the blower resistor OK?	Replace the A/C control panel. Refer to MANUAL A/C MODEL .	Replace the blower resistor. Refer to REMOVAL .

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Step	Check	Yes	No
1 CHECK A/C CONTROL PANEL. Turn the ignition switch to ON. Set the fan switch to maximum position. Using the Subaru Select Monitor, check "Blower Fan Level" of the current data from the A/C diagnosis.	Does "Blower Fan Level" indicate "31"?	Go to step 2 .	Replace the A/C control panel. Refer to REMOVAL .
2 CHECK A/C CONTROL PANEL. Set the fan switch to minimum position. Using the Subaru Select Monitor, check "Blower Fan Level" of the current data from the A/C diagnosis.	Does "Blower Fan Level" indicate "1"?	Go to step 3 .	Replace the A/C control panel. Refer to REMOVAL .
3 CHECK HARNESS. Turn the ignition switch to OFF. Disconnect the power transistor connector. Use a tester to measure the resistance between the power transistor connector and chassis ground. Connector & terminal (i183) No. 5 - Chassis ground	Is the resistance less than 1 ohms?	Repair or replace the short circuit portion of the harness (i183) No. 5 - (i185) No. 1 between blower motor and power transistor.	Go to step 4 .
4 CHECK HARNESS. Remove the A/C CM. Turn the ignition switch to ON. Use a tester to measure the resistance between the power transistor connector and chassis ground. Connector & terminal (i183) No. 1 - Chassis ground	Is the resistance less than 1 ohms?	Repair or replace the short circuit portion of the harness (i183) No. 1 - (i181) No. 9 between A/C CM and power transistor.	Go to step 5 .
5 CHECK HARNESS. Connect the disconnected connectors. Turn the ignition switch to ON. Use a tester to measure the voltage between the power transistor connector and chassis ground. Connector & terminal (i183) No. 1 (+) - Chassis ground (-)	Is the voltage approx. 10 V when the fan switch is set to 1st, and approx. 1 V when set to 6th?	Replace the power transistor. Refer to REMOVAL .	Go to step 6 .
6 CHECK A/C CM. Turn the fan switch to OFF. Disconnect the power transistor connector. Use a tester to measure the resistance between the power transistor connector and chassis ground. Connector & terminal (i183) No. 1 - Chassis ground	When the fan switch is OFF and other than OFF, does the resistance change?	Replace the power transistor. Refer to REMOVAL .	Replace the A/C CM. Refer to REMOVAL .

Manual A/C

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Scheme 46

Scheme 46: WIRING DIAGRAM

Step	Check	Yes	No
1 CHECK BLOWER MOTOR CIRCUIT. Turn the ignition switch to OFF. Disconnect the blower fan switch connector and blower resistor connector. Use a tester to measure the resistance between each terminal and chassis ground. Connector & terminal (i182) No. 4 - Chassis ground: (i15) No. 5 - Chassis ground: (i15) No. 6 - Chassis ground: (i15) No. 3 - Chassis ground: (i15) No. 2 - Chassis ground	Is the resistance less than 1 ohms?	Repair or replace the short circuit of the harness.	Go to step 2 .
2 CHECK BLOWER RESISTOR. Check the blower resistor. Refer to INSPECTION .	Is the blower resistor OK?	Replace the A/C control panel. Refer to MANUAL A/C MODEL .	Replace the blower resistor. Refer to REMOVAL .

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Scheme 47

Scheme 47: WIRING DIAGRAM

Step	Check	Yes	No
1 CHECK A/C CONTROL PANEL. Leave the vehicle under the condition at ambient temperature of 15°C (59°F) or more. Turn the ignition switch to ON. Set the fan switch to maximum position. Press the A/C switch.	Is "A/C" displayed on the A/C control panel? Or does the A/C switch indicator illuminate?	Go to step 2 .	Replace the A/C control panel. Refer to REMOVAL .
2 CHECK VARIABLE FLOW CHANGE SOLENOID DUTY VALUE. Using the Subaru Select Monitor, check "Variable Flow Change Solenoid Duty" of the current data from the A/C diagnosis.	Does the data indicate the value greater than zero?	Go to step 7 .	Go to step 3 .
3 CHECK EVAPORATOR SENSOR. Using the Subaru Select Monitor, check "Evaporator Temp." of the current data from the A/C diagnosis.	Does the data indicate -0.5 degree or more?	Go to step 5 .	Go to step 4 .
4 CHECK EVAPORATOR SENSOR. Check the evaporator sensor. Refer to INSPECTION .	Is the sensor normal?	Go to step 5 .	Replace the evaporator sensor.
5 CHECK REFRIGERANT PRESSURE SENSOR. Using the Subaru Select Monitor, check "Refrigerant Pressure" of the current data from the A/C diagnosis.	Does the data indicate 0.21 Mpa - 3.03 Mpa?	Go to step 7 .	Go to step 6 .
6 CHECK AMOUNT OF REFRIGERANT PRESSURE. Check the refrigerant pressure. Refer to CHECK REFRIGERANT GAS PRESSURE .	Is the refrigerant pressure normal?	Go to step 7 .	Perform repair according to refrigerant pressure inspection.
7 CHECK FLOW SENSOR CIRCUIT. Turn the ignition switch to ON. Wait at least 1 seconds. Read the DTC using Subaru Select Monitor.	Are B1641 and B1642 displayed?	Perform the diagnosis according to DTC.	Go to step 8 .
8 CHECK VARIABLE SOLENOID CIRCUIT. Start the engine. Turn the A/C switch to ON. Set the fan switch to maximum position. Set the temperature control switch to LO, and wait for 30 seconds or more. Read the DTC using Subaru Select Monitor.	Is B1643 displayed?	Perform the diagnosis according to DTC.	Replace the compressor. Refer to REMOVAL .

