September 2022 - 24

practices around static camera calibration best practices. There are
a number of aftermarket tooling solutions available. Personally, I
have used the Autel Complete Solution (Red Frame w/cameras),
the Bosch DAS3000, and others such as the John Bean EZ-ADAS.
All three of these systems have focused on making the technician
more productive without sacrificing accuracy. But beware, you
should get in the habit of making sure that the target sizing aligns
with what the manufacturer originally specified.
CASE STUDY - 2021 TOYOTA RAV4
My shop had a client inquire about the behavior of their lane keeping
system. Specifically, the lane tracing assist (LTA) system was
allowing the vehicle's right-side tires to cross over the right-side
lane lines. When in the lane keep assist (LKA) mode, the vehicle
would warn the driver about approaching the left lane line about
what one would expect, but for the right side, it was all happening
well after the right-side tires passed over the lane lines. During the
intake, we discovered the vehicle had recently had a replacement
windshield installed, and this is when the symptoms surfaced. We
commenced with analyzing the vehicle data by performing a complete
health check, where there were no DTCs stored in any of the
systems related to the complaints.
Using Toyota Techstream, we looked at the vehicle control
p Figure 8- Factory Toyota Rav4 windshield OEM bracket
history and could see that the vehicle recently had the camera
calibrated, and the calibration process had been completed. We
then looked at the initial axis value that was recorded during that
calibration and saved a copy (Figure 6). Looking at the horizontal
axis value had me concerned.
From my understanding, this is a pixel value used in establishing
the baseline relationship to the imaging sensor with a
known vehicle datum reference such as the vehicle centerline.
The windshield mounted camera on this vehicle is vehicle centerline.
I usually see these vehicles with that horizontal number
in the ~630 range.
My next inspection was to look at the windshield branding. I
p Figure 9- Axis values after new windshield
and lane camera calibration
Some vehicle manufacturers require special tooling such as
static targets. Entering this market trying to become service-ready
on every carline will be extremely challenging, but if you do your
homework and find your addressable market, you'll be on your
way to creating a business plan. However, there are a few items
you should be aware of.
The primary consideration is workspace. Some operations
such as static camera/radar calibrations require a large amount
of workspace with an extremely level floor. Additionally, when
static camera calibrations are required, certain lighting conditions
may present challenges. Reference service information for best
24 PTEN SEPTEMBER 2022 www.VehicleServicePros.com
found the windshield was from the same supplier as the OEM,
but it was missing the OEM naming. I then decided to take a
closer look at the camera mount, which is glued in place to the
windshield to see if there were any noticeable challenges, and
this is when I decided we were going to recommend a factory
windshield. Figure 7 shows the mount wasn't properly indexed to
the exact coordinates designated by the diamond shaped markers
on the windshield.
If you look along the right side of the camera mounting bracket,
you'll see two vertical lines that were used to measure the angles
after establishing the reference line at 0.000 degrees at the horizontal
line indicated by the arrow on the left side of the bracket.
Also, you can see where the camera heater had to be transferred
from the old windshield, which still had part of the broken camera
mount attached to the harness at the top left.
We received approval to install a new OEM windshield and when
we received it, I took an image of it for comparison (Figure 8).
http://www.VehicleServicePros.com
September 2022

Table of Contents for the Digital Edition of September 2022
