1|Page
VEHICLE COMMUNICATION SYSTEM (LATEST)
QUESTIONS AND ANSWERS LATEST UPDATE
What modules is the vehicle configuration data typically saved in?
Select all that apply. ......ANSWER......BCM
TIPM
Which diagnostic strategy can be used while performing the Loss of
Comm Test to help isolate intermittent concerns? ......ANSWER......Not
Pull the fuse to each module
The Security Gateway (SGW) was introduced in what model year
vehicles? ......ANSWER......2018
With the bus active and no faults present, what voltages should be
measured on CAN-C (+)? ......ANSWER......2.6V-3.5V
True or False? A short to ground on CAN-B (+) will ALWAYS prevent
communication from occuring on the CAN-B bus. ......ANSWER......Not
True
Which resource should be used first for troubleshooting DRB III
Emulator concerns? ......ANSWER......Not STAR Support Center
pg. 1
,2|Page
Not Service Library
WiTech Knowledge Base
Which of the following communication networks is a single-wire
network? ......ANSWER......Not Automotive Ethernet
Legacy Networks (ALDL Networks)
CAN-C is being measured.
What should Meter A display based on the fault shown?
......ANSWER......0.0V
What type of fault could be indicated when all modules on a SINGLE bus
appear as unresponsive on the wiTECH topology? Select all that apply.
......ANSWER......Faulty Gateway Module
What are the key differences between CAN-FD and CAN-C? Select all
that apply. ......ANSWER......Similar bias voltage
Same termination resistance
CAN-FD modules can send larger messages at a faster transmission
speed
CAN-FD Modules can send up to 64 bytes between 500 kbps or 2 mbps
(FD- Flexible Data)
pg. 2
, 3|Page
With the bus active and no faults present, what voltages should be
measured on CAN-B (-)? ......ANSWER......4.65V-4.98V
CUSW found on? ......ANSWER......2013 Dodge Dart
2014 Jeep Cherokee
2015 Chrysler 200
Now only on the KL Cherokee
TIPM Found on? ......ANSWER......2020 RT Grand Caravan and Town and
Country
2018 JK Jeep Wrangler
2017 MK Jeep Compas
TIPM is combined BCM and PDC
CAN-C and IHS(older models use CAN-B instead of CAN-IHS similar to
FIAT7209
LIN (Local Interconnect Network) Bus ......ANSWER......Lower priority
modules
Smart Sensors
Actuators
Single Wire that provides less bandwidth than CAN
8 bytes at up to 19.2 kbps(25 times weaker than CAN-C
DMM averages voltage readings to 7-10 VDC while communicating
pg. 3
VEHICLE COMMUNICATION SYSTEM (LATEST)
QUESTIONS AND ANSWERS LATEST UPDATE
What modules is the vehicle configuration data typically saved in?
Select all that apply. ......ANSWER......BCM
TIPM
Which diagnostic strategy can be used while performing the Loss of
Comm Test to help isolate intermittent concerns? ......ANSWER......Not
Pull the fuse to each module
The Security Gateway (SGW) was introduced in what model year
vehicles? ......ANSWER......2018
With the bus active and no faults present, what voltages should be
measured on CAN-C (+)? ......ANSWER......2.6V-3.5V
True or False? A short to ground on CAN-B (+) will ALWAYS prevent
communication from occuring on the CAN-B bus. ......ANSWER......Not
True
Which resource should be used first for troubleshooting DRB III
Emulator concerns? ......ANSWER......Not STAR Support Center
pg. 1
,2|Page
Not Service Library
WiTech Knowledge Base
Which of the following communication networks is a single-wire
network? ......ANSWER......Not Automotive Ethernet
Legacy Networks (ALDL Networks)
CAN-C is being measured.
What should Meter A display based on the fault shown?
......ANSWER......0.0V
What type of fault could be indicated when all modules on a SINGLE bus
appear as unresponsive on the wiTECH topology? Select all that apply.
......ANSWER......Faulty Gateway Module
What are the key differences between CAN-FD and CAN-C? Select all
that apply. ......ANSWER......Similar bias voltage
Same termination resistance
CAN-FD modules can send larger messages at a faster transmission
speed
CAN-FD Modules can send up to 64 bytes between 500 kbps or 2 mbps
(FD- Flexible Data)
pg. 2
, 3|Page
With the bus active and no faults present, what voltages should be
measured on CAN-B (-)? ......ANSWER......4.65V-4.98V
CUSW found on? ......ANSWER......2013 Dodge Dart
2014 Jeep Cherokee
2015 Chrysler 200
Now only on the KL Cherokee
TIPM Found on? ......ANSWER......2020 RT Grand Caravan and Town and
Country
2018 JK Jeep Wrangler
2017 MK Jeep Compas
TIPM is combined BCM and PDC
CAN-C and IHS(older models use CAN-B instead of CAN-IHS similar to
FIAT7209
LIN (Local Interconnect Network) Bus ......ANSWER......Lower priority
modules
Smart Sensors
Actuators
Single Wire that provides less bandwidth than CAN
8 bytes at up to 19.2 kbps(25 times weaker than CAN-C
DMM averages voltage readings to 7-10 VDC while communicating
pg. 3
