Denso 4EA Key Fob

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Denso 4EA Key Fob
HYQ4EA KeyFob.jpg
Frequencies 433.92 MHz
Frequency Range 433.92 MHz - 433.92 MHz
Mode AM
Modulation AM,ASK
Emission Designator
Bandwidth 15 kHz
Location Worldwide
Short Description Denso Wireless Key Fob 4EA built by Denso Corporation for General Motors auto brands Chevrolet and Buick. Used on Chevrolet Camaro and Malibu from 2016+. Used on Buick Lacrosse 2017+.
I/Q Raw Recording Download file
Audio Sample

Denso 4EA Key Fob is a wireless key fob built for General Motors of North America by Denso Corporation in Japan. Used on Chevrolet Camaro and Malibu from 2016+. Used on Buick Lacrosse 2017+. The wireless key fob utilizes either ASKAmplitude-Shift Keying or FSKFrequency-Shift Keying modulation. (In this page, only ASKAmplitude-Shift Keying is shown).

Pulse width is measured to be 120 us, giving an effective max datarate of 8333 bpsBits per second (bps). Frame width is 34.3ms.


AMAmplitude Modulation Demodulated:

USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) Demodulated:

Samples captured from a 2017 Chevrolet Malibu in the United States. A 4-button model was used to test. Each button was pressed, which results in a frame train. There are 4 frame trains heard in these samples. IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. sample provided in the infobox is the raw recording of this test.


433.92 MHzMegaHertz (MHz) 10^6 Hz

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