HVAC SYSTEM (HEATER, VENTILATOR AND A/C) > General Description
PREPARATION TOOL
1. SPECIAL TOOL
ILLUSTRATION | TOOL NUMBER | DESCRIPTION | REMARKS |

—
SUBARU SELECT MONITOR 4
Used for setting of each function and troubleshooting for electrical system.
NOTE:
For detailed operation procedures of Subaru Select Monitor 4, refer to “Application help”.
2. GENERAL TOOL
CAUTION:
When working on vehicles with a HFC-134a system, only use HFC-134a specified tools and parts. Do not mix CFC-12 tools and parts. If HFC-134a and CFC-12 compressor oil is mixed, it will result in poor lubrication and the compressor itself may be damaged.
In order to prevent the mixture of HFC-134a and CFC-12 parts and liquid, the type of tool and screw, and the replacement valves used are different. The gas leak detectors for the HFC-134a and CFC-12 systems must also not be interchanged.
HFC-134a | CFC-12 | |
Tool and screw type | Millimeter size | Inch size |
Valve type | Quick joint type | Screw-in type |
TOOL NAME/ILLUSTRATION | REMARKS |
Circuit tester | Used for measuring resistance, voltage and current. |
DST-i | Used together with Subaru Select Monitor 4. |
Wrench | Various WRENCHES will be required to service any A/C system.7 — 40 N·m (0.7 to 4.1 kgf-m, 5 to 30 ft-lb) torque wrench and various crowfoot wrenches will be needed. Open end or flare nut wrenches will be needed to affix the pipe and hose fittings. |

Applicator bottle
A small APPLICATOR BOTTLE is recommended to apply compressor oil to the various parts. It can be available at a hardware store.

Manifold gauge set
A MANIFOLD GAUGE SET (with hoses) is available at either a refrigerant supplier or an automotive equipment supplier.

Refrigerant recovery system
A REFRIGERANT RECOVERY SYSTEM is used for the recovery and recycling of A/C system refrigerant after contaminants and moisture have been removed from the refrigerant.

Syringe
A graduated plastic SYRINGE will be needed to add oil into the system again. A syringe can be available at a pharmacy or drug store.

Vacuum pump
A VACUUM PUMP is necessary (for a good working condition), and may be available at either a refrigerant supplier or an automotive equipment supplier.

Can tap
A CAN TAP for the 397 g (14 oz) can is available at an automotive equipment supplier.

Thermometer/hygrometer
A Pocket THERMOMETER/HYGROMETER is available at either a industrial hardware store or a refrigerant supplier.

Electronic leak detector
An ELECTRONIC LEAK DETECTOR can be available at either a specialty tool supplier or an A/C equipment supplier.

Weight scale
A WEIGHT SCALE such as an electronic charging scale or a bathroom scale with digital display will be needed, if a 13.6 kg (30 lb) refrigerant container is used.

LocationNote
INSTRUMENTATION/DRIVER INFO > Multi-function Display (MFD) SystemNOTEFor procedure of each component in the Multi-Function Display (MFD) system, refer to the respective section.• Multi-function display: Multi-function Display (MFD) > REMOVAL">• Multi-function display switc ...
Inspection
HVAC SYSTEM (HEATER, VENTILATOR AND A/C) > CompressorINSPECTION1. MAGNET CLUTCH CLEARANCE INSPECTION1. Check the clearance of entire circumference around the drive plate and pulley.Specification:0.3 — 0.6 mm (0.0118 — 0.0236 in)2. Replace the compressor assembly if the inspection result is no ...
Dtc u0140 lost communication with body control module
Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)DTC U0140 LOST COMMUNICATION WITH BODY CONTROL MODULEDetected when CAN data from BIU does not arrive.NOTE:Perform the diagnosis for LAN system. Basic Diagnostic Procedure > PRO ...