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Subaru Ai r Condi t i o ni n g Systems
O
ver the years, Subaru air conditioning systems have taken many different
shapes and sizes, from full manual, cable and vacuum-controlled systems like
those found on Loyale models, to the fully automatic electronically controlled
systems employed by the SVX and some Legacy models. Because of this great
diversity in Subaru air conditioning systems, it would be impossible to tell you
everything there is to know about every single Subaru air conditioning system in
this edition of The End Wrench.
I n t r o d u c t i o n
What we will do instead is to give you a cross-section summary of recent
Subaru air conditioning systems. We'll show you what's unique and different
about each system, and describe the best troubleshooting and repair strategies
for these systems.
In compliance with government requirements, all Subaru vehicles manufactured
within the past few years are equipped with R-134a air conditioning systems.
But there are still a large percentage of Subaru vehicles on the road with R-12
refrigerant in their A/C sytems. We'll explain how to safely handle R-12 and
R-134a refrigerants, and we'll also explain your repair and retrofit options
when a Subaru equipped with an R-12 air conditioning system comes to your
shop for repairs.
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Related Manuals for Subaru R-12
Summary of Contents for Subaru R-12
- Page 1 R-134a air conditioning systems. But there are still a large percentage of Subaru vehicles on the road with R-12 refrigerant in their A/C sytems. We’ll explain how to safely handle R-12 and R-134a refrigerants, and we’ll also explain your repair and retrofit options...
- Page 2 A/C Cut System This system is installed on many 1987 and later model year automatic transaxle equipped Subaru vehicles. The purpose of the A/C cut system is to improve engine performance during full throttle acceleration. Refer to the chart to determine component application for the various models listed.
- Page 3 When the adjusting screw is turned counter clockwise, bypass air/fuel is increased and the idle speed is increased. Note: Always refer to the appropriate Justy model year Subaru Service Manual sections 2-2 and 2-6 for the proper ECVT FICD adjustment procedures and specifications.
- Page 4 Troubleshooting and Servicing Six Step Troubleshooting The following six step method of troubleshooting will save time and effort in the diagnosis and analysis of air conditioning problems. It provides a logical approach to solving the problem, not just treating the symptoms. The steps are as follows: Verify the problem (Operational check) Check that the problem does exist.
- Page 5 (126 degrees F.) Do not use refrigerant in confined spaces with poor ventilation. Do not use R-12 refrigerant in the presence of an open flame. Do not steam clean system. Do not drop refrigerant containers or otherwise cause the container to rupture.
- Page 6 Discharging Caution: Refrigerant R-12 has been identified as a compound which causes damage to the ozone layer. It is unlawful to discharge R-12 into the atmosphere. Subaru of America encourages you to handle R-12 in a responsible and safe manner, and according to Federal EPA guidelines and any local and state regulations.
- Page 7 Electronic leak detectors usually buzz or squeal in the presence of refrigerant. Always follow the leak detector manufacturer’s instruc- tions for proper use. It is Subaru policy to not use flame-type detectors, because harmful gasses may be emitted when using these types of detectors.
- Page 8 Subaru Ai r Condi t i o ni n g Systems Fill the compressor with the proper amount of the correct type refrigerant oil. Use of the incorrect type of compressor oil may result in damage to the com- pressor. Refer to Subaru Service Bulletin number 10-37-84, dated 12-12-84, for compressor oil specifications for Matsushita (Panasonic), Hitachi, Lone Star and other compressor types.
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Page 9: Performance Test Results
Subaru Ai r Condi t i o ni n g Systems Performance Test Results Standard Compressor Systems System performs to specifications; test complete Higher than normal pressures indicate: —Restriction of air across condenser —Defective cooling fan(s) —Refrigerant overcharge —Restriction in system —Air in system...