WIRING DIAGRAM
< Refer to Air Conditioning System in the wiring diagram. >
Scheme 40
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK FUSE. Turn the ignition switch to OFF. Remove a fuse from fuse & relay box. Check the condition of fuse. | Is the fuse blown out? | Replace the fuse. | Go to step 2 . |
| 2 CHECK CONNECTOR. Check for poor contact of connector. | 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 (i88) No. 15 (+) - Chassis ground (-): (i88) No. 31 (+) - Chassis ground (-): (i88) No. 32 (+) - 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 (i88) No. 34 - Chassis ground | Is the resistance less than 10 ohms? | Go to step 5 . | Repair the harness for ground line. |
| 5 CHECK FOR POOR CONTACT. Check poor contact of A/C control panel connector. | Is there poor contact of connector? | Repair the connector. | Replace the A/C control panel. < Refer to REMOVAL , Control Panel. > |
Air Conditioning System < Refer to Air Conditioning System in the wiring diagram. >
Scheme 41
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK A/C CONTROL PANEL. 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) Blower Fan Level Turn the temperature control dial at MAX COOL and increase and decrease the A/C control panel fan dial. (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)" indicate "0%"? Also, does the value of "Blower Fan Level" increase or decrease in conjunction with the fan dial operation? | Go to step 2 . | Go to step 5 . |
| 2 CHECK AIRFLOW CAPACITY. Turn the temperature control dial to LO (both dials for the models equipped with left/right independent air conditioning function), A/C control panel fan dial to MAX and 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. | 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. | Is each duct normal? | Go to step 5 . | Repair the faulty duct. |
| 5 CHECK A/C CONTROL PANEL. Turn the ignition switch to ON. Turn the fan dial to the 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 "7"? | Go to step 6 . | Replace the A/C control panel. < Refer to REMOVAL , Control Panel. > |
| 6 CHECK A/C CONTROL PANEL. Turn the fan dial to the 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 , Control Panel. > |
| 7 CHECK CONNECTOR. Check for poor contact of connector. | Is there poor contact of connector? | Repair the connector. | Go to step 8 . |
| 8 CHECK FUSE. Remove a fuse in the fuse & relay 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 dial OFF. 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 (i88) No. 9 (+) - Chassis ground (-) | Is the voltage 10 V or more? | Go to step 10 . | Check for open or short circuit in the harness between fuse and ECM. Check the blower relay connector and relay unit. < Refer to CHECK RELAY , INSPECTION, Relay and Fuse. > |
| 10 CHECK BLOWER MOTOR RELAY ON SIGNAL. Start the engine. Turn the fan dial to ON. Using a tester, measure the voltage between the A/C control panel connector (i88) and chassis ground. Connector & terminal (i88) No. 9 (+) - Chassis ground (-) | Is the voltage 0 V? | Go to step 11 . | Replace the A/C control panel. < Refer to REMOVAL , Control Panel. > |
| 11 CHECK BLOWER MOTOR POWER SUPPLY CIRCUIT. Turn the ignition switch to ON. Turn the fan dial to ON. Use a tester to measure the voltage between the blower motor connector (B87) and chassis ground. Connector & terminal (B87) No. 2 (+) - Chassis ground (-) | Is the voltage 10 V or more? | Go to step 12 . | Check the blower motor power supply line harness for open circuit or connector disconnection. Check the blower relay connector and relay unit. < Refer to CHECK RELAY , INSPECTION, Relay and Fuse. > |
| 12 CHECK BLOWER MOTOR UNIT. Check the blower motor. < Refer to INSPECTION , Blower Motor. > | Is the blower motor OK? | Go to step 13 . | Replace the blower motor. < Refer to REMOVAL , Blower Motor. > |
