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#1 |
![]() Drives: 2010 Toyota Yaris - Sedan 4 Do Join Date: Oct 2018
Location: Bergen County, NJ
Posts: 7
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A/C Pressure Test/Diagnosing in cold ambient temps
Question is:
If the ambient temperature (car parked outside since I don't have a big enough garage to work in) is between 35-40 f (around 0-4c) what pressure should the car be having? Service Manual states: When the refrigerant volume is correct, the gauge reading indicates as follows: Low pressure side: 0.15 to 0.25 MPa (1.5 to 2.5 kgf/cm2) High pressure side: 1.37 to 1.57 MPa (14 to 16 kgf/cm2) HINT: Pressure varies in accordance with certain conditions (outside air temperature, sunlight and wind). |
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#2 |
![]() ![]() ![]() ![]() ![]() Drives: 06 2ZR Turbo Yaris RS Join Date: Aug 2017
Location: Fredericton, New Brunswick, Canada
Posts: 2,384
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Interesting question. I just went through this. Here is a snippet from my service manual and one from a 'generic' site. The upper 1/2 of the second image shows the pressures by temperature. It's too early in the am for me to do the math
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__________________
2006 Yaris 5 Door RS 2ZR-FE (2011 Corolla 1.8L) Swapped, Automatic, T-28 Turbocharged (8 psi), HSD MonoPro Coilovers, DIY W/M Injection, custom 3" cold air intake, custom 2.5" exhaust, TRD rear sway bar, Penguin Garage 13mm spacers (rear), custom Civic front lip, full repaint, Android 6.0 7" touchscreen, Rockford Fosgate speakers, tweeters, NVX underseat subwoofer https://www.instagram.com/2zr_turbo_yarisrs/ Last edited by 06YarisRS; 12-23-2018 at 10:00 AM. |
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#3 | |
![]() Drives: 2010 Toyota Yaris - Sedan 4 Do Join Date: Oct 2018
Location: Bergen County, NJ
Posts: 7
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Thanks 06YarisRS looks like I now have an excuse to leave jersey winter weather to go somewhere warm down south just to recharge the A/C! I've seen that table chart before as well and was thinking of just scaling it to my current amb temps, then re checking as it gets warmer. Happy Holidays Everyone!
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#4 |
![]() ![]() ![]() ![]() ![]() ![]() Drives: '08 2zr swapped Vios M/T Join Date: Oct 2012
Location: Caledonia Ont.
Posts: 2,938
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I used the above charts as well and they seemed to work well for me
I'm assuming they dont want you refilling in sub zero temps as it can lead to over charging the system if you are not aware of pressure changed in relation to ambient temps
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No one ever wants to give a Yaris the point by... ![]() |
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#5 | |
![]() ![]() ![]() ![]() ![]() Drives: 06 2ZR Turbo Yaris RS Join Date: Aug 2017
Location: Fredericton, New Brunswick, Canada
Posts: 2,384
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Quote:
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__________________
2006 Yaris 5 Door RS 2ZR-FE (2011 Corolla 1.8L) Swapped, Automatic, T-28 Turbocharged (8 psi), HSD MonoPro Coilovers, DIY W/M Injection, custom 3" cold air intake, custom 2.5" exhaust, TRD rear sway bar, Penguin Garage 13mm spacers (rear), custom Civic front lip, full repaint, Android 6.0 7" touchscreen, Rockford Fosgate speakers, tweeters, NVX underseat subwoofer https://www.instagram.com/2zr_turbo_yarisrs/ |
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#6 |
![]() ![]() Drives: Toyota Vios Join Date: Feb 2013
Location: MY
Posts: 49
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thx for the chart. i like DIY.
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a/c, pressure |
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