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Scheme 48

Scheme 48: WIRING DIAGRAM

Step	Check	Yes	No
1 VISUALLY CHECK FRESH/RECIRC DOOR OPERATION. Remove the glove box. Refer to REMOVAL . Operate the FRESH/RECIRC switch, and visually check the intake door operation.	Does the intake door operate normally?	Is the position between the intake door and intake door case sealed completely? System is normal.	Go to step 2 .
2 CHECK A/C CONTROL PANEL. Turn the ignition switch to ON. Using the Subaru Select Monitor, check "Fresh/Recircle Air Door Actuator Position Target" of the current data from the A/C diagnosis. Operate the FRESH/RECIRC switch.	Does "Fresh/Recircle Air Door Actuator Position Target" indicate 0 <--> 100?	Go to step 3 .	Replace the A/C control panel. Refer to REMOVAL .
3 CHECK CONNECTOR. Check the connecting condition of connectors (i186), (i181) and (i80).	Is there poor contact?	Repair the connector.	Go to step 4 .
4 CHECK FUSE. Remove the fuse No. 7 and No. 22 from fuse & relay box. Check the fuse.	Is the fuse OK?	Go to step 5 .	Replace the fuse.
5 CHECK POWER SUPPLY FOR INTAKE DOOR ACTUATOR. Turn the ignition switch to OFF. Disconnect the intake door actuator connector (i186). Turn the ignition switch to ON. Measure the voltage between intake door actuator connector (i186) and chassis ground. Connector & terminal (i186) No. 7 (+) - Chassis ground (-)	Is the voltage 10 V or more?	Go to step 6 .	Check for open or short circuit in the harness between intake door actuator and fuse.
6 CHECK HARNESS BETWEEN A/C CM AND INTAKE DOOR ACTUATOR. Turn the ignition switch to OFF. Disconnect the A/C CM connector (i181). Measure the resistance between intake door actuator connector (i186) and A/C CM connector (i181). Connector & terminal (i186) No. 1 - (i181) No. 3: (i186) No. 3 - (i181) No. 6	Is the resistance less than 10 ohms?	Go to step 7 .	Repair the open circuit of harness between A/C CM and intake door actuator.
7 CHECK OPERATION OF INTAKE DOOR ACTUATOR. Connect the intake door actuator connector (i186). Ground the A/C CM connector (i181) with a suitable wire. Turn the ignition switch to ON, and check the operation of intake door actuator. Connector & terminal (i181) No. 3 - Chassis ground	Does the actuator move to the FRESH side?	Go to step 8 .	Replace the intake door actuator. Refer to REMOVAL .
8 CHECK OPERATION OF INTAKE DOOR ACTUATOR. Turn the ignition switch to OFF. Ground the A/C CM connector (i181) with a suitable wire. Turn the ignition switch to ON, and check the operation of intake door actuator. Connector & terminal: (i181) No. 6 - Chassis ground	Does the actuator move to the RECIRC side?	Replace the A/C CM. Refer to REMOVAL .	Replace the intake door actuator. Refer to REMOVAL .

Clearance Light and Illumination Light System. See appropriate SYSTEM WIRING DIAGRAM article.

Scheme 49

Scheme 49: WIRING DIAGRAM

Step	Check	Yes	No
1 CHECK CONNECTOR. Check for poor contact of connector.	Is there poor contact?	Repair the connector.	Go to step 2 .
2 CHECK HARNESS. Turn the ignition switch to ON. Using a tester, measure the voltage between the A/C control panel connector (i88) and chassis ground. Connector & terminal Auto A/C (i88) No. 3 (+) - Chassis ground (-): Manual A/C (i88) No. 2 (+) - Chassis ground (-)	Is the voltage 10 V or more?	Go to step 3 .	Repair or replace the open circuit of harness.
3 CHECK HARNESS. Turn the ignition switch to OFF. Measure the resistance between A/C control panel connector (i88) and body integrated unit connector (i84). Connector & terminal Auto A/C (i88) No. 9 - (i84) No. 16: Manual A/C (i88) No. 10 - (i84) No. 16	Is the resistance less than 10 ohms?	Go to step 4 .	Repair or replace the open circuit of harness.
4 CHECK A/C CONTROL PANEL UNIT. Check the A/C control panel. Refer to INSPECTION .	Is A/C control panel OK?	A/C control panel illumination circuit is normal.	Replace the A/C control panel. Refer to REMOVAL .

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Scheme 50

Scheme 50: WIRING DIAGRAM

Step	Check	Yes	No
1 CHECK CONNECTOR. Check the condition of connector connection. Read the DTC using Subaru Select Monitor.	Is B1601 displayed?	Go to step 2 .	Check the connection of the in-vehicle sensor circuit.
2 CHECK IN-VEHICLE SENSOR. Disconnect the in-vehicle sensor. Refer to REMOVAL . Read the DTC of the A/C ECM using the Subaru Select Monitor.	Is B1602 displayed?	Replace the in-vehicle sensor. Refer to REMOVAL .	Go to step 3 .
3 CHECK HARNESS. Turn the ignition switch to ON. Using the tester, measure the voltage between terminals. Connector & terminal (i173) No. 2 (+) - No. 1 (-)	Is the voltage 4.5 - 5.0 V?	Check the connection of the in-vehicle sensor circuit.	Go to step 4 .
4 CHECK HARNESS. Disconnect the connector from A/C CM. Using a tester, check continuity between terminals. Connector & terminal (i173) No. 1 - No. 2	Is there continuity?	Repair or replace the short circuit of the harness.	Replace the A/C CM. Refer to REMOVAL .