| 13 CHECK HARNESS. Disconnect the power transistor and A/C control panel connector. Using a tester, measure the resistance between harness terminals. Connector & terminal (B386) No. 4 - (B57) No. 4: (B87) No. 1 - (B57) No. 3: (B57) No. 2 - (i88) No. 40: (B57) No. 1 - 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 harness resistance between the power transistor connector and chassis ground. Connector & terminal (B57) No. 2 - 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 , Power Transistor (Auto A/C Model). > | Replace the A/C control panel. < Refer to REMOVAL , Control Panel. > |
Air Conditioning System < Refer to Air Conditioning System in the wiring diagram. >
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK A/C CONTROL PANEL. Turn the ignition switch to ON. Turn the fan dial to the 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 "7"? | Go to step 2 . | Replace the A/C control panel. < Refer to REMOVAL , Control Panel. > |
| 2 CHECK A/C CONTROL PANEL. Turn the fan dial to the 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 , Control Panel. > |
| 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 (B57) No. 4 - Chassis ground | Is the resistance less than 1 ohms? | Repair or replace the short circuit of the harness between blower motor and power transistor. | Go to step 4 . |
| 4 CHECK HARNESS. Remove the A/C control panel. Turn the ignition switch to ON. Use a tester to measure the resistance between the power transistor connector and chassis ground. Connector & terminal (B57) No. 2 - Chassis ground | Is the resistance less than 1 ohms? | Repair or replace the short circuit of the harness between A/C control panel 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 (B57) No. 2 (+) - Chassis ground (-) | Is the voltage approx. 9 V when fan dial in 1st, and approx. 3.5 V when fan dial in 6th? | Replace the power transistor. < Refer to REMOVAL , Power Transistor (Auto A/C Model). > | Go to step 6 . |
| 6 CHECK A/C CONTROL PANEL. Turn the fan dial OFF. Disconnect the power transistor connector. Use a tester to measure the resistance between the power transistor connector and chassis ground. Connector & terminal (B57) No. 2 - Chassis ground | When the fan dial is OFF and other than OFF, does the resistance change? | Replace the power transistor. < Refer to REMOVAL , Power Transistor (Auto A/C Model). > | Replace the A/C control panel. < Refer to REMOVAL , Control Panel. > |
Air Conditioning System < Refer to Air Conditioning System in the wiring diagram. >
Scheme 42
| 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. Turn the fan dial to the maximum position. Press the A/C switch. | Is "A/C" displayed on the A/C control panel? | Go to step 2 . | Replace the A/C control panel. < Refer to REMOVAL , Control Panel. > |
| 2 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 4 . | Go to step 3 . |
| 3 CHECK EVAPORATOR SENSOR. Check the evaporator sensor. < Refer to INSPECTION , Evaporator Sensor. > | Is the sensor normal? | Go to step 4 . | Replace the evaporator sensor. < Refer to REMOVAL , Evaporator Sensor. > |
| 4 CHECK PRESSURE SWITCH. Check the pressure switch connection. | Is the connector normal? | Go to step 5 . | Repair the connector. |
| 5 CHECK PRESSURE SWITCH. Using the Subaru Select Monitor, check "Pressure Switch" of the current data from Air Conditioning Diagnosis. | Does the data indicate normal? | Go to step 10 . | Go to step 6 . |
| 6 CHECK AMOUNT OF REFRIGERANT PRESSURE. Check the refrigerant pressure. < Refer to REFRIGERANT GAS PRESSURE INSPECTION , PROCEDURE, Refrigerant Pressure with Manifold Gauge Set. > | Is the refrigerant pressure normal? | Go to step 7 . | Perform repair according to refrigerant pressure inspection. |
| 7 CHECK CONNECTOR. Check poor contact of A/C control panel connector. | Is the connector normal? | Go to step 8 . | Repair the connector. |
| 8 CHECK FUSE. Turn the ignition switch to ON. Remove a fuse in the fuse & relay box. Check the fuse. | Is the fuse normal? | Go to step 9 . | Replace the fuse. |
