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Giammalvo’s Acquires New Scan Tool
If you’ve
ever experienced your ‘check engine’ or ‘service engine soon’ light on,
it can be a worrisome experience. In the past, we have addressed this
issue by connecting the Snap-On Scanner ‘Scan Tool ‘to your vehicle.
Scan Tools are computerized diagnostic devices that can be connected to
your car’s computer system via a connector in the driver’s compartment.
The device is similar to a downsized laptop with a modest sized screen.
The tool requires annual software cartridge updates so it will properly
communicate to present year vehicles.
Late this fall, we decided to replace our older Snap-On Scanner with
its modern day counterpart, the Snap-On Solus Pro. The Solus has more
diagnostic features and can be used to monitor various data, (known as
the datastream), that is constantly being shared back and forth from
your car’s computer to the many sensors and other computers that are
all interlinked on your car’s network.
The Solus uses Microsoft’s Windows CE Operating System. Although there
still may be some diagnostic codes that may need to still be diagnosed
by a dealer’s scan tool, the new Solus allows us to diagnose and repair
many more items on today’s vehicles. The Solus can even be connected to
a vehicle while its being driven. In this ‘live recording’ mode, it
will record the vehicle’s datastream. Our technicians can play back
this datastream ‘movie’ at the shop an analyze the data for
abnormalities caused by faulty wiring or sensors. Solus can even check
to see if your vehicle’s computer has any ‘pending codes’ that you
would not be aware of because your computer has not yet activated the
dash board check engine light.
Another neat feature of the Solus is that it does not require the
ordering of annual replacement cartridges as updates. We can now
purchase the updates electronically. The Snap-On Tool area
representative can connect the Solus to a link up system in his company
vehicle and the Solus will receive the annual update in a matter of
minutes.
The next time your vehicle is in for service, ask for us to connect the
Solus to check your vehicles on board electronic systems. Or, if your
just interested in what the tool looks like, just ask and will let you
check it out.
On The Technical Side
More About DataStreams
By: Mark Giammalvo
If you have had a performance or driveability problem with your car
that required testing of your vehicles onboard computer system, you
probably noticed wording on your repair order that talked about the use
of a scan tool and / or analysis of the datastream. The datastream is
the name given to the list of both sensor inputs and outputs that your
cars computer is seeing and controlling. The scan tool, (or brand is
now the Solus Pro), is a device that we use to connect to your cars
computer. It allows the technician to see the same information that
your computer is seeing. The scan tool was developed from aircraft
"black box" technology. Just like a plane's "black box" or what is
correctly called a flight data recorder, a vehicle can be driven with
the scan tool in record mode so that if a vehicle has an intermittent
problem, the technician can record the data and replay it back on the
main computer at the shop. Our technicians attend training throughout
the year to keep abreast of how to read the latest datastream
technology. The technician not only has to know what each item is, he
must know what each item should display. In addition, the readings
change as vehicle speed and load change. Below is a data stream
printout of a Pontiac Grand Am that came into the shop in the past. The
customer complained that the car was running rough and that there was
black smoke coming out of the tailpipe. Lets take a look at what the
technician saw while the car was idling in the service bay. The data
displayed on the scan tool changes every 1-2 seconds as the car is
idling this way the cars computer can always have fresh updated
information so it can make informed decisions. The readings
that follow represent a one second snapshot recorded by our scan tool.
The readings are normally abbreviated on the scan tool. We have spelled
out the names to make it easier to understand:
Sensor
Input or
Output
Current Reading
O2 (Oxygen
Sensor)
469 millivolts
Loop Status
Open/Closed
Open
TPS (Throttle
Position)
.40 volts
TPS% (Throttle
%)
0%
IAC (Idle Air
Control)
167 counts
Des Id ( Desired Idle
)
1200 RPM
MAF (Mass Air Flow to
Eng.)
11 gams per sec.
Pulse Width (Fuel Injector On
Time)
8.2 millisec.
Knk (Eng Knock
Yes/NO)
No
Prom Id (Program ID
Number)
3964
TIME (Time Since Key
On)
10 min 45 sec.
Batt (Battery
Volts)
13.2
CTS (Coolant
Temp)
41 F
BK (Brake Pedal
On/Off)
Off
CF1 (Cooling Fan 1
On/Off)
Off
AC (Air Conditioning On/Off
)
Off
VSS (Vehicle Speed
Signal)
0 mph
PRNDL (Transmission
Gear)
Park
BL (Block
Learn)
128
INT
(Integrator)
128
SPK AD (Spark Advance
)
0 deg
Decel Fu Ct. (Decelerate Fuel
Cut)
No
HA (High
Altitude)
No
Codes
No Codes Present
Believe it or not, this car
had a fairly small datastream and this particular problem was fairly
simple to spot to the trained eye. Some car’s datastreams are 80-100
lines long. In this particular data stream, we can see the following
information: The throttle is closed, we can see this by the 0% value.
This means that no one is currently stepping on the gas pedal. If this
reading was greater than 0% and no one was stepping on the gas, we
would know that the throttle position sensor or it’s circuit may be
faulty. The desired idle is unusually high at 1200 rpm. The desired
idle, is the idle speed of the engine that the computer wants and it
should be around 800 rpm on this model. The idle air control
motor is the device that the computer uses to control idle. This is
normally at 30 counts. For some reason, the computer wants the engines
idle to be higher, hence the 167 counts. This would explain the high
idle speed of 1200 rpm. The Mass Air Flow reading corresponds to the
amount of air in route to the engine from the air cleaner in grams per
second. This is generally around 3-4 gps at idle on this model. The
current reading of 11gps is high because the engine idle is so high.
The fuel injector on time is high at 8.2 milliseconds. With the car
idling, this is normally 1 or 2 milliseconds. This represents how long
the computer holds the fuel injectors open. The figure of 8.2 means the
computer is forcing the fuel injectors to spray a large amount of fuel
into the engine. This would explain the above high idle. But why does
the computer want all this extra fuel sprayed when normally a reading
of 1 or 2 milliseconds is only necessary at idle? Why is this figure
wrong? Is the computer faulty? Are the fuel injectors faulty?
Lets look further. The coolant temperature reading is 41 F. How can
this be? The car has been running for over 10 minuets and the engine is
hot to the touch. This is the source of all our trouble on this car.
After testing the coolant temperature sensor we found that it was
faulty. It was sending the computer a temperature signal that was too
cool. When we tested the temperature of the cars engine, we found it
was normal at 195 F. The computer was being told a lie about coolant
temperature form the coolant temperature sensor. The computer always
assumes the sensor readings coming in are correct. The cars computer
thought that the coolant temperature of the engine was 41 F. Based on
that information, the computer sprayed more fuel out the fuel injectors
in order to keep the engine running for a temperature reading of 41 F.
This is because a cold engine requires more fuel to stay running. That
resulted in all the other strange readings. All that extra fuel
explained the customer’s complaint of black smoke out the tailpipe and
rough running. It also explained the high idle readings. You may
be wondering...Why didn't the check engine light come on to warn me
that this sensor was bad? That's a good question. If a customer reports
that the check engine light is on, we will connect the scan tool to
read the data stream and look for a fault code. A fault code is a 2 or
3 digit code that the computer remembers when it detects a fault on one
of the vehicles sensors or sensor circuits. The fault code for low
coolant temperature on this car is code 15. When we reviewed the
datastream, code 15 was not present. Why? Lets look at the Pontiac
Service Manual to see the parameters for a code 15. The service
manual states: Code 15 will set if: Coolant Temperature is less than
-38 F for 60 seconds or more, or the coolant temperature sensor is
unplugged for 60 seconds or more, or coolant temperature sensor wire
#410 is open for 60 seconds or more. Although the coolant temperature
sensor was "out of range" at 41 F, it was not at -38 F so no codes were
set. Hope this helps shed some light on modern driveability
diagnostics.
Website Change
This
January we switched over to a new provider for the vehicle inventory
search page on our web site. If your in the market for a newer vehicle,
or just want to browse our lot from the comfort of your home, click on
the ‘Currently Available Quality Cars & Trucks’ link then click on
‘Search Our Inventory link’. You will then be able to view our entire
inventory of vehicles for sale or narrow the search to a specific make,
model or year. Once you click on an actual vehicle, you will be able to
see every option that specific car was built with as well as the
factory color name, government fuel economy figures, technical
specifications, photos and more. You can even print a color brochure of
the vehicle and its equipment right from your printer or fill out the
request form and we will mail you a brochure of all our vehicles
currently in inventory. Enjoy.
In Passing.
(Obituaries Courtesy The Standard Times)
Note: Due to recent requests, we will be adding family survivors to our customer’s obituaries as space allows.
Susan H. (Wilbur) Ashley,
80, of Acushnet died peacefully at home surrounded by her family on
November 9, 2007. She was the widow of former Acushnet selectman Elton
A. Ashley. Mrs. Ashley was born in New Bedford, daughter of the late
Earle T. and Ruth (Dudley) Wilbur, and grew up in Fairhaven. She
attended Fairhaven High School where she was active in sports, music
and was a cheerleader. She was a member of the Long Plain United
Methodist Church. She was a professional singer and dancer throughout
Southern New England visiting many service hospitals during World War
II. She formed the first Acushnet Midget Football cheering squad, was
chairman of the Miss Acushnet Centennial Pageant and took part in many
fundraising drives as a long time member of the Plymouth Girl Scout
Council serving as Neighborhood Chairman, District Chairman and