12-13-2006, 11:32 PM
Re: A/C problem
"ferd berford" <email@example.com> wrote in message
> Ray O wrote:[color=green]
>> "ferd berford" <firstname.lastname@example.org> wrote in message
>>> HELLO wrote:
>>>> 2003 4 cyl Camry My a/c has been powering off (compressor lights start
>>>> blink) I took it to the neighborhood shop and they could not figure it
>>>> everything seemed in order (no charge) . I'm afraid of what the toyota
>>>> might charge so any Ideas on what is the problem is appreciated os I
>>>> go there & get blindsided.
>>> The blinking light means the compressor failed to start when the system
>>> called for A/C, most likely a bad compressor relay on such a new car,
>>> which is what my 2003 Camry needed. This was not too expensive, about
>>> $112 to fix it and $86 to diagnose it. In the worse case it is a bad
>>> compressor, middle case is a loss of R134 so the low pressure switch cut
>>> out the compressor. If it is a low gas condition make sure they find and
>>> fix the leak (for your sake and the environment).
>> Actually, the blinking light means that the compressor RPM sensor
>> detected a different compressor RPM from the engine RPM. To re-energize
>> the compressor, turn the AC button off and then back on. If you heard a
>> belt squeal just before the light started flashing, the belt slipped and
>> the system shut down. Even if you did not hear a belt squeal, check AC
>> compressor drive belt tension - with the engine OFF, you should not be
>> able to depress the belt more than about an inch. If you can depress the
>> belt more than an inch, it got stretched out over time or the adjustment
>> slipped. Check the condition of the compressor drive belt. It should not
>> be glazed or cracked on the underside.
>> If the system needs a refrigerant charge, you would not get a flashing AC
>> light, the compressor would just not engage. An easy way to check
>> refrigerant charge is to look at the sight glass on the receiver drier in
>> front of the radiator. The receiver drier is s cylinder with steel lines
>> going into and out of the top. With the AC on, it should look like water
>> is flowing past the glass. If you see foam or nothing, the system needs
> I wonder if I paid for a relay (and diagnostics) that was not needed.....
> A Toyota dealer wouldn't do that would they? Thanks for the information,
> I was going on what the service manager told me and a little bit of
> knowledge about the low pressure switch.
There is a technical service bulletin (TSB) # EL011-05 regarding the A/C
light flashing due to issues with the magnetic clutch relay. It is possible
that is the cause if the belt is OK.
(correct punctuation to reply)