The a/c on my 2006 honda pilot is not owrking and appears to have a low refrigerant charge. I want to recharge it and find the leak with die. what is the amount of 134a to be fully charged

So why are you here?

You have tried to charge the battery & maybe there
are other tests that could be done,but the battery
would appear to be done

You always start any testing for a problem with a good
battery capable of taking & holding a charge & at least
12.6 volts static

If your air conditioner needs recharging it is because the refrigerant chemical is leaking out of the system. Many people think that air conditioners naturally leak refrigerant, so they assume they have to take the car in every year for recharging. This is not true. The refrigerant is not supposed to leak. If the refrigerant is low, find and repair the leak. There should be no reason for a recharge.

The AC compressor will not engage unless the system is charged up with refrigerant, a low state of charge due to a leak will shut the compressor off. Have a set of gauges hooked up to the AC system and have the pressures checked to see if you have a leak. You must repair the leak before the system is recharged.

You don't recharge

If the system needs refrigerant, you have
a leak that needs to be repaired

The refrigerant is recovered,leak fixed,a
vacuum pulled & system properly charged

If you have no A/C training, you should not
be doing any type of work on any system

Vehicles don't follow the same principals
as commercial a/c

Against federal laws to let refrigerant into
the air & you will, as well as ruin your compressor
& system

R134 IS THE FREON USED IN THAT MODEL

If it wasn't blowing cold air before and after the recharge, it could be the thermo expansion valve.

The AC system is a sealed system. So if it is low on refrigerant it means you have a leak somewhere in the system. If there is no leak and you added refrigerant the system, it is probably overcharged.

Im assuming that the compressor kicks on. If it didn't you wouldn't have been able to charge the system.

HI. Here is a complete check list that will help you trouble shot this issue. You will find the problem in one or more of these areas stated below.

1. Check Drive Belts - The air conditioner utilizes a drive belt that supplies power to rotate the compressor, which is basically a refrigerant pump. If the belt fails the compressor has nothing to drive it, inspect and replace as needed to restore operation. If belt is intact proceed to the next step.

2. Check for Compressor Clutch Engagement - Turn the air conditioner to the "on" position and set controls to the coldest setting. Start the engine and allow to idle. Then open the hood and inspect the clutch at the front of the compressor, is it turning? "Engaged" if so, the system has enough refrigerant to activate. If the system is low on refrigerant it will not work properly. In this case an air conditioner recharge kit is needed to recharge the system. If the system is low on refrigerant it could cycle on and off, making a ticking noise. If the compressor clutch is not turning proceed to next step.

3. Inspect for Refrigerant Leaks - If the system has a large leak and no refrigerant remains it will not activate. First test system for a static pressure charge, with the engine off attach an ac gauge to the low side pressure port and check the state of charge. Depending on outside temperature there should be between 50 psi and 80 psi. (Cool and warm). A refrigerant leak detector is needed to inspect for leak, but if you do not have a leak detector there is an alternative method. The air conditioner system is designed to run with oil suspended in the refrigerant to lubricate the system. Check for oily residue outside the system by inspecting all hoses, compressor, condenser, evaporator or receiver drier and replace any component that has failed.

4. Inspect Fuses - Check under dash panel and under hood power distribution center. Replace failed fuses as needed, recheck system. If the new fuse fails when reinstalled a short circuit is present and requires diagnosing with a wiring schematic, follow circuits to locate short, repair as needed and recheck system.

5. Check Temperature Control Vents - The vents inside your car are controlled by a cable, electrical servo or vacuum servo. If the temperature blend door is not functioning properly it will cause warm air from the heater to exit the vents. To check this start the car and allow the engine idle, next turn the blower motor speed on low, switch the temperature control from warm to cold while your ear is close to the vents. You should hear the door move inside the heater box as it swings from open to close. If not, insect for a vacuum leak or a shorted motor in the servo, repair the leak or replace the servo motor.

the tires make steady noise , check the wheel bearing as noises get high and low at the same speed , and i also would check for diff if it's 4wd.

Hi there. Sounds like you need your A/C refrigerant re-charged. In general an A/C system will loose at least 10% of their effectiveness each year through loss of refrigerant. Best thing to do is have an A/C Specialist recharge the system, check for leaks and monitor the operating pressures in the A/C system thus checking the effectiveness of the complete A/C system. Hope this helps, Scottech

you need specialist equipment to charge a a/c system not to mention a license to work it, i recommend going to a a/c specialist as they can charge the system and find out why it leaked in the first place