J2716 Single Edge Nibble Transmission (SENT) protocol

Robby from New Market Mobile Technician Posted   Latest  

This has been around for a few years now, but I haven't heard much mention of it.  The earliest I've seen it implemented was in some of the 2013 GM ETB systems - used to transmit TP1 & TP2 data from the ETB to the PCM.  Ford recently started doing this too.  

Here's an excerpt from a 2013 Chevrolet Equinox ETB description & operation:

"The throttle position sensor provides a signal voltage that changes relative to throttle blade angle. The customized integrated circuit translates the voltage based position information into serial data using the Society of Automotive Engineers (SAE) J2716 Single Edge Nibble Transmission (SENT) protocol. The throttle position sensor information is transmitted between the throttle body and the ECM on the signal/serial data circuit. The ECM decodes the serial data signal and is used as voltages for throttle position sensor 1 and 2."

Wikipedia has an interesting article on it:

https://en.wikipedia.org/wiki/SENT_(protocol)

The system looks simple from a technician point of view - needs power, ground, and a signal wire to the ECM.  Anyone know of any other OE's using SENT?  I wonder how long it will be until the OE's start using this for other sensors too. 

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Scott from Warrnambool VIC

 

Manager
 

I have seen this on a VW Passat where it was used for the FP Sensor. 

Bosch are starting to include SENT protocol on some critical sensors, of their more recent systems (if the OEM requests). 

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Steve from Irvine

 

Instructor
 

Audi, VW, BMW, Kia, Hyundai, also use SENT/ smart sensors. One convension that I attended stated that there will be more of these smart sensors with the advent of Flex Ray and Ethernet.

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