Higher current flow than the fuse rating is usually why they blow. Higher current is usually caused by lower resistance in the circuit. Which fuse number is blowing and does It blow as soon as you install It ? Is It # 11 which feeds the PGM-FI sub relay ?
@@mymechanic5211 I meant to say its the "10 amp" fuse not 15 amp. Its the fuse for the compressor. At this moment I'm not sure if it blows right away or when the AC is turned on. I believe its a short but am wondering where its most likely to be shorted.
Fuse # 36 in page 1 is the only 10 amp fuse and It feeds many components, these 2 diagrams only show part of what fuse #36 feeds you will also need power distribution diagrams to see the full circuit. Since It feeds so many components you will have to be very observative on when the fuse blows in order to figure this out, for example does It blow when you turn the A/C on or when the cooling fans turn on or the blower motor is turned on etc..etc.. However, Fuse #20 7.5 amp on page 2 is the one that feeds the compressor if this is the one your talking about the problem is somewhere between the fuse and the compressor ground and most likely there's wiring damage possibly shorted to ground or the clutch electromagnet is physically damaged or shorted to ground. Inspect the wiring for damage and test for short to ground, do a resistance test on the clutch electromagnet windings and make sure they are not physically damaged or shorted to ground. Here were I'm @ we see a lot of wiring damage from rodents once in a while causing shorted wiring but mostly causing open circuits. Rodent droppings on top of the engine or by the battery is the first clue to this type of problem
I am working on the same car. When you jump the clutch you see a small spark there. I do not have that spark and the clutch wont jump. What should I check next?
Depending on the load the ckt is getting you might or might not see a spark. 1. Make sure that you have correct voltages @ the PDC (fuse box) so that you are sure you are transfering power. If you are sure you are transfering power and the clutch is not engaging then you need to go further down the ckt torwards the compressor. This video does not show that but I have another video that does It's on an Acura MDX this system is almost the same as the civic system aprox 95% Here is the link ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-SojcXd7TS-I.html
Hi, I have a 2007 civic hybrid and my compressor clutch is always engaged during operation. So what causes the compressor not to cycle a on and off while running the ac? Thanks!
I'm Versed on Hybrid Theory but don't work on them, Could be Electrical or Plumbing related... I'll look up wiring diagrams for your particular system when I'm back in a couple of days so I can give you an idea of possible causes. Questions : Is the A/C cooling ? Is the low side line freezing up ? Do you hear a hissing sound from your dash when you turn the A/C on ?
@@mymechanic5211 I put a new compressor, condenser, drier, evaporator, and expansion valve. I was getting cold air the first 2 weeks then starting to dissipate. I’ve never seen my ac clutch cycle to off and on . And now the static pressure is low at 40psi. I tried adding freon but it’s not as cold. I’m hoping it didn’t dry out my compressor because it was running continuously. As far my suction line being freezing cold before I don’t think so but it was cold. Thanks!
One thing I have to mention is The Safety Issues when working on High Voltage Systems... They can be Hazardous to Your Health, Make sure you know the Do's and Don'ts before attempting any repairs. With that being said... Sorry for the delay... Most likely I won't be able to help you with this seeing the type of compressor it has, It seems to be a High Voltage Compressor ( I don't work on Hybrids ). On some vehicles depending on the type of system the compressor clutch always being engaged is normal. But lets get down to basics of operation... Before we go any further I want to make sure we're on the same page, When you say static pressure you mean low side running pressure ? What are the running pressures for the low side and the high side ? When the system is off and the pressures are equalized what is the pressure on both low and high sides ? What is the ambient temperature where you're @ ?
@@mymechanic5211 I found out that the low side schrader valve is leaking. Evacuated, removed and replaced suction line, then recharged the system. AC blowing cold air again and suction line freezing cold but still don’t see the compressor cycling off and off. Maybe this is normal for this system like you said. Low side pressure is 30psi and 160psi while ac is running at 85 degrees ambient temperature. Low side and high side at 95 psi when not running and equalizes . Thank you for taking the time to help me and I really appreciated it!
Those pressures seem normal now that you serviced the system, Most systems that cycle the clutch do so when the low side is around 22psi for off time and 35 psi for on time and on systems that cycle the cooling / condenser fans depends on High side pressures, on time is around 250 to 275 psi and off time is around 225 psi If It stops cooling again before adding refrigerant or evacuating the system re-ck the pressures that will give a hint as to what is happening to the system. Good Luck.
It could be a few things, lets eliminate a couple Q: Can you hear the relay click ? Q: Is there voltage @ the compressor connector ? Q: How did you determine the relay is ok ?
