October 2022 - 31
2. Why couldn't we communicate with
electric power steering?
Because the flex ray network is down,
and that is the only network that it communicates
on.
ISOLATING THE FAULT
Our next step was to begin disconnecting
easily accessed modules on the flex
ray network and rescanning the network
for communication. We started with
the ABS module and also checked our
network communication and voltages
with our Snap-on Zeus oscilloscope.
The voltages for the network at the ABS
connector indicated there was no communication
activity present, so onto the
next module.
We then went for the electric power steering
module mounted on the power steering
rack. Bingo! We found battery voltage on
one of the network lines, and we could see
the other network line attempting to comp
Figure 4- Snap-on's Vantage Legend
two-channel graphing meter.
municate. Further inspection revealed the
network line had rubbed through and was
shorting to a battery voltage feed.
We repaired the wires, rescanned the
network, and we now had communication
restored. By looking at the topology map,
we can see all the other networks originated
from the ZGM (which is our network
p Figure 5- A Blue-Point intelligent
OBD-II breakout box.
gateway). You can think of a network gateway
as the translator, so that all the different
networks languages can share data.
Because of this, the breakout box would
only allow us to see between the OBD-II
connector and the ZGM module. All other
tests would have to be done intrusively with
an oscilloscope.
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October 2022
Table of Contents for the Digital Edition of October 2022
EDITOR'S NOTE
NEW PRODUCTS
DIAGNOSTIC TECH
TOOL BRIEFING
TOOL REVIEWS
PEOPLE’S CHOICE WINNERS
BEST YOUNG TECH
SOCIAL INFLUENCER
INNOVATION AWARDS PROFILE
CATEGORY SPOTLIGHT
BIG-TIME BOXES
October 2022 - 1
October 2022 - 2
October 2022 - 3
October 2022 - 4
October 2022 - 5
October 2022 - 6
October 2022 - 7
October 2022 - EDITOR'S NOTE
October 2022 - 9
October 2022 - NEW PRODUCTS
October 2022 - RSC1
October 2022 - RSC2
October 2022 - 11
October 2022 - 12
October 2022 - 13
October 2022 - 14
October 2022 - 15
October 2022 - 16
October 2022 - 17
October 2022 - 18
October 2022 - 19
October 2022 - 20
October 2022 - DIAGNOSTIC TECH
October 2022 - 22
October 2022 - 23
October 2022 - 24
October 2022 - 25
October 2022 - 26
October 2022 - 27
October 2022 - TOOL BRIEFING
October 2022 - 29
October 2022 - 30
October 2022 - 31
October 2022 - 32
October 2022 - 33
October 2022 - 34
October 2022 - 35
October 2022 - TOOL REVIEWS
October 2022 - 37
October 2022 - 38
October 2022 - 39
October 2022 - PEOPLE’S CHOICE WINNERS
October 2022 - 41
October 2022 - 42
October 2022 - 43
October 2022 - 44
October 2022 - 45
October 2022 - 46
October 2022 - 47
October 2022 - 48
October 2022 - 49
October 2022 - 50
October 2022 - 51
October 2022 - 52
October 2022 - 53
October 2022 - BEST YOUNG TECH
October 2022 - 55
October 2022 - 56
October 2022 - 57
October 2022 - SOCIAL INFLUENCER
October 2022 - INNOVATION AWARDS PROFILE
October 2022 - CATEGORY SPOTLIGHT
October 2022 - 61
October 2022 - 62
October 2022 - 63
October 2022 - 64
October 2022 - 65
October 2022 - BIG-TIME BOXES
October 2022 - 67
October 2022 - 68
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