| 9 CHECK PRESSURE SWITCH SIGNAL. Turn the ignition switch to OFF. Disconnect the A/C control panel connector. Turn the ignition switch to ON. Measure the voltage between A/C control panel connector terminal and chassis ground. Connector & terminal (i88) No. 11 (+) - Chassis ground (-) | Is the voltage 10 V or more? | Replace the A/C control panel. < Refer to REMOVAL , Control Panel. > | Check for open or short circuit in the harness between fuse and A/C control panel. Check for poor contact of pressure switch connector. |
| 10 CHECK CAN COMMUNICATION CIRCUIT. Using the Subaru Select Monitor, check "A/C Switch Signal" of the current data from Engine Diagnosis. | Does the data indicate ON? | Go to step 12 . | Go to step 11 . |
| 11 CHECK CAN COMMUNICATION CIRCUIT. Perform the diagnosis for LAN system. < Refer to PROCEDURE , Basic Diagnostic Procedure. > | Is the system normal? | Repair it according to DTC of LAN system. | Replace the A/C control panel. < Refer to REMOVAL , Control Panel. > |
| 12 CHECK A/C RELAY ON SIGNAL. Disconnect the ECM connector. Turn the ignition switch to ON. Measure the voltage between ECM connector terminal and chassis ground. Connector & terminal (B135) No. 35 (+) - Chassis ground (-) | Is the voltage 10 V or more? | Go to step 13 . | Check for open or short in the harness between pressure switch and ECM. Check poor contact of A/C relay connector. Check the A/C relay. < Refer to INSPECTION , Relay and Fuse. > |
| 13 CHECK A/C RELAY ON SIGNAL. Start the engine. Turn the A/C switch to ON. Turn the temperature control dial at maximum cool position. Measure the voltage between ECM connector terminal and chassis ground. Connector & terminal (B135) No. 35 (+) - Chassis ground (-) | Is the voltage 0 V? | Go to step 14 . | Replace the ECM. |
| 14 CHECK MAGNET CLUTCH POWER SUPPLY CIRCUIT. Stop the engine. Disconnect the magnet clutch connector. Start the engine. Turn the A/C switch to ON. Turn the temperature control dial at maximum cool position. Measure the voltage between magnet clutch connector terminal and chassis ground. Connector & terminal (F24) No. 1 (+) - Chassis ground (-) | Is the voltage 10 V or more? | Check the magnet clutch. | Check for open or short circuit in the harness between fuse and magnet clutch. Check poor contact of A/C relay connector. Check the A/C relay. < Refer to INSPECTION , Relay and Fuse. > |
Refer to Clearance Light and Illumination Light System in the wiring diagram< Refer to System Wiring Diagram Article. >
Scheme 43
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK ILLUMINATION. Make sure that all illuminations except A/C come on. | Do other illuminations come on. | Go to step 2 . | < Refer to INSPECTION , Clearance Light and Illumination Light System. > |
| 2 CHECK CONNECTOR. Check for poor contact of connector. | Is there poor contact? | Repair the connector. | Go to step 3 . |
| 3 CHECK HARNESS. Turn the lighting switch to ON. Using a tester, measure the voltage between the A/C control panel connector and chassis ground. Connector & terminal (i88) No. 37 (+) - Chassis ground (-) | Is the voltage 10 V or more? | Go to step 4 . | Repair or replace the open circuit of harness. |
| 4 CHECK HARNESS. Turn the lighting switch to OFF. Measure the resistance between A/C control panel connector and body integrated unit connector. Connector & terminal (i88) No. 35 - (i84) No. 16 | Is the resistance less than 10 ohms? | Go to step 5 . | Repair or replace the open circuit of harness. |
| 5 CHECK A/C CONTROL PANEL UNIT. Check the A/C control panel. < Refer to REMOVAL , Control Panel. > | Is A/C control panel OK? | A/C control panel illumination circuit is normal. | Replace the A/C control panel. < Refer to REMOVAL , Control Panel. > |
Refer to Air Conditioning System in the wiring diagram< Refer to System Wiring Diagram. >
Scheme 44
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK POWER SUPPLY CIRCUIT. Connect SDI (Subaru Diagnosis Interface) to the data link connector. | Is SDI powered on? | Go to step 4 . | Go to step 2 . |
