Tata Indica Vista Safire Aura - AC Problem

hi anil im from kerala me too facing A/C issue i enquired in st.antony motors kottayan regarding ECU change they told till now they didnt got any message from tata so they are unawrae,how is your a/c now any change after ecu replacement ?when you purchase your car i mean in which month?thanks in advance

Sam, I think we have met once. I bought my car in March 09 (manufactured in Jan 09). I had my ECU replaced, but improvement of AC is just marginal. I have replied to you in another thread. If you need something to be done from St. Antony's you need to bother them repeatedly with your problem, else they dont care much. 

sorry anil actually i cant remember u,so i think replacning ECU is not solving our problem ok anyway ill wait sometime...........thank you

friends please help me, i feel my a/c is not giving good cool i visted different service center all are given same answer my a/c working fine and grill temperature is 6 ?my vista was purchased nov 2008 ,what could be the reason for low cooling even griil temp is 6? as somebody mention they too face the a/c issue and solved with ECU upgradaton or cmpressor change,my doubt if my ECU or compressor has problem then how the grill temp comes 6?how ill make them to understand my problem?pls help

Yes, you need an ECU software upgrade or a hardware change. I too had a similar problem, but after the replacement the AC has improved (though marginally).

Having to change/upgrade the ECU (or its software) to solve the AC problems looks like bad design to me - I would have liked to think that the AC cut-off temperature would be something that's externally programmable (settable, rather like we have on those manual thermostats of yore) instead of being preset inside the ECU itself.

On the other hand having it preset inside the ECU would mean that nobody can tamper with it...

HELLO RENS AND ARUN i feel my a/c is not giving good cool i visted different service center all are given same answer my a/c working fine and grill temperature is 6 ?my vista was purchased nov 2008 ,what could be the reason for low cooling even griil temp is 6? friends im happy that u r problem related a/c was fixed afr ECU upgrade ,how they found your ECU has problem/what was grill temp{ac cooling temp)?

In my case the grill temp was around 6 - but the cut off was not related to this. So the problem was not with the thermistor or thermostat, but with the ECU. This is my conclusion.

Sunitha, actually there was no problem with the AC, so I haven't checked the grill temperature. The ECU upgrade is done regardless of the AC issue. This is done by TML experts directly and not by the service center people. This process will be done at all cities in phases as told by the TML personnel. So dont worry, it's just a matter of time.

thank you very much for your reply till now in kerala no dealers got any information regarding ECCU upgradation ok anyway ill wait thanks