11th Gen Toyota Altis Aircon Problem

[_Cathy_]

Trading or selling the car is NOT AN OPTION as mentioned in my first post.

[ninjababez]

isang casa lang ba humawak Cathy?

[_Cathy_]

isang casa lang ba humawak Cathy?

Yes. And it's far from where I live!

[oj88]

The type of problem your car is having requires systematic diagnostics. Barring any mechanical problems like faulty fans/blowers, leaks, compressor issues and such, the minimum tools of the trade would usually include Toyota's OBDII scanner (TIS Techstream), and a standard room thermometer.

My guess at this point is that it may have something to do with the A/C control module and its sensor(s). Simply put, once a preset temp is entered by the driver, the control unit will do its best to achieve that temp using its own temp sensor. Once the desired temp is achieved, it sends out a signal to disengage the compressor. If the A/C control module is acting up or its sensor has become out-of-spec, or probably even blocked, it can give off the wrong feedback to the controller. Bad info in, bad info out.

Using Toyota's OBDII scanner, the technician may be able to get the temperature that is actually being detected by the A/C temp sensor through the CAN bus (Controller Area Network - The network that makes it possible for different car components like door locks, SRS, A/C, ECM/PCM, etc. to be able talk to each other). The room thermometer can be used to validate the cabin temp. If they're off by several degrees from what the TIS is saying, even after the A/C has been running for several minutes with the car under the shade, I'd swap out that controller and/or sensor for a known good one for testing.

The car's A/C temp sensor is usually behind a grilled opening on the dashboard near the knee area. On the Altis, that would be the small opening besides the Engine Start button. If this is blocked or if the sensor is defective/out-of-spec, or dislodged, it may not read the cabin temp correctly.

I hope you get this sorted out eventually.

[ninjababez]

try nalang sa iba. baka tang* tang* service dyan

[99moves]

isang casa lang ba ang pinagdalhan mo maam? have you tried other casas?

you could bring it to reputable shops other than the casa just for diagnosis. para lang malaman ang sira talaga. para pag balik mo sa casa may idea ka kung ano sira. bad trip kasi pag alam mo nang may sira kaso yung mga unggoy sa casa panay hula lang ginagawa.

and mark the parts na alam mong kailangan palitan. sulatan mo ng pentel yung compressor para alam mo kung pinalitan nga.

[_Cathy_]

isang casa lang ba ang pinagdalhan mo maam? have you tried other casas?

you could bring it to reputable shops other than the casa just for diagnosis. para lang malaman ang sira talaga. para pag balik mo sa casa may idea ka kung ano sira. bad trip kasi pag alam mo nang may sira kaso yung mga unggoy sa casa panay hula lang ginagawa.

and mark the parts na alam mong kailangan palitan. sulatan mo ng pentel yung compressor para alam mo kung pinalitan nga.

Yes. I have been going to the same casa for over 5 years already to the same service advisor. Kaya nagdadalawang isip ako magpunta sa ibang casa. I don't make appointments anymore and parts are replaced immediately. When my 10th gen had a problem after PMS, they even picked up my car at home. But then he got promoted already kaya siguro iba na talaga pag hindi na siya yung nakatutok. But this time I will try another casa na.