october2023 - 46
DIAGNOSTIC TECH
is step one. When analyzing the diagram take note of where
each module is located (inside or outside) on the vehicle,
how it is wired into the network, and how termination is
provided. Some wiring diagrams do an excellent job of calling
out terminating resistors and their values while others
require more research to surface this information. Understanding
how the system is wired is crucial since you may
find a module serving as a Pass-Thru device (Figure 5)
potentially offering up a convenient testing location.
In the condition where the faults are intermittent (nonhard
fault) you may need to deconstruct the series of DTCs
initially encountered and compare those to new faults that
may have been set after a code clear. Using this information
can aid the technician with enough evidence to hold
against a module you suspect as being the source of the
intermittent failures.
For example, we recently had a 2015 Volkswagen Eos
arrive at the shop with the following complaints:
" The customer drove the vehicle in. The customer states that
the MIL steering and EPC light came on yesterday. The ABS
Figure 7 - CAN-Bus terminal resistance checking
Photo from ALLDATA Repair
light intermittently came on for about a week and the brake
light flashed. Inspect and advise on repairs. "
The initial inspection revealed the following list of faults:
Engine control module 1
* U1017:00/532 71:000 / ABS brake control module read
out DTC (active/static)
* U1017:00/532 71:000 / ABS brake control module read
out DTC (passive/sporadic)
* U0415:00/501 97:000 / Invalid data received from antilock
brake system control module (active/static)
* P0501:00/012 81:000 / Vehicle speed sensor 'A' range/
performance (active/static)
Transmission electronics
* 17106:000 / Output speed sensor circ., no signal (passive/
sporadic)
* 18201:000 / Transmission output speed sensor 2, no signal
(passive/sporadic)
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310PTED_Dynabrade.indd 1
46 Professional Distributor I October 2023 I VehicleServicePros.com
9/13/23 1:02 PM
* 18255:000 / Read DTC memory of ABS CM (passive/
sporadic)
Brakes
* 03840:000 / Right front speed sensor, incorrect signal
(passive/sporadic)
* 00285:003 / Right front ABS wheel speed sensor,
mechanical malfunction (passive/sporadic)
* 00285:012 / Right front ABS wheel speed sensor, electrical
error in circuit (passive/sporadic)
http://www.dynabrade.com
http://prodistributor.hotims.com/r5/search.asp?action=search&return_by_category=y
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/july2023
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https://www.nxtbook.com/endeavor/professionaldistributor/professional-distributor-july-2021
https://www.nxtbook.com/endeavor/professionaldistributor/june2021
https://www.nxtbook.com/endeavor/professionaldistributor/may2021
https://www.nxtbook.com/endeavor/professionaldistributor/professional_distributor_april_2021
https://www.nxtbook.com/endeavor/professionaldistributor/march2021
https://www.nxtbook.com/endeavor/professionaldistributor/february2021
https://www.nxtbook.com/endeavor/professionaldistributor/Diagnostic_Process_December_2020
https://www.nxtbook.com/endeavor/professionaldistributor/Professional_Distributor_December_2020
https://www.nxtbook.com/endeavor/professionaldistributor/october2020
https://www.nxtbook.com/endeavor/professionaldistributor/september2020
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https://www.nxtbook.com/endeavor/professionaldistributor/april2020
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https://www.nxtbook.com/endeavor/professionaldistributor/Hand_Tool_Supplement_0220
https://www.nxtbook.com/endeavor/professionaldistributor/february2020
https://www.nxtbook.com/endeavor/professionaldistributor/december2019
https://www.nxtbook.com/endeavor/professionaldistributor/heavydutydiagnosticsstudy2019
https://www.nxtbook.com/endeavor/professionaldistributor/october2019
https://www.nxtbook.com/endeavor/professionaldistributor/september2019
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https://www.nxtbook.com/endeavor/professionaldistributor/scantoolspecguide-june2019
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https://www.nxtbook.com/endeavor/professionaldistributor/april2019
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https://www.nxtbook.com/endeavor/professionaldistributor/february2019
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