WIRING DIAGRAM
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK CURRENT DATA. Using the Subaru Select Monitor, check "In-vehicle Sensor Temperature" of the current data from the A/C diagnosis. | Does the current data display 25°C (77°F)? | 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 i173 connector. Using the Subaru Select Monitor, check "In-vehicle Sensor Temperature" of the current data from the A/C diagnosis. | Does the current data display 25°C (77°F)? | Go to step 3 . | Replace the in-vehicle sensor. Ref. to REMOVAL , In-Vehicle Sensor (Auto A/C Model). |
| 3 CHECK HARNESS. Turn the ignition switch to ON. Using the tester, measure the voltage between terminals. Connector & terminal (i173) 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 (i173) No. 1 - (i81) No. 1: (i173) No. 2 - (i80) No. 11 | Is there continuity? | Replace the A/C CM. Ref. to REMOVAL , Control Unit. | Repair or replace the open circuit of harness. |
DIAGNOSTIC PROCEDURE
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK CURRENT DATA. Using the Subaru Select Monitor, check "Evaporator Temperature" of the current data from the A/C diagnosis. | Is the current data lower than -30°C (-54°F)? | Go to step 2 . | Check the connection of the evaporator sensor circuit. |
| 2 CHECK EVAPORATOR SENSOR. Disconnect the evaporator sensor. Short the i172 connector. Using the Subaru Select Monitor, check "Evaporator Temperature" of the current data from the A/C diagnosis. | Is the current data lower than -30°C (-54°F)? | Go to step 3 . | Replace the evaporator sensor. Ref. to REMOVAL , Evaporator. |
| 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 - (i80) No. 21: (i172) No. 2 - (i81) No. 1 | Is there continuity? | Replace the A/C CM. Ref. to REMOVAL , Control Unit. | Repair or replace the open circuit of harness. |
DIAGNOSTIC PROCEDURE
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK CURRENT DATA. Using the Subaru Select Monitor, check "Refrigerant Pressure" of the current data from the A/C diagnosis. | Does the current data display 0 MPa? | Go to step 2 . | Check the connection of the refrigerant pressure sensor. |
| 2 CHECK REFRIGERANT PRESSURE SENSOR. Disconnect the refrigerant pressure sensor. Using the Subaru Select Monitor, check "Refrigerant Pressure" of the current data from the A/C diagnosis. | Does the current data display 0 MPa? | Go to step 3 . | Replace the refrigerant pressure sensor. Ref. to REMOVAL , Evaporator. |
| 3 CHECK HARNESS. Turn the ignition switch to ON. Using the tester, measure the voltage between terminals. Connector & terminal (B505) 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 (B505) No. 1 - No. 2: (B505) No. 2 - No. 3: (B505) No. 3 - No. 1 | Is there continuity? | Repair or replace the short circuit of the harness. | Replace the A/C CM. Ref. to REMOVAL , Control Unit. |
DIAGNOSTIC PROCEDURE
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK CURRENT DATA. Using the Subaru Select Monitor, check "Quantity of Sunload" of the current data from the A/C diagnosis. | Does the current data display 0 W/m 2 ? | Go to step 2 . | Check the connection of the sunload sensor circuit. |
| 2 CHECK SUNLOAD SENSOR. Disconnect the sunload sensor. Short the i51 connector. Using the Subaru Select Monitor, check "Quantity of Sunload" of the current data from the A/C diagnosis. | Does the current data display 0 W/m 2 ? | Go to step 3 . | Replace the sunload sensor. Ref. to REMOVAL , Evaporator. |
| 3 CHECK HARNESS. Turn the ignition switch to ON. Using the tester, measure the voltage between terminals. Connector & terminal (i51) No. 1 - No. 2 | Is the voltage 4.5 - 5.0 V? | 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 (i51) No. 1 - (i80) No. 16: (i51) No. 2 - (i81) No. 23 | Is there continuity? | Replace the A/C CM. Ref. to REMOVAL , Control Unit. | Repair or replace the open circuit of harness. |
DIAGNOSTIC PROCEDURE
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK CONNECTOR. Check the condition of connector connection. Read the DTC of the A/C CM using the 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 of the A/C CM using the Subaru Select Monitor. | Is B1610 displayed? | Replace the air mix door actuator (driver's). | 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. 1 - (i174) No. 3: (i174) No. 3 - (i174) No. 5: (i174) No. 5 - (i174) No. 1 | Is there continuity? | Repair or replace the short circuit of the harness. | Go to step 4 . |
| 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 - (i181) No. 1: (i174) No. 5 - (i80) No. 14 | Is there continuity? | Replace the A/C CM. Ref. to REMOVAL , Control Unit. | Repair or replace the short circuit of the harness. |
DIAGNOSTIC PROCEDURE
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK CONNECTOR. Check the condition of connector connection. Read the DTC of the A/C CM using the 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 AIR MIX DOOR ACTUATOR - POTENTIOMETER. Using the temperature control button, change the set temperature. Using the Subaru Select Monitor, check "Airmix Door Actuator Position (Driver's)" of the current data from the A/C diagnosis. | Does the current data change? | Go to step 4 . | Replace the air mix door actuator (driver's). Ref. to REMOVAL , Heater and Cooling Unit. |
| 4 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? | Check the connection of the air mix door actuator position circuit. | Go to step 5 . |
| 5 CHECK HARNESS. Disconnect the connector from A/C CM. Using a tester, check continuity between terminals. Connector & terminal (i174) No. 5 - (i80) No. 14 | Is there continuity? | Replace the A/C CM. Ref. to REMOVAL , Control Unit. | Repair or replace the open circuit of harness. |
