PTEN_0321 - 37
SMARTER DIAGNOSTICS
STARTS
HERE
MS909
Figure 5 - New SAS Data
ing service information, the wiring diagram quickly revealed that this sensor was
on the GM high-speed CAN expansion
bus with access available at pins 12 and
13 of the DLC.
It was certainly looking like there was
something wrong with the steering angle
sensor, but I wanted to know more, and
I knew who might be able to help me. I
reached out to Dmitriy Levchenkov
who I met on Diagnostic Network (diag.
net). Dmitriy holds a PhD in operations
research and industrial engineering, as
well as a master's degree in computer
science, both from Cornell University. I
started a discussion on DN and provided
him with a short recording of the expansion bus from the broken vehicle, along
with the same data from a similar vehicle.
He was able to take a look at the data and
identify that message ID (1 E5) was where
the SAS reports on. He was then able to
determine that bytes 2 and 3 are used to
report the angular position and byte 1 was
likely reporting sensor status, although
we were never able to find a data sheet on
the sensor.
After we replaced the defective sensor,
byte 1 HEX changed from 1C (see figure
4) to 5C (see figure 5). If you're interested
in seeing more, look for the reference link
in the sidebar.
MAXIFLASH VCI NEW PROTOCOLS
- OR -
GOING DEEP
There are other tools out there that let you
explore vehicle networks. Some software
applications can assist with deciphering
network messages. Learning more about
said software can help to de-mystify its
inner workings and let you gain a deeper
understanding and appreciation for vehicle networks.
MS919
MAXIFLASH VCI FIVE-IN-ONE VCMI
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PROFESSIONAL TOOL & EQUIPMENT NEWS 37
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PTEN_0321
Table of Contents for the Digital Edition of PTEN_0321
Editor's Note
Featured New Products
Tool Briefing
Tool Reviews
Diagnostic Tech
Category Spotlight
Marketplace
Big-Time Boxes
PTEN_0321 - 1
PTEN_0321 - 2
PTEN_0321 - 3
PTEN_0321 - 4
PTEN_0321 - 5
PTEN_0321 - 6
PTEN_0321 - 7
PTEN_0321 - Editor's Note
PTEN_0321 - Featured New Products
PTEN_0321 - 10
PTEN_0321 - 11
PTEN_0321 - 12
PTEN_0321 - 13
PTEN_0321 - 14
PTEN_0321 - 15
PTEN_0321 - 16
PTEN_0321 - 17
PTEN_0321 - 18
PTEN_0321 - 19
PTEN_0321 - 20
PTEN_0321 - RSC1
PTEN_0321 - RSC2
PTEN_0321 - 21
PTEN_0321 - 22
PTEN_0321 - 23
PTEN_0321 - 24
PTEN_0321 - 25
PTEN_0321 - Tool Briefing
PTEN_0321 - 27
PTEN_0321 - 28
PTEN_0321 - 29
PTEN_0321 - Tool Reviews
PTEN_0321 - 31
PTEN_0321 - 32
PTEN_0321 - 33
PTEN_0321 - Diagnostic Tech
PTEN_0321 - 35
PTEN_0321 - 36
PTEN_0321 - 37
PTEN_0321 - Category Spotlight
PTEN_0321 - 39
PTEN_0321 - 40
PTEN_0321 - 41
PTEN_0321 - 42
PTEN_0321 - 43
PTEN_0321 - 44
PTEN_0321 - Marketplace
PTEN_0321 - Big-Time Boxes
PTEN_0321 - 47
PTEN_0321 - 48
PTEN_0321 - 49
PTEN_0321 - 50
PTEN_0321 - 51
PTEN_0321 - 52
PTEN_0321 - 53
PTEN_0321 - 54
PTEN_0321 - 55
PTEN_0321 - 56
PTEN_0321 - 57
PTEN_0321 - 58
PTEN_0321 - 59
PTEN_0321 - 60
PTEN_0321 - 61
PTEN_0321 - 62
PTEN_0321 - 63
PTEN_0321 - 64
PTEN_0321 - 65
PTEN_0321 - 66
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PTEN_0321 - 68
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PTEN_0321 - 72
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