DIAGNOSTIC PROCEDURE

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Step	Check	Yes	No
1 CHECK CONNECTOR. Check the condition of connector connection. Read the DTC using Subaru Select Monitor.	Is B1602 displayed?	Go to step 2 .	Check the connection of the in-vehicle sensor circuit.
2 CHECK IN-VEHICLE SENSOR. Disconnect the in-vehicle sensor. Short the connector i173. Read the DTC of the A/C ECM using the Subaru Select Monitor.	Is B1601 displayed?	Replace the in-vehicle sensor. Refer to REMOVAL .	Go to step 3 .
3 CHECK HARNESS. Turn the ignition switch to ON. Using the tester, measure the voltage between terminals. Connector & terminal (i173) No. 2 (+) - No. 1 (-)	Is the voltage 4.5 - 5.0 V?	Go to step 4 .	Repair or replace the open circuit of harness.
4 CHECK HARNESS. Disconnect the connector from A/C CM. Using a tester, check continuity between terminals. Connector & terminal (i173) No. 1 - (i181) No. 1: (i173) No. 2 - (i80) No. 11	Is there continuity?	Replace the A/C CM. Refer to REMOVAL .	Repair or replace the open circuit of harness.

DIAGNOSTIC PROCEDURE

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Scheme 51

Scheme 51: WIRING DIAGRAM

Step	Check	Yes	No
1 CHECK CONNECTOR. Check the condition of connector connection. Read the DTC using Subaru Select Monitor.	Is B1603 displayed?	Go to step 2 .	Check the connection of the evaporator sensor circuit.
2 CHECK EVAPORATOR SENSOR. Disconnect the evaporator sensor. Read the DTC of the A/C ECM using the Subaru Select Monitor.	Is B1604 displayed?	Replace the evaporator sensor. Refer to REMOVAL .	Go to step 3 .
3 CHECK HARNESS. Turn the ignition switch to ON. Using the tester, measure the voltage between terminals. Connector & terminal (i172) No. 1 (+) - No. 2 (-)	Is the voltage 4.5 - 5.0 V?	Check the connection of the evaporator sensor circuit.	Go to step 4 .
4 CHECK HARNESS. Disconnect the connector from A/C CM. Using a tester, check continuity between terminals. Connector & terminal (i172) No. 1 - No. 2	Is there continuity?	Repair or replace the short circuit of the harness.	Replace the A/C CM. Refer to REMOVAL .

DIAGNOSTIC PROCEDURE

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Step	Check	Yes	No
1 CHECK CONNECTOR. Check the condition of connector connection. Read the DTC using Subaru Select Monitor.	Is B1604 displayed?	Go to step 2 .	Check the connection of the evaporator sensor circuit.
2 CHECK EVAPORATOR SENSOR. Disconnect the evaporator sensor. Short the i172 connector. Read the DTC of the A/C ECM using the Subaru Select Monitor.	Is B1603 displayed?	Replace the evaporator sensor. Refer to REMOVAL .	Go to step 3 .
3 CHECK HARNESS. Turn the ignition switch to ON. Using the tester, measure the voltage between terminals. Connector & terminal (i172) No. 1 (+) - No. 2 (-)	Is the voltage 4.5 - 5.0 V?	Go to step 4 .	Repair or replace the open circuit of harness.
4 CHECK HARNESS. Disconnect the connector from A/C CM. Using a tester, check continuity between terminals. Connector & terminal (i172) No. 1 - (i80) No. 21: (i172) No. 2 - (i181) No. 1	Is there continuity?	Replace the A/C CM. Refer to REMOVAL .	Repair or replace the open circuit of harness.

DIAGNOSTIC PROCEDURE

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Scheme 52

Scheme 52: WIRING DIAGRAM

Step	Check	Yes	No
1 CHECK CONNECTOR. Check the condition of connector connection. Read the DTC using Subaru Select Monitor.	Is B1605 displayed?	Go to step 2 .	Check the connection of the refrigerant pressure sensor circuit.
2 CHECK PRESSURE SENSOR. Disconnect the pressure sensor. Short No. 1 and No. 2 of B505 connector. Read the DTC of the A/C ECM using the Subaru Select Monitor.	Is B1606 displayed?	Replace the refrigerant pressure sensor. Refer to REMOVAL .	Go to step 3 .
3 CHECK HARNESS. Turn the ignition switch to ON. Using the tester, measure the voltage between terminals. Connector & terminal (B505) No. 3 (+) - No. 1 (-)	Is the voltage 4.5 - 5.0 V?	Go to step 4 .	Repair or replace the open circuit of harness.
4 CHECK HARNESS. Disconnect the connector from A/C CM. Using a tester, check continuity between terminals. Connector & terminal (B505) No. 1 - (i181) No. 1: (B505) No. 2 - (i80) No. 22: (B505) No. 3 - (i80) No. 16	Is there continuity?	Replace the A/C CM. Refer to REMOVAL .	Repair or replace the open circuit of harness.

DIAGNOSTIC PROCEDURE

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Step	Check	Yes	No
1 CHECK CONNECTOR. Check the condition of connector connection. Read the DTC using Subaru Select Monitor.	Is B1606 displayed?	Go to step 2 .	Check the connection of the refrigerant pressure sensor circuit.
2 CHECK REFRIGERANT PRESSURE SENSOR. Disconnect the refrigerant pressure sensor. Read the DTC of the A/C ECM using the Subaru Select Monitor.	Is B1605 displayed?	Replace the refrigerant pressure sensor. Refer to REMOVAL .	Go to step 3 .
3 CHECK HARNESS. Disconnect the connector from A/C CM. Using a tester, check continuity between terminals. Connector & terminal (B505) No. 1 - No. 2: (B505) No. 2 - Chassis ground	Is there continuity?	Repair or replace the short circuit of the harness.	Replace the A/C CM. Refer to REMOVAL .

