A/C Switch (Avalon, Camry, Camry Solara, Celica, Corolla, ECHO, Matrix, MR2, RAV4, Sequoia, Sienna, Tacoma, Tundra & 4Runner)
WARNING: This page does not describe the selected car, but rather 17 other vehicles, including the 2003 Toyota Tundra, 2003 Toyota Tacoma, 2003 Toyota Sienna, 2003 Toyota Sequoia, and 2003 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
When A/C is turned on, input signal is delivered to Engine Control Module (ECM). ECM may use input signal for controlling engine operation. Input signal may be delivered from A/C switch, A/C amplifier, A/C control assembly or A/C clutch depending on model application.