those two wires go to the Air Conditioning (A/C) amplifier under the dash
The wiring diagrams don't tell us what each wire does, but the most likely reason why the E/G ECU has these leads to the A/C ECU is so it can tell the engine idle up when the A/C is on (to compensate for the compressor load).

Unfortunately, the list of abbreviations in the manual does not include that one, so maybe it is short for "actuator" and they thought it was common enough it didn't need defining? Just guessing.

If you really need to know what kind of signal is going through the wire, and if it is not merely a DC voltage, then you will need access to an oscilloscope.

 

Thank you very much friends, is that I just have problems with the idle up when turning on the AC the car does not compensate the load, check the cables that go from the compressor to the amplifier and they seem to send a signal, then check the 2 cables that go to the ECU, I disconnected the AC one and basically the IAC stopped working without the AC, I reconnected the cable and the IAC worked again without turning on the AC I mean in idle. I don't know what to sincerely check everything seems to work, check fuses, cables, everything I do not know if it is fart from the amplifier, IAC or the car computer.

 

ACT - Provides power to the A/C Amplifier.

VOLTAGE AT ENGINE CONTROL MODULE (ECU) WIRING CONNECTOR
--
9.0–14.0 VOLTS (ENGINE IDLING AND A/C SW ON)
BELOW 1.5 VOLTS (A/C SW OFF

A/C - Receives voltage from the A/C Amplifier.
--
A/C – E1 : BELOW 1.5 VOLTS (ENGINE IDLING AND A/C SW ON)
7.5–14.0 VOLTS (A/C SW OFF)

 

ACT - Provides power to the A/C Amplifier.

VOLTAGE AT ENGINE CONTROL MODULE (ECU) WIRING CONNECTOR
--
9.0–14.0 VOLTS (ENGINE IDLING AND A/C SW ON)
BELOW 1.5 VOLTS (A/C SW OFF

A/C - Receives voltage from the A/C Amplifier.
--
A/C – E1 : BELOW 1.5 VOLTS (ENGINE IDLING AND A/C SW ON)
7.5–14.0 VOLTS (A/C SW OFF)

Thank you very much for answering my friend, see that I disconnected the cable that sends the signal; to the ACT and literally nothing happened, should I have done something? check if there was voltage from the module what I did was use a test lead used to test fuses etc and when grounding the compressor it turned off

 

Yes, you should have checked voltage on the ACT and A/C lines as described in the post: under those running conditions.

No idle-up would indicate no (signal) from the A/C Amplifier ( to me anyway ) but dunno specifics, just answered your ACT question. *Not a Toyota A/C tech.

The Toyota service manual(s) for your year Camry should have a detailed Diagnostic tree / test procedure to determine (which) component in the A/C circuit ... is misbehaving.