april2022 - 35

MS909CV + BATTERY
and the calibration process. The general function of the ADAS components
is similar between brands, but the ADAS calibration process will differ.
Fortunately, Fred Andersky, director of government and industry affairs for
Bendix Commercial Vehicle Systems, said most truck OEMs make collision
mitigation technology standard on their highway vehicles in the heavy-duty
market. And there are really only three collision mitigation technologies
in the heavy-duty truck market-Bendix Wingman, Wabco OnGuard, and
Detroit Assurance-limiting confusion in that sector. " Each system has its
own set of maintenance rules that are published by the manufacturer just
like with any other system on the vehicle, " he said.
Understanding the importance of tools
Marcos Obispo, director of sales for Cojali USA's commercial vehicles division,
said everybody seems to understand the safety benefits of ADAS, however,
the lack of regulation has slowed adoption, and therefore the need for shops
to invest in calibration equipment and training for technicians.
Calibration tools are helping to provide all necessary information to technicians
so they can prepare for the calibration and better estimate the time
to repair, Krebs said.
Alexander said advanced scan tools will include detailed steps on how to
set up the targets and framework, providing technicians greater confidence.
McGuire said his technicians utilize OEM information as well as calibration
tools. " We like to have both. For a technician to work on it without a tool,
they become almost a liability rather than an asset, " he said. " You can have a
great technician, but without accurate, up-to-date service information, you're
chasing things you shouldn't have to chase. "
Completing an ADAS calibration using the standard OE process can take
up to an hour, McKinney said, but with Bosch's DAS 3000's approach, that
exact calibration can be completed in under 10 minutes.
Obispo said calibrations could be either dynamic or static, which are not
interchangeable. Some systems can be calibrated by driving the vehicle while
using a hand-held or diagnostics device connected to the ADAS, which is the
dynamic calibration. The tool will tell the technician how to drive during the
calibration, according to the manufacturer. Static calibrations are performed
with the vehicle stopped. " In this case, we would need specific, sensitive
calibration equipment to calibrate and test the ADAS modules to ensure
their correct functioning, " he explained.
Not all shops have the right tools needed to perform static calibrations,
which can cause them to lose income. If repairers want to continue being
competitive, they will have to seriously consider this new market demand,
Obispo explained.
Meeting technicians' challenges
The most common obstacle techs face is familiarity with the calibration
process. " As with any newer technology, it is taking time for technicians to
become comfortable with ADAS and gain the knowledge specific to calibrations, "
Alexander said. " Until that time, a limited number of technicians will be
willing and trained to perform the calibrations, resulting in labor shortages. "
Brian Screeton, supervisor of technical service training at Bendix
Commercial Vehicle Systems, said radar alignment tends to be one of the top
issues technicians encounter. " While radars today do a great job in adjusting
their alignment, it can still happen that a radar needs to be aligned by the
technician, " he said. " The other issues typically tie to the braking system. If
the ABS goes out, then both stability and collision mitigation are deactivated.
If stability goes out, then collision mitigation is deactivated. "
Often, issues with ABS tie to wheel speed sensors with the gap between
sensor and tone ring being too great because the sensor was pushed back in
the clip during a previous wheel end repair or a worn spring clip, Screeton
said. Another area often overlooked is some type of wiring harness issue,
such as a wire casing that may be cut, he explained.
One of the stumbling blocks for technicians when repairing ADAS is
not looking beyond it. ADAS relies on information from many other parts
of the vehicle, including the ABS and stability systems. " Other systems,
mainly the drivetrain, supply information that ADAS requires to function
correctly, " Screeton said. For example, an 'Adaptive Cruise Fault' could
be activated by ADAS, and the root cause of the fault could stem from an
engine issue.
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©2022 AUTEL U.S. INC., ALL RIGHTS RESERVED
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april2022

Table of Contents for the Digital Edition of april2022