| 2 CHECK POWER SUPPLY CIRCUIT. Measure the voltage between data link connector and chassis ground. Connector & terminal (B40) No. 16 (+) - Chassis ground (-) | Is the voltage 10 V or more? | Go to step 3 . | Repair the power supply circuit. NOTE: In this case, repair the following item Open or ground short circuit of harness between battery and data link connector Blown out of fuse (M/B No. 12) |
| 3 CHECK HARNESS BETWEEN DATA LINK CONNECTOR AND CHASSIS GROUND. Turn the ignition switch to OFF. Measure the resistance of harness between data link connector and chassis ground. Connector & terminal (B40) No. 4 - Chassis ground: (B40) No. 5 - Chassis ground | Is the resistance less than 5 ohms? | Repair the poor contact of data link connector. | Repair the harness and connector. |
| 4 CHECK SUBARU SELECT MONITOR. Connect the Subaru Select Monitor to a normal vehicle. Start the engine and perform communication between the Subaru Select Monitor and vehicle. | Is communication possible? | Go to step 5 . | Use another Subaru Select Monitor because the CAN communication circuit of the Subaru Select Monitor is faulty. |
| 5 CHECK LAN SYSTEM. Check the LAN system. < Refer to PROCEDURE , Basic Diagnostic Procedure. > | Is LAN system normal? | Go to step 6 . | Repair it according to the diagnosis for LAN system. |
| 6 CHECK CONNECTOR. Check for poor contact of power supply circuit connector. | Is there poor contact of connector? | Repair the connector. | Go to step 7 . |
| 7 CHECK FUSE. Turn the ignition switch to OFF. Remove a fuse from the fuse box. Check the fuse. | Is the fuse blown out? | Replace the fuse. | Go to step 8 . |
| 8 CHECK A/C CONTROL PANEL POWER CIRCUIT. 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 (i88) No. 15 (+) - Chassis ground (-): (i88) No. 31 (+) - Chassis ground (-): (i88) No. 32 (+) - Chassis ground (-) | Is the voltage 10 V or more? | Go to step 9 . | Check for open or short circuit in the harness between A/C control panel and fuse. |
| 9 CHECK A/C CONTROL PANEL GROUND CIRCUIT. Measure the resistance of harness between A/C control panel and chassis ground. Connector & terminal (i88) No. 34 - Chassis ground | Is the resistance less than 5 ohms? | Check the connection between the data link connector and Subaru Select Monitor. | Repair the harness for ground line. |
| NOTE |
|---|
| In this case, repair the following item |
Refer to Air Conditioning System in the wiring diagram < Refer to System Wiring Diagram Article. >
Scheme 45
Refer to Air Conditioning System in the wiring diagram < Refer to System Wiring Diagram Article. >
Refer to Air Conditioning System in the wiring diagram < Refer to System Wiring Diagram Article.>
Scheme 46
Refer to Air Conditioning System in the wiring diagram < Refer to System Wiring Diagram Article.>
Refer Air Conditioning System in the wiring diagram < Refer to System Wiring Diagram Article. >
Scheme 47
Refer to Air Conditioning System in the wiring diagram< Refer to System Wiring Diagram Article>
Refer to Air Conditioning System in the wiring diagram < Refer to System Wiring Diagram Article>
Scheme 48
Refer to Air Conditioning System in the wiring diagram. < Refer to System Wiring Diagram Article. >
Refer to Air Conditioning System in the wiring diagram < Refer to System Wiring Diagram Article. >
Scheme 49
Refer Air Conditioning System in the wiring diagram < Refer to System Wiring Diagram Article.>
Refer to Air Conditioning System in the wiring diagram < Refer to System Wiring Diagram Article.>
Scheme 50
Refer to Air Conditioning System in the wiring diagram< Refer to System Wiring Diagram Article.>
Refer to Air Conditioning System in the wiring diagram< Refer to System Wiring Diagram Article.>
Scheme 51
Refer to Air Conditioning System in the wiring diagram. < Refer to System Wiring Diagram Article. >
Refer to Air Conditioning System in the wiring diagram. < Refer to System Wiring Diagram Article. >
Scheme 52
Refer to Air Conditioning System in the wiring diagram < Refer to System Wiring Diagram Article. >
Refer to Air Conditioning System in the wiring diagram. < Refer to System Wiring Diagram Article. >