DIAGNOSTIC PROCEDURE

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Scheme 53

Scheme 53: WIRING DIAGRAM

Step	Check	Yes	No
1 CHECK CONNECTOR. Check the condition of connector connection. Read the DTC using Subaru Select Monitor.	Is B1607 displayed?	Go to step 2 .	Check the connection of the sunload sensor circuit.
2 CHECK SUNLOAD SENSOR. Disconnect the sunload sensor. Read the DTC of the A/C ECM using the Subaru Select Monitor.	Is B1608 displayed?	Replace the sunload sensor. Refer to REMOVAL .	Go to step 3 .
3 CHECK HARNESS. Turn the ignition switch to ON. Using the tester, measure the voltage between terminals. Connector & terminal (i194) No. 3 (+) - No. 1 (-)	Is the voltage 10 V or more?	Check the connection of the sunload sensor circuit.	Go to step 4 .
4 CHECK HARNESS. Disconnect the connector from A/C CM. Using a tester, check continuity between terminals. Connector & terminal (i194) No. 3 - 1	Is there continuity?	Repair or replace the short circuit of the harness.	Replace the A/C CM. Refer to REMOVAL .

DIAGNOSTIC PROCEDURE

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Step	Check	Yes	No
1 CHECK CONNECTOR. Read the DTC of the A/C CM using the Subaru Select Monitor.	Is B1608 displayed?	Go to step 2 .	Check the connection of the sunload sensor circuit.
2 CHECK HARNESS. Disconnect the sunload sensor. Using a tester, check continuity between terminals. Connector & terminal (i194) No. 6 - Chassis ground	Is there continuity?	Go to step 3 .	Repair or replace the open circuit of harness.
3 CHECK HARNESS. Turn the ignition switch to ON. Using the tester, measure the voltage between terminals. Connector & terminal (i194) No. 3 (+) - No. 6 (-)	Is the voltage 10.0 - 14.0 V?	Go to step 4 .	Repair or replace the open circuit of harness.
4 CHECK SUNLOAD SENSOR. Connect the sunload sensor. Turn the ignition switch to ON. Using the tester, measure the voltage between terminals. CAUTION: Because the sensor may not respond to weak light, use incandescent light for the inspection and bring it to 30 cm or less from the sensor. Connector & terminal (i194) No. 1 (+) - No. 6 (-)	0.8 V or less with no direct sunlight (covering the sensor with cloth), & 0.8 - 4.3 V±0.3 V (according to the intensity of the light) with the inspection light brought closer	Go to step 5 .	Replace the sunload sensor. Refer to REMOVAL .
5 CHECK HARNESS. Disconnect the sunload sensor. Disconnect the connector from A/C CM. Using a tester, check continuity between terminals. Connector & terminal (i194) No. 1 - (i80) No. 24	Is there continuity?	Go to step 6 .	Repair or replace the open circuit of harness.
6 CHECK HARNESS. Using a tester, check continuity between terminals. Connector & terminal (i194) No. 3 - (B280) No. 9	Is there continuity?	Repair or replace the open circuit of harness.	Replace the A/C CM. Refer to REMOVAL .

CAUTION
Because the sensor may not respond to weak light, use incandescent light for the inspection and bring it to 30 cm or less from the sensor.

DIAGNOSTIC PROCEDURE

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Scheme 54

Scheme 54: WIRING DIAGRAM

Step	Check	Yes	No
1 CHECK CONNECTOR. Check the condition of connector connection. Read the DTC using Subaru Select Monitor.	Is B1610 displayed?	Go to step 2 .	Repair the poor connection of the connector.
2 CHECK ACTUATOR. Disconnect the air mix door actuator (driver's). Short No. 3 and No. 5 of i174 connector. Read the DTC using Subaru Select Monitor.	Is B1611 displayed?	Replace the air mix door actuator (driver's). Refer to REMOVAL .	Go to step 3 .
3 CHECK HARNESS. Turn the ignition switch to ON. Using the tester, measure the voltage between terminals. Connector & terminal (i174) No. 1 (+) - No. 3 (-)	Is the voltage 4.5 - 5.0 V?	Go to step 4 .	Repair or replace the open circuit of harness.
4 CHECK HARNESS. Disconnect the connector from A/C CM. Using a tester, check continuity between terminals. Connector & terminal (i174) No. 1 - (i80) No. 16: (i174) No. 3 - (i80) No. 1: (i174) No. 5 - (i80) No. 14	Is there continuity?	Replace the A/C CM. Refer to REMOVAL .	Repair or replace the open circuit of harness.

DIAGNOSTIC PROCEDURE

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Scheme 55

Scheme 55: WIRING DIAGRAM

Step	Check	Yes	No
1 CHECK CONNECTOR. Check the condition of connector connection. Read the DTC using Subaru Select Monitor.	Is B1611 displayed?	Go to step 2 .	Repair the poor contact of connector.
2 CHECK ACTUATOR. Disconnect the air mix door actuator (driver's). Read the DTC using Subaru Select Monitor.	Is B1610 displayed?	Replace the air mix door actuator (driver's). Refer to REMOVAL .	Go to step 3 .
3 CHECK HARNESS. Disconnect the connector from A/C CM. Using a tester, check continuity between terminals. Connector & terminal (i174) No. 3 - (i174) No. 5: (i174) No. 5 - Chassis ground	Is there continuity?	Repair or replace the short circuit of the harness.	Replace the A/C CM. Refer to REMOVAL .

