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09-20-2011, 10:17 PM | #1 |
A/C Only blows cold when radiator fan comes on?? plz help
So living on the gulf coast of FLA really stinks when you have no AC and its even worse when it teases yah and only blows cold when the radiator fan comes on which isn't that often only really when your sitting somewhere in idle for about 10 minutes... has anyone ever had this issue ? Thanks a ton
-J |
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09-20-2011, 10:35 PM | #2 |
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Sounds like you are low on Freon.
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09-21-2011, 08:50 AM | #3 |
CTScott thank you for your kind reply... i have checked the pressure and level and freon is full! so mind boggling! is there a part, sensor, or switch that the AC system uses to kick the fan on when you turn the switch on in the car?? something is not activating the engine cooling fan when i turn the air on ! IF the fan is on from the car getting "hot" air blows icy cold
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09-21-2011, 09:02 AM | #4 |
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The AC Amplifier (ECU) talks to the ECM via CAN bus, and the control of the fan is done by the ECM. Can you tell if the compressor disengages when the fan is not running?
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09-22-2011, 01:34 AM | #5 |
yes it does disengage when fan is not running...
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09-22-2011, 06:54 AM | #6 |
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OK. That would make me think that it is kicking off due to an issue. It may be worth having a dealer or other repair shop with a TechStream tool plug into the car to see if the AC ECU has logged a DTC.
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09-22-2011, 08:49 AM | #7 |
Ok cool ill take it in ... Forgive my ignorance but your referring to a diagnostic check ...? and What exactly is DTC ... lol Thanks again !
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09-22-2011, 09:23 AM | #8 | |
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Quote:
Some of the other subsystems the Yaris can be made to flash their indicator lights to allow you to read their DTCs without the tool, but the AC system can't.
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09-26-2011, 08:11 AM | #9 |
Drives: toyota yaris sedan Join Date: Sep 2010
Location: SXM
Posts: 93
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@Callmejc27
HI I THINK I HAVE THE SAME PROBLEM SO CAN YOU TELL ME WHAT THE DEALER SAID |
10-01-2011, 04:12 PM | #10 |
MetalShark
Drives: 2008 Yaris LB Join Date: Oct 2008
Location: Mesa, AZ
Posts: 104
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The ECU cannot directly turn on the fan. A relay must be used to source that much current. It is unlikely that the relay has an auxiliary set of contacts to notify the ECU when it has failed. On my Yaris the fan comes on every time I turn on the AC.
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10-01-2011, 05:33 PM | #11 | |
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Quote:
Since the OP's fan and compressor both turn off, my suspicion is that the AC ECU is logging a DTC and shutting down the AC.
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10-01-2011, 10:34 PM | #12 | |
MetalShark
Drives: 2008 Yaris LB Join Date: Oct 2008
Location: Mesa, AZ
Posts: 104
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AC function
Quote:
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Absolutely red, Drawtite hitch, CAI, Insulated Header, Amsoil 5w-30, Mag-drain plug, Red-Line MT-90 tranny oil, Scotch-Guard, Window Tint, Dash rug, Custom short throw shifter, Lowered OEM arm rest, Super-Turbo muffler/w chrome slash cut tip., TRD rear sway bar, sticky pads, front shock tower bar, RS grill badge, VVT-i emblems, Second tire set from Tirerack.com, DISABLED DAY TIME RUNNING LIGHTS, platform- style locking custom bike rack. 86K miles so far. 5 years use now on ceramic wrapped insulated stainless-steel header. |
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10-01-2011, 10:40 PM | #13 | |
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Quote:
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10-03-2011, 09:44 PM | #14 |
Drives: toyota yaris sedan Join Date: Sep 2010
Location: SXM
Posts: 93
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so What the conclusion to the problem guys
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06-13-2012, 05:20 AM | #15 |
Drives: Yaris 2007 Sedan Join Date: Jul 2010
Location: Riyadh Saudi
Posts: 12
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conclusion..replace the compressor???......
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