Camry A/C Problem???? - Toyota Nation Forum : Toyota Car and Truck Forums

AliRazoR · 07-13-2010, 10:43 AM

I have camry 2002, 5sfe engine
My A/C button is flashing, what should i do?

chronoti · 07-13-2010, 10:52 AM

check your belt tension, then look at your pressure switch should be near the battery next to the sight glass on the receiver/dryer

AliRazoR · 07-13-2010, 11:06 AM

how can i check the belt tension, i don't have that tool

chronoti · 07-13-2010, 11:32 AM

auto zone tool rental? or just push it with a ruler an have another stick to measure the movement

http://www.ehow.com/how_2350791_chec...rive-belt.html

AliRazoR · 07-13-2010, 11:34 AM

By the way i do not think the problem is belt, some one told me the problem is ECU

BamZipPow · 07-13-2010, 12:29 PM

Quote:

Originally Posted by AliRazoR

By the way i do not think the problem is belt, some one told me the problem is ECU

How did they come up with that analysis?

You haven't given us enough information. Is the AC clutch engaging? What did the sight glass look like? Are there any noises coming from the compressor?

AliRazoR · 07-13-2010, 12:42 PM

every thing is OK
i changed the compressor with new one(toyota original part)
i changed the receiver dryer, MG/CL relay, expansion valve
by the way the belts are new
Now tell me what is the problem with these information(BamZiPow)
if you know

chronoti · 07-13-2010, 01:11 PM

new belts expand and need to be readjusted a few months later, the ecu doesn't control the ac

there is a separate unit called the ac amplifier

most likely it's being caused by the pressure switch on the receiver

mdatrdcam · 07-13-2010, 01:13 PM

did it start flashing after you drove through a really big puddle, or the engine/underside of the car came into contact with a large amount of water? after driving through a really big area of standing water the a/c button started flashing in my gen 3.5. it eventually stopped flashing after i turned the a/c off, let it dry out a little then turned it back on. i have yet to have it happen in my 2001. i know thats not really any help, just trying to help you diagnose the problem.

AliRazoR · 07-13-2010, 01:17 PM

i do not know what is the pressure switch!
camry 2002, 5sfe engine DOES NOT HAVE AC AMPLIFIER.................................

AliRazoR · 07-13-2010, 01:19 PM

No,it is not water

chronoti · 07-13-2010, 01:40 PM

your right sorry the v6 has the external amplifier

you can see where the pressure switch is here

AliRazoR · 07-13-2010, 01:43 PM

my friend this is thermistor.i checked this as well.
if you see the image it is written ECM(or ECU) as i told you.
by the way i have this toyota repair manual.

hzt30 · 07-13-2010, 02:25 PM

Quote:

Originally Posted by AliRazoR

I have camry 2002, 5sfe engine
My A/C button is flashing, what should i do?

Other than the A/C light flashing, does the system work? Blinking A/C light usually shuts down the compressor and could indicate a problem with the RPM sensor in the compressor.

I have a 2000 5sfe and the A/C light flashes but the system works 100%.

93celicaconv · 07-13-2010, 06:28 PM

HTZ30 hit it on the head. A flashing A/C light means the A/C amplifier detected slippage between the compressor and the crankshaft. Toyota A/C compressors have an RPM sensor for this very purpose. Problems causing this could be loose belt tension, water on the belt, an A/C compressor clutch not fully engaging, or the A/C compressor is turning much harder than it should. The A/C flashing light is an A/C failsafe system, so when the A/C amplifier detects slippage on the A/C compressor, it does shut down the A/C system to avoid the potential of further damage.