DIAGNOSTIC PROCEDURE

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Step	Check	Yes	No
1 CHECK CONNECTOR. Check the condition of connector connection. Read the DTC using Subaru Select Monitor.	Is B1612 displayed?	Go to step 2 .	Repair the poor contact of connector.
2 CHECK CURRENT DATA. Using the Subaru Select Monitor, change the setting of "Airmix Dr Act Trgt Open Angle (Driver's)" from the A/C diagnosis and perform the active test.	Did the actuator move to the specified target opening angle?	Air mix door actuator circuit is normal.	Go to step 3 .
3 CHECK HARNESS. Turn the ignition switch to ON. Using the tester, measure the voltage between terminals. Connector & terminal (i174) No. 1 (+) - No. 3 (-)	Is the voltage 4.5 - 5.0 V?	Go to step 4 .	Repair or replace the open, short circuit of the harness.
4 CHECK HARNESS. Disconnect the connector from A/C CM. Using a tester, check continuity between terminals. Connector & terminal (i174) No. 5 - (i80) No. 14: (i174) No. 1 - (i80) No. 16: (i174) No. 3 - (i181) No. 1: (i174) No. 6 - (i181) No. 21: (i174) No. 7 - (i181) No. 22	Is there continuity?	Go to step 5 .	Repair or replace the open circuit of harness.
5 CHECK AIR MIX DOOR ACTUATOR. Check the air mix door actuator parts. Refer to INSPECTION .	Is air mix door actuator normal?	Replace the A/C CM. Refer to REMOVAL .	Replace the air mix door actuator. Refer to REMOVAL .

DIAGNOSTIC PROCEDURE

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Scheme 56

Scheme 56: WIRING DIAGRAM

Step	Check	Yes	No
1 CHECK CONNECTOR. Check the condition of connector connection. Read the DTC using Subaru Select Monitor.	Is B1613 displayed?	Go to step 2 .	Repair the poor contact of connector.
2 CHECK ACTUATOR. Disconnect the air mix door actuator (passenger's). Short No. 1 and No. 5 of connector i175. Read the DTC using Subaru Select Monitor.	Is B1614 displayed?	Replace the air mix door actuator (passenger's). Refer to REMOVAL .	Go to step 3 .
3 CHECK HARNESS. Turn the ignition switch to ON. Using the tester, measure the voltage between terminals. Connector & terminal (i175) No. 3 (+) - No. 1 (-)	Is the voltage 4.5 - 5.0 V?	Go to step 4 .	Repair or replace the open circuit of harness.
4 CHECK HARNESS. Disconnect the connector from A/C CM. Using the tester, measure the voltage between terminals. Connector & terminal (i175) No. 1 - (i181) No. 1: (i175) No. 3 - (i80) No. 16: (i175) No. 5 - (i80) No. 25	Is there continuity?	Replace the A/C CM. Refer to REMOVAL .	Repair or replace the open circuit of harness.

DIAGNOSTIC PROCEDURE

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Step	Check	Yes	No
1 CHECK CONNECTOR. Check the condition of connector connection. Read the DTC using Subaru Select Monitor.	Is B1614 displayed?	Go to step 2 .	Repair the poor contact of connector.
2 CHECK ACTUATOR. Disconnect the air mix door actuator (passenger's). Read the DTC of the A/C ECM using the Subaru Select Monitor.	Is B1613 displayed?	Replace the air mix door actuator (passenger's). Refer to REMOVAL .	Go to step 3 .
3 CHECK HARNESS. Turn the ignition switch to ON. Using the tester, measure the voltage between terminals. Connector & terminal (i175) No. 3 (+) - No. 1 (-)	Is the voltage 4.5 - 5.0 V?	Go to step 4 .	Repair or replace the open circuit of harness.
4 CHECK HARNESS. Disconnect the connector from A/C CM. Using a tester, check continuity between terminals. Connector & terminal (i175) No. 1 - No. 5: (i175) No. 5 - Chassis ground	Is there continuity?	Repair or replace the short circuit of the harness.	Replace the A/C CM. Refer to REMOVAL .

DIAGNOSTIC PROCEDURE

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Step	Check	Yes	No
1 CHECK CONNECTOR. Check the condition of connector connection. Read the DTC using Subaru Select Monitor.	Is B1615 displayed?	Go to step 2 .	Repair the poor contact of connector.
2 CHECK CURRENT DATA. Using the Subaru Select Monitor, change the setting of "Airmix Dr Act Trgt Open Angle (Pas's)" from the A/C diagnosis and perform the active test.	Did the actuator move to the specified target opening angle?	Air mix door actuator circuit is normal.	Go to step 3 .
3 CHECK HARNESS. Turn the ignition switch to ON. Using the tester, measure the voltage between terminals. Connector & terminal (i175) No. 3 (+) - No. 1 (-)	Is the voltage 4.5 - 5.0 V?	Go to step 4 .	Repair or replace the open, short circuit of the harness.
4 CHECK HARNESS. Disconnect the connector from A/C CM. Using a tester, check continuity between terminals. Connector & terminal (i175) No. 5 - (i80) No. 25: (i175) No. 3 - (i80) No. 16: (i175) No. 1 - (i181) No. 1: (i175) No. 7 - (i181) No. 16: (i175) No. 6 - (i181) No. 4	Is there continuity?	Go to step 5 .	Repair or replace the open circuit of harness.
5 CHECK AIR MIX DOOR ACTUATOR. Check the air mix door actuator parts. Refer to INSPECTION .	Is air mix door actuator normal?	Replace the A/C CM. Refer to REMOVAL .	Replace the air mix door actuator. Refer to REMOVAL .

