December 2023 - 14
translate. Additionally, OBD-II regulations
require that the data reported must
be accurate and reflect real-time conditions
of the vehicle. However, there are
exceptions where there is an allowance
for some modules to substitute data under
specific fault conditions to prevent damage
due to other systems relying on this
data to perform functions and or allow
limp-home modes.
DATA PRESENTATION
Possessing the power to display the data
in certain ways can be highly beneficial
to the diagnostician in navigating this
complicated matrix. For example, having
the ability to overlay data on one timeline with controllable
Y-axes in my opinion is extremely powerful as I will demonstrate
later in this article in some real-world examples.
In other cases, one might benefit from being able to display
a 3-D graph of data when addressing certain problems as
shown in Figure 2.
OBD-II MONITORS
In many states, motor vehicles are subject to periodic inspection
and maintenance programs (I&M) which include an
OBD-II system interrogation. For the most part, the vehicle
shouldn't have any DTCs set or monitors in a non-completed
state. However, there are some exceptions. Following a repair
p Figure 2 - Turbo boost error graph
Photo courtesy of Scott Brown
and a code clear will result in the monitors being cleared.
Usually, the technician will want to execute proper drive
cycles so that the vehicle will run and complete the OBD-II.
However, there may be conditional prerequisites the vehicle
needs to be within for a monitor to be enabled to run. I'm sure
that you would agree that it is extremely important to know
if the monitor you're trying to run to is currently enabled or
not. PID $41 shown in Figure 3 will let the technician know
whether a particular monitor is enabled for the current drive
cycle. Knowing where to obtain that information is extremely
critical. Some tools also do a good job of displaying monitor
status graphically such as the eScan from Automotive Test
Solutions (Figure 4).
p Figure 3 - Silver scan tool PID $41 monitor data
Photo courtesy of Scott Brown
14 PTEN DECEMBER 2023 www.VehicleServicePros.com
http://www.VehicleServicePros.com
December 2023
Table of Contents for the Digital Edition of December 2023
EDITOR'S NOTE
NEW PRODUCTS
DIAGNOSTIC TECH
AAPEX/SEMA EDITOR’S PICKS
TOP 100 PRODUCTS
TOOL BRIEFING
TOOL REVIEWS
INNOVATION AWARDS PROFILE
CATEGORY SPOTLIGHT
BIG-TIME BOXES
A systematic approach to finding the right scan tool
Old tools, new tricks
Are you calibrating ADAS-equipped vehicles?
A step-by-step guide with expert insights on mastering ADAS tech recalibration
Diagnostic products
December 2023 - 1
December 2023 - 2
December 2023 - 3
December 2023 - 4
December 2023 - 5
December 2023 - 6
December 2023 - 7
December 2023 - EDITOR'S NOTE
December 2023 - 9
December 2023 - NEW PRODUCTS
December 2023 - RSC1
December 2023 - RSC2
December 2023 - 11
December 2023 - DIAGNOSTIC TECH
December 2023 - 13
December 2023 - 14
December 2023 - 15
December 2023 - 16
December 2023 - 17
December 2023 - 18
December 2023 - 19
December 2023 - AAPEX/SEMA EDITOR’S PICKS
December 2023 - 21
December 2023 - TOP 100 PRODUCTS
December 2023 - 23
December 2023 - 24
December 2023 - 25
December 2023 - 26
December 2023 - 27
December 2023 - TOOL BRIEFING
December 2023 - 29
December 2023 - 30
December 2023 - 31
December 2023 - 32
December 2023 - 33
December 2023 - TOOL REVIEWS
December 2023 - 35
December 2023 - 36
December 2023 - 37
December 2023 - INNOVATION AWARDS PROFILE
December 2023 - CATEGORY SPOTLIGHT
December 2023 - 40
December 2023 - 41
December 2023 - BIG-TIME BOXES
December 2023 - 43
December 2023 - 44
December 2023 - S1
December 2023 - S2
December 2023 - S3
December 2023 - A systematic approach to finding the right scan tool
December 2023 - S5
December 2023 - S6
December 2023 - S7
December 2023 - S8
December 2023 - S9
December 2023 - Old tools, new tricks
December 2023 - S11
December 2023 - S12
December 2023 - S13
December 2023 - Are you calibrating ADAS-equipped vehicles?
December 2023 - S15
December 2023 - S16
December 2023 - S17
December 2023 - A step-by-step guide with expert insights on mastering ADAS tech recalibration
December 2023 - S19
December 2023 - S20
December 2023 - Diagnostic products
December 2023 - S22
December 2023 - S23
December 2023 - S24
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