october2023 - 41
Figure 1 - Wiring diagram, connector location
Photo from Tesla SI
area network) which is typically operating at 500kbps, and
we'll also briefly discuss local interconnect network (LIN)
which is a popular choice for low-speed, non-mission critical
communication due to its low cost.
Electrical fundamentals: An understanding of ohms
law, basic circuits, power, ground, voltage drop, and the ability
to understand and decipher wiring diagrams and knowing
where else to source information to establish a sound
understanding of the system you're currently addressing.
Tool awareness: Understand how to assess a tool's
strengths and weaknesses and how to apply them to make
the best use of the tool when the time is right. Possessing
basic DVOM skills will go a long way toward helping
the technician get on the right track to success, especially
regarding circuit resistance testing.
Diagnostic scenarios can be classified as either a hard
fault (good) or an intermittent fault (bad). We'll go over both.
For the most part, faults caused can be placed into
three buckets:
* Connections
* Module failure
* External influence
Within these buckets, we can tie the following conditions
to each.
CONNECTIONS
Connectors are potential failure points and can serve as
potential test and isolation points. Connection problems
can be caused by conditions such as terminal fretting, or
they could have been influenced by previous service events
or external influences such as moisture or improper testing
(otherwise known as maintenance-induced failure). Accurate
Figure 2 - Mercedes-Benz CAN junction points 2015 MY
Photo courtesy of Scott Brown
wiring diagrams and connector locator tools are essential
for proper troubleshooting (Figure 1).
Some manufacturers do an excellent job of locating network
junction points which can be extremely useful for
diagnostics such as shown in Figure 2.
MODULE FAILURE
Verification of bucket #1 is an absolute must before condemning
a module and possessing a solid understanding
Professional Distributor I October 2023 I VehicleServicePros.com 41
http://www.VehicleServicePros.com
october2023
Table of Contents for the Digital Edition of october2023
Editor's Note – The road to success at trade shows
Sneak Peek
Most Wanted
2023 PTEN People's Choice Award Winners
In Focus
Cover Story – Pinpointing the sale
Diagnostic Tech – Decoding automobile network communication challenges
Show Me Your Truck – Taking a leap of faith
Go Sell Something – Catching the prospect that got away
Driving Sales – Tire & Wheel Service
Tales from the Road – The tool bank
october2023 - 1
october2023 - 2
october2023 - 3
october2023 - Editor's Note – The road to success at trade shows
october2023 - 5
october2023 - Sneak Peek
october2023 - 7
october2023 - 8
october2023 - 9
october2023 - 10
october2023 - 11
october2023 - Most Wanted
october2023 - 13
october2023 - 2023 PTEN People's Choice Award Winners
october2023 - 15
october2023 - 16
october2023 - 17
october2023 - 18
october2023 - 19
october2023 - 20
october2023 - 21
october2023 - 22
october2023 - 23
october2023 - In Focus
october2023 - 25
october2023 - 26
october2023 - 27
october2023 - 28
october2023 - 29
october2023 - 30
october2023 - 31
october2023 - Cover Story – Pinpointing the sale
october2023 - 33
october2023 - 34
october2023 - 35
october2023 - 36
october2023 - 37
october2023 - 38
october2023 - 39
october2023 - Diagnostic Tech – Decoding automobile network communication challenges
october2023 - 41
october2023 - 42
october2023 - 43
october2023 - 44
october2023 - 45
october2023 - 46
october2023 - 47
october2023 - 48
october2023 - 49
october2023 - Show Me Your Truck – Taking a leap of faith
october2023 - 51
october2023 - Go Sell Something – Catching the prospect that got away
october2023 - 53
october2023 - Driving Sales – Tire & Wheel Service
october2023 - 55
october2023 - 56
october2023 - 57
october2023 - Tales from the Road – The tool bank
october2023 - 59
october2023 - 60
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https://www.nxtbook.com/endeavor/professionaldistributor/december2019
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