DIAGNOSTIC PROCEDURE

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Scheme 57

Scheme 57: WIRING DIAGRAM

Step	Check	Yes	No
1 CHECK CONNECTOR. Check the condition of connector connection. Read the DTC using Subaru Select Monitor.	Is B1620 displayed?	Go to step 2 .	Repair the poor contact of connector.
2 CHECK ACTUATOR. Disconnect the mode door actuator. Short No. 2 and No. 3 of (i176) connector. Read the DTC using Subaru Select Monitor.	Is B1621 displayed?	Replace the mode door actuator. Refer to REMOVAL .	Go to step 3 .
3 CHECK HARNESS. Turn the ignition switch to ON. Using the tester, measure the voltage between terminals. Connector & terminal (i176) No. 1 (+) - No. 2 (-)	Is the voltage 4.5 - 5.0 V?	Go to step 4 .	Repair the open circuit of harness.
4 CHECK HARNESS. Using a tester, check continuity between terminals. Connector & terminal (i176) No. 1 - (i80) No. 16: (i176) No. 2 - (i181) No. 1: (i176) No. 3 - (i80) No. 26	Is there continuity?	Replace the A/C CM. Refer to REMOVAL .	Repair or replace the open circuit of harness.

DIAGNOSTIC PROCEDURE

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Step	Check	Yes	No
1 CHECK CONNECTOR. Check the condition of connector connection. Read the DTC using Subaru Select Monitor.	Is B1621 displayed?	Go to step 2 .	Repair the poor contact of connector.
2 CHECK ACTUATOR. Disconnect the mode door actuator. Read the DTC using Subaru Select Monitor.	Is B1620 displayed?	Replace the mode door actuator. Refer to REMOVAL .	Go to step 3 .
3 CHECK HARNESS. Using a tester, check continuity between terminals. Connector & terminal (i176) No. 2 - No. 3: (i176) No. 3 - Chassis ground	Is there continuity?	Repair or replace the short circuit of the harness.	Replace the A/C CM. Refer to REMOVAL .

DIAGNOSTIC PROCEDURE

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Step	Check	Yes	No
1 CHECK CONNECTOR. Check the condition of connector connection. Read the DTC using Subaru Select Monitor.	Is B1622 displayed?	Go to step 2 .	Repair the poor contact of connector.
2 CHECK CURRENT DATA. Using the Subaru Select Monitor, change the setting of "Mode Door Actuator Position Target" from the A/C diagnosis and perform the active test.	Did the actuator move to the specified target opening angle?	Mode door actuator circuit is normal.	Go to step 3 .
3 CHECK HARNESS. Turn the ignition switch to ON. Using the tester, measure the voltage between terminals. Connector & terminal (i176) No. 1 (+) - No. 2 (-)	Is the voltage 4.5 - 5.0 V?	Go to step 4 .	Repair or replace the open, short circuit of the harness.
4 CHECK HARNESS. Disconnect the connector from A/C CM. Using a tester, check continuity between terminals. Connector & terminal (i176) No. 3 - (i80) No. 26: (i176) No. 1 - (i80) No. 16: (i176) No. 2 - (i181) No. 1: (i176) No. 4 - (i181) No. 11: (i176) No. 5 - (i181) No. 13	Is there continuity?	Go to step 5 .	Repair or replace the open circuit of harness.
5 CHECK MODE DOOR ACTUATOR. Check the mode door actuator parts. Refer to INSPECTION .	Is the mode door actuator OK?	Replace the A/C CM. Refer to REMOVAL .	Replace the mode door actuator. Refer to REMOVAL .

DIAGNOSTIC PROCEDURE

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Scheme 58

Scheme 58: WIRING DIAGRAM

Step	Check	Yes	No
1 CHECK CONNECTOR. Check the condition of connector connection. Read the DTC using Subaru Select Monitor.	Is B1630 displayed?	Go to step 2 .	Repair the poor contact of connector.
2 CHECK ACTUATOR. Disconnect the rear vent door actuator. Short No. 1 and No. 5 of (i177) connector. Read the DTC using Subaru Select Monitor.	Is B1631 displayed?	Replace the rear vent door actuator. Refer to REMOVAL .	Go to step 3 .
3 CHECK HARNESS. Turn the ignition switch to ON. Using the tester, measure the voltage between terminals. Connector & terminal (i177) No. 3 (+) - No. 1 (-)	Is the voltage 4.5 - 5.0 V?	Go to step 4 .	Repair or replace the open circuit of harness.
4 CHECK HARNESS. Using a tester, check continuity between terminals. Connector & terminal (i177) No. 3 - (i80) No. 16: (i177) No. 1 - (i181) No. 1: (i177) No. 5 - (i80) No. 17	Is there continuity?	Replace the A/C CM. Refer to REMOVAL .	Repair or replace the open circuit of harness.

DIAGNOSTIC PROCEDURE

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Step	Check	Yes	No
1 CHECK CONNECTOR. Check the condition of connector connection. Read the DTC using Subaru Select Monitor.	Is B1631 displayed?	Go to step 2 .	Repair the poor contact of connector.
2 CHECK ACTUATOR. Disconnect the rear vent door actuator. Read the DTC using Subaru Select Monitor.	Is B1631 displayed?	Replace the rear vent door actuator. Refer to REMOVAL .	Go to step 3 .
3 CHECK HARNESS. Using a tester, check continuity between terminals. Connector & terminal (i177) No. 5 - (i177) No. 1: (i177) No. 5 - Chassis ground	Is there continuity?	Repair or replace the short circuit of the harness.	Replace the A/C CM. Refer to REMOVAL .

DIAGNOSTIC PROCEDURE

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Step	Check	Yes	No
1 CHECK CONNECTOR. Check the condition of connector connection. Read the DTC using Subaru Select Monitor.	Is B1632 displayed?	Go to step 2 .	Repair the poor contact of connector.
2 CHECK CURRENT DATA. Using the Subaru Select Monitor, change and perform "Rear Vent Actuator Position Target" of the active test from the A/C diagnosis.	Did the actuator move to the specified target opening angle?	Rear vent door actuator circuit is normal.	Go to step 3 .
3 CHECK HARNESS. Turn the ignition switch to ON. Using a tester, check the voltage between terminals. Connector & terminal (i177) No. 3 (+) - (i80) No. 1 (-)	Is the voltage 4.5 - 5.0 V?	Go to step 4 .	Repair or replace the open, short circuit of the harness.
4 CHECK HARNESS. Disconnect the connector from A/C CM. Using a tester, check continuity between terminals. Connector & terminal (i177) No. 5 - (i80) No. 17: (i177) No. 3 - (i80) No. 16: (i177) No. 1 - (i181) No. 1: (i177) No. 7 - (i181) No. 23: (i177) No. 6 - (i181) No. 24	Is there continuity?	Go to step 5 .	Repair or replace the open circuit of harness.
5 CHECK REAR VENT DOOR ACTUATOR. Check the rear vent door actuator parts. Refer to INSPECTION .	Is the rear vent door actuator normal?	Replace the A/C CM. Refer to REMOVAL .	Replace the rear vent door actuator. Refer to REMOVAL .

DIAGNOSTIC PROCEDURE

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Scheme 59

Scheme 59: WIRING DIAGRAM

Step	Check	Yes	No
1 CHECK FOR POOR CONTACT. Check the A/C CM connector (i80) for poor contact.	Is there poor contact of connector?	Repair the connector.	Go to step 2 .
2 CHECK DTC. Connect the disconnected connectors. Turn the ignition switch to ON. Read the DTC of the CAN system using the Subaru Select Monitor.	Is DTC displayed?	Perform the diagnosis according to the DTC. Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) .	Go to step 3 .
3 CHECK CAN COMMUNICATION CIRCUIT. Check the CAN communication circuit. Refer to CAN COMMUNICATION CIRCUIT CHECK .	Is the CAN communication circuit normal?	Go to step 4 .	Repair the CAN communication circuit. Refer to LAN SYSTEM .
4 CHECK INPUT SIGNAL FOR AMBIENT SENSOR. Turn the ignition switch to ON. Measure the voltage between terminals of ambient sensor connector (F138). Disconnect the connector. Connector & terminal (B480) No. 2 (+) - No. 1 (-)	Is the voltage approx. 5 V?	Go to step 5 .	Check the ambient sensor. Refer to INSPECTION .
5 CHECK COMBINATION METER OUTPUT SIGNAL. Turn the ignition switch to OFF. Pull out the combination meter. Disconnect the ambient sensor connector (F138). Turn the ignition switch to ON. Measure the voltage between terminals of combination meter connector (i10). Connector & terminal (i10) No. 36 (+) - No. 37 (-)	Is the voltage approx. 5 V?	Go to step 6 .	Check the combination meter. Refer to COMBINATION METER SYSTEM .
6 CHECK HARNESS CONNECTOR BETWEEN COMBINATION METER AND AMBIENT SENSOR. Turn the ignition switch to OFF. Disconnect the combination meter connector (i10). Measure the resistance of harness between combination meter connector (i10) and ambient sensor connector (B480). Connector & terminal (B480) No. 2 - (i10) No. 36: (B480) No. 1 - (i10) No. 37	Is the resistance less than 1 ohms?	Ambient sensor circuit is normal.	Repair the open circuit of the harness between the combination meter and ambient sensor.

DIAGNOSTIC PROCEDURE

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Scheme 60

Scheme 60: WIRING DIAGRAM

Step	Check	Yes	No
1 CHECK CONNECTOR. Check the connecting condition of connector. Read the DTC using Subaru Select Monitor.	Is B1641 displayed?	Go to step 2 .	Repair the poor connection of the connector.
2 CHECK FLOW SENSOR. Disconnect the refrigerant flow sensor connector. Read the DTC using Subaru Select Monitor.	Is B1642 displayed?	Replace the compressor. Refer to REMOVAL .	Go to step 3 .
3 CHECK HARNESS. Disconnect the A/C CM connector. Using a tester, check continuity between terminals. Connector & terminal (B507) No. 2 - (B507) No. 3: (B507) No. 3 - Chassis ground	Is there continuity?	Repair or replace the short circuit of the harness.	Replace the A/C CM. Refer to REMOVAL .

DIAGNOSTIC PROCEDURE

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Step	Check	Yes	No
1 CHECK CONNECTOR. Check the connecting condition of connector. Read the DTC using Subaru Select Monitor.	Is B1642 displayed?	Go to step 2 .	Repair the poor connection of the connector.
2 CHECK FLOW SENSOR. Disconnect the flow sensor connector. Short No. 2 and No. 3 of the flow sensor connector (B507). Read the DTC using Subaru Select Monitor.	Is B1641 displayed?	Replace the compressor. Refer to REMOVAL .	Go to step 3 .
3 CHECK HARNESS. Turn the ignition switch to ON. Using the tester, measure the voltage between terminals. Connector & terminal (B507) No. 1 (+) - No. 2 (-)	Is the voltage 4.5 - 5.0 V?	Go to step 4 .	Repair or replace the open circuit of harness.
4 CHECK HARNESS. Disconnect the A/C CM connector. Using a tester, check continuity between terminals. Connector & terminal (B507) No. 3 - (i80) No. 13: (B507) No. 2 - (i181) No. 1: (B507) No. 1 - (i80) No. 16	Is there continuity?	Replace the A/C CM. Refer to REMOVAL .	Repair or replace the open circuit of harness.

DIAGNOSTIC PROCEDURE

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Step	Check	Yes	No
1 CHECK CONNECTOR. Check the connecting condition of connectors (B506), (B36), (i181) and (B479).	Is there poor contact?	Repair the poor contact of connector.	Go to step 2 .
2 ACTIVE TEST. Attach the manifold gauge. Using the Subaru Select Monitor, change the setting of "Variable Flow Change Sol Duty Setting" from the A/C diagnosis and perform the active test.	Did the actuator operate to the specified target, and the pressure change?	Variable flow change solenoid circuit is normal.	Go to step 3 .
3 CHECK VARIABLE FLOW CHANGE SOLENOID. Disconnect the variable flow change solenoid connector. Using a tester, measure the resistance between terminals of the solenoid. Connector & terminal (B506) No. 1 - No. 2	Is the resistance 10 - 12 ohms?	Go to step 4 .	Replace the compressor. Refer to REMOVAL .
4 CHECK HARNESS. Disconnect the A/C CM connector. Using a tester, check for continuity between the harness terminals. Connector & terminal (B506) No. 2 - (i181) No. 2: (B506) No. 1 - Chassis ground	Is there continuity?	Go to step 5 .	Repair or replace the open circuit of harness.
5 CHECK HARNESS. Using a tester, check for continuity between the harness terminals. Connector & terminal (B506) No. 2 - Chassis ground: (B506) No. 1 - (B506) No. 2	Is there continuity?	Repair or replace the short circuit of the harness.	Replace the A/C CM. Refer to REMOVAL .

DIAGNOSTIC PROCEDURE

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Scheme 61

Scheme 61: WIRING DIAGRAM

Step	Check	Yes	No
1 CHECK AMOUNT OF REFRIGERANT. Check the refrigerant pressure and filling amount. Refer to PROCEDURE .	Is the filling amount a standard value?	Check the refrigerant pressure sensor or refrigerant flow sensor for defect.	Replace the compressor. Refer to REMOVAL .

DIAGNOSTIC PROCEDURE

Auto A/C

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Scheme 62

Manual A/C

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Scheme 63

Step	Check	Yes	No
1 CHECK CONNECTOR. Check the power supply circuit connectors for poor contact.	Is there poor contact?	Repair the connector.	Go to step 2 .
2 CHECK FUSE. Turn the ignition switch to OFF. Remove the fuse No. 4 and No. 31 from the main fuse box or fuse & relay box. Check the condition of fuse.	Is the fuse blown out?	Replace the fuse.	Go to step 3 .
3 CHECK A/C CONTROL PANEL POWER CIRCUIT. Remove the A/C control panel. Disconnect the A/C control panel connector. Measure the voltage between A/C control panel connector terminal and chassis ground after turning the ignition switch to ON. Connector & terminal Auto A/C (i88) No. 5 (+) - Chassis ground (-): (i88) No. 6 (+) - Chassis ground (-): Manual A/C (i88) No. 1 (+) - Chassis ground (-): (i88) No. 7 (+) - Chassis ground (-)	Is the voltage 10 V or more?	Go to step 4 .	Check for open or short circuit in the harness between A/C control panel and fuse.
4 CHECK A/C CONTROL PANEL GROUND CIRCUIT. Measure the resistance of harness between A/C control panel and chassis ground after turning the ignition switch to OFF. Connector & terminal Auto A/C (i88) No. 12 - Chassis ground: Manual A/C (i88) No. 11 - Chassis ground	Is the resistance less than 10 ohms?	Go to step 5 .	Repair the harness for ground line.
5 CHECK COMMUNICATION CIRCUIT HARNESS. Disconnect the connector from A/C control panel and A/C CM. Using a tester, check for continuity between the harness terminals. Connector & terminal Auto A/C (i80) No. 18 - (i88) No. 10: (i80) No. 7 - (i88) No. 4: Manual A/C (i80) No. 18 - (i88) No. 6: (i80) No. 7 - (i88) No. 12	Is there continuity?	Go to step 6 .	Repair or replace the open circuit of harness.
6 CHECK HARNESS. Using a tester, check continuity between terminals. Connector & terminal (i80) No. 18 - No. 7: (i80) No. 18 - Chassis ground: (i80) No. 7 - Chassis ground	Is there continuity?	Repair or replace the short circuit of the harness.	Replace the A/C control panel. Refer to REMOVAL .

DIAGNOSTIC PROCEDURE

HVAC System (Auto AC) (Diagnostics): Wiring Subaru Outback BR рестайлинг

WIRING DIAGRAM

Scheme 41

Scheme 42

Scheme 43

Scheme 44

Scheme 45

Scheme 46

Scheme 47

Scheme 48

Scheme 49

Scheme 50

Scheme 51

Scheme 52

Scheme 53

Scheme 54

Scheme 55

Scheme 56

Scheme 57

Scheme 58

Scheme 59

Scheme 60

Scheme 61

Scheme 62

Scheme 63

More articles — HVAC System (Auto AC) (Diagnostics)

Login / Signup

Enter the code

You have successfully logged in!