December 2022 - S7
COMMON DIAGNOSTICS
Gloria shared three common EV diagnostic-related
issues that he's come across.
For one, the warning lights on the
dashboard of EVs are different. Gloria
pointed out two: a wrench that means
non-emissions fault and an orange triangle
with an exclamation point, an ISO symbol
for " master warning " , that will appear
when there's something going on with the
high voltage system.
The high voltage battery is another
common issue. Gloria said to check the
battery by simply using a scan tool and
looking to see which block's value is under.
It's easy to do, yet many technicians don't
do it at first.
The third most common issue are
isolation faults where there's high voltage
leaking somewhere in the system such as
Cooling High-Voltage Batteries
High-voltage batteries run best between 65 degrees F
and 105 degrees F.
There are three ways to cool high voltage batteries -
1. Air cooled
2. Liquid cooled
3. Refrigerant cooled
If air cooled, the cabin filter must be clean to ensure proper operation (prevent
overheating of battery), Gloria noted.
Some manufacturers are using the AC system to cool the vehicle batteries. If this is
the case, then AC is no longer an option, Gloria noted. He adds that in many scenarios at
a shop, customers will decide not to spend $3,000 to fix an AC issue and will just " roll the
windows down " instead. Now, technicians are going to have to explain to customers to
rethink their decision because that $3,000 fix is now needed to cool a $10,000 battery.
the battery, wiring, inverter, etc. Using an
insulation tester, technicians can induce
high voltage at very low amperage (once
the battery is disconnected and verified
to be at 0V). This allows hyper-accurate
readings on all high-voltage circuit isolation
conditions.
In conclusion, as obvious as it may
seem, understanding the system you are
working on and diagnosing is key. If you
don't fully comprehend it all, simply ask
or use your resources.
" Plot your diagnostic strategy, " Gloria
said. " Plan your work, work your plan. "
For more information visit VehicleServicePros.com/11078899
2212PTENDIAGNOSTIC_CanDo.indd 1
11/9/22 11:50 AM
VehicleServicePros.com DECEMBER 2022 7
http://www.candointl.com
http://www.VehicleServicePros.com/11078899
http://www.VehicleServicePros.com
December 2022
Table of Contents for the Digital Edition of December 2022
EDITOR'S NOTE
NEW PRODUCTS
TOOL BRIEFING
DIAGNOSTIC TECH
TOOL REVIEWS
CATEGORY SPOTLIGHT
TOP 100 PRODUCTS
SEMA/AAPEX EDITOR'S PICKS
INNOVATION AWARDS PROFILE
SEMA/AAPEX WRAP UP
BIG-TIME BOXES
Diagnosing Progress
Common diagnostics and trends in hybrid and electric vehicles
Diagnosing faults on modern vehicles
The real cause of P0420/P0430 DTCs
How diagnostic tools cut through the ADAS confusion
When the tools become the tutor
Diagnostic products
December 2022 - 1
December 2022 - 2
December 2022 - 3
December 2022 - 4
December 2022 - 5
December 2022 - 6
December 2022 - EDITOR'S NOTE
December 2022 - NEW PRODUCTS
December 2022 - 9
December 2022 - 10
December 2022 - RSC1
December 2022 - RSC2
December 2022 - 11
December 2022 - TOOL BRIEFING
December 2022 - 13
December 2022 - 14
December 2022 - 15
December 2022 - 16
December 2022 - 17
December 2022 - DIAGNOSTIC TECH
December 2022 - 19
December 2022 - 20
December 2022 - 21
December 2022 - TOOL REVIEWS
December 2022 - 23
December 2022 - 24
December 2022 - 25
December 2022 - CATEGORY SPOTLIGHT
December 2022 - 27
December 2022 - 28
December 2022 - 29
December 2022 - 30
December 2022 - 31
December 2022 - TOP 100 PRODUCTS
December 2022 - 33
December 2022 - 34
December 2022 - 35
December 2022 - SEMA/AAPEX EDITOR'S PICKS
December 2022 - 37
December 2022 - INNOVATION AWARDS PROFILE
December 2022 - SEMA/AAPEX WRAP UP
December 2022 - 40
December 2022 - 41
December 2022 - BIG-TIME BOXES
December 2022 - 43
December 2022 - 44
December 2022 - S1
December 2022 - S2
December 2022 - S3
December 2022 - Diagnosing Progress
December 2022 - S5
December 2022 - Common diagnostics and trends in hybrid and electric vehicles
December 2022 - S7
December 2022 - Diagnosing faults on modern vehicles
December 2022 - S9
December 2022 - The real cause of P0420/P0430 DTCs
December 2022 - S11
December 2022 - How diagnostic tools cut through the ADAS confusion
December 2022 - S13
December 2022 - S14
December 2022 - S15
December 2022 - When the tools become the tutor
December 2022 - S17
December 2022 - S18
December 2022 - S19
December 2022 - S20
December 2022 - Diagnostic products
December 2022 - S22
December 2022 - S23
December 2022 - S24
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