A/C suddenly quit

[ktb973]

Yes the light does come on. I've found the manual for the ac.

http://www.etimago.com/yaris/repairm...nditioning.pdf

I haven't dug into all of the electrical yet, just the basics so far such as fuses, low pressure switch voltage and voltage to the compressor. Pressure switch was fine but that voltage to the compressor was under 3 volts.

I am capable of tracing it all out if it sounds electrical to you guys. I was just wondering if it's something simpler that I don't know about.

Thanks

[CTScott]

Originally Posted by ktb973

Yes the light does come on. I've found the manual for the ac.

http://www.etimago.com/yaris/repairm...nditioning.pdf

I haven't dug into all of the electrical yet, just the basics so far such as fuses, low pressure switch voltage and voltage to the compressor. Pressure switch was fine but that voltage to the compressor was under 3 volts.

I am capable of tracing it all out if it sounds electrical to you guys. I was just wondering if it's something simpler that I don't know about.

Thanks

If the light is on, then the AC Amplifier (ECU) is alive (and the A/C fuse is good). At this point, it would be ideal to be able to read the DTCs from the AC amplifier, but unfortunately that particular ECU will only report its DTCs via the Toyota TechStream tool.

So, I would verify the voltages on the pressure sensor and the evaporator temp sensor, and if they are both OK, I would probably opt to have someone plug in a TechStream tool.

It would be nice to be able to plug it into a Toyota Techstream

[ktb973]

If the light is on, then the AC Amplifier (ECU) is alive (and the A/C fuse is good). At this point, it would be ideal to be able to read the DTCs from the AC amplifier, but unfortunately that particular ECU will only report its DTCs via the Toyota TechStream tool.

So, I would verify the voltages on the pressure sensor and the evaporator temp sensor, and if they are both OK, I would probably opt to have someone plug in a TechStream tool.

It would be nice to be able to plug it into a Toyota Techstream

I have a code reader from mac tools. Think that will tell me anything? I'll try it anyway. The only reason I haven't yet is that it was in my car that my wife is driving now.

[CTScott]

Originally Posted by ktb973

I have a code reader from mac tools. Think that will tell me anything? I'll try it anyway. The only reason I haven't yet is that it was in my car that my wife is driving now.

No. It would have to support the Toyota diagnostics protocol, as opposed to OBDII.

[ktb973]

Thank you for your help. I think I will just take it in rather than going down a rat hole trying to diagnose it myself. It does seem like an electrical problem I suppose.