DIAGNOSTIC PROCEDURE
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK CONNECTOR. Check the condition of connector connection. Read the DTC of the A/C CM using the 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. Read the DTC of the A/C CM using the Subaru Select Monitor. | Is B1614 displayed? | Go to step 3 . | Replace the air mix door actuator position (passenger's). |
| 3 CHECK HARNESS. Disconnect the connector from A/C CM. Using a tester, check continuity between terminals. Connector & terminal (i175) No. 1 - (i175) No. 3: (i175) No. 3 - (i175) No. 5: (i175) No. 5 - (i175) No. 1 | Is there continuity? | Repair or replace the short circuit of the harness. | Go to step 4 . |
| 4 CHECK HARNESS. Using a tester, check continuity 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. Ref. to REMOVAL , Control Unit. | Repair or replace the short circuit of the harness. |
DIAGNOSTIC PROCEDURE
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK CONNECTOR. Check the condition of connector connection. Read the DTC of the A/C CM using the 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 AIR MIX DOOR ACTUATOR - POTENTIOMETER. Using the temperature control button, change the set temperature. Using the Subaru Select Monitor, check "Airmix Door Actuator Position (Passenger's)" of the current data from the A/C diagnosis. | Does the current data change? | Go to step 4 . | Replace the air mix door actuator (passenger's). Ref. to REMOVAL , Heater and Cooling Unit. |
| 4 CHECK HARNESS. Turn the ignition switch to ON. Using the tester, measure the voltage between terminals. Connector & terminal (i175) No. 1 - No. 3 | Is the voltage 4.5 - 5.0 V? | Check the connection of the air mix door actuator position circuit. | Go to step 5 . |
| 5 CHECK HARNESS. Disconnect the connector from A/C CM. Using a tester, check continuity between terminals. Connector & terminal (i175) No. 5 - (i181) No. 25 | Is there continuity? | Replace the A/C CM. Ref. to REMOVAL , Control Unit. | Repair or replace the open circuit of harness. |
DIAGNOSTIC PROCEDURE
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK CONNECTOR. Check the condition of connector connection. Read the DTC of the A/C CM using the 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 of the A/C CM using the Subaru Select Monitor. | Is B1620 displayed? | Go to step 3 . | Replace the mode door actuator. Ref. to REMOVAL , Heater and Cooling Unit. |
| 3 CHECK HARNESS. Disconnect the connector from A/C CM. Using a tester, check continuity between terminals. Connector & terminal (i176) No. 1 - (i176) No. 2: (i176) No. 2 - (i176) No. 3: (i176) No. 3 - (i176) No. 1 | Is there continuity? | Repair or replace the short circuit of the harness. | Go to step 4 . |
| 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. Ref. to REMOVAL , Control Unit. | Repair or replace the open circuit of harness. |
DIAGNOSTIC PROCEDURE
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK CONNECTOR. Check the condition of connector connection. Read the DTC of the A/C CM using the 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 MODE DOOR ACTUATOR - POTENTIOMETER. Using the temperature control button, change the set temperature. Using the Subaru Select Monitor, check "Mode Door Actuator Position" of the current data from the A/C diagnosis. | Does the current data change? | Go to step 4 . | Replace the mode door actuator (passenger's). Ref. to REMOVAL , Heater and Cooling Unit. |
| 4 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? | Check the connection of the mode door actuator position circuit. | Go to step 5 . |
| 5 CHECK HARNESS. Disconnect the connector from A/C CM. Using a tester, check continuity between terminals. Connector & terminal (i176) No. 3 - (i80) No. 26 | Is there continuity? | Replace the A/C CM. Ref. to REMOVAL , Control unit. | Repair or replace the open circuit of harness. |
DIAGNOSTIC PROCEDURE
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK CURRENT DATA. Using the Subaru Select Monitor, check "Refrigerant Flow". | Is the value 3.2 MPa or more? | Go to step 2 . | Refrigerate flow sensor circuit is normal. |
| 2 CHECK SENSOR POWER SUPPLY. Disconnect the refrigerant flow sensor connector. 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 6 . | Go to step 3 . |
| 3 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? | Go to step 4 . | Repair or replace the open circuit of harness. |
| 4 CHECK HARNESS. Using a tester, check continuity between terminals. Connector & terminal (B507) No. 1 - Chassis ground: (B507) No. 2 - Chassis ground: (B507) No. 3 - Chassis ground | Is there continuity? | Repair or replace the short circuit of the harness. | Go to step 5 . |
| 5 CHECK HARNESS. Using a tester, check continuity between terminals. Connector & terminal (B507) No. 1 - No. 2: (B507) No. 1 - No. 3: (B507) No. 2 - No. 3 | Is there continuity? | Repair or replace the short circuit of the harness. | Go to step 6 . |
| 6 CHECK A/C CM. Replace the A/C CM with a normal part. Read the DTC using Subaru Select Monitor. | Is B1641 detected? | Replace refrigerant flow sensor. | Replace the A/C CM. Ref. to REMOVAL , Control Unit. |
DIAGNOSTIC PROCEDURE
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK AMOUNT OF REFRIGERANT. Check the refrigerant pressure and filling amount. Ref. to PROCEDURE , Refrigerant Pressure with Manifold Gauge Set. | Is the filling amount a standard value? | Check the refrigerant pressure sensor or refrigerant flow sensor for defect. | Replace the compressor. |
DIAGNOSTIC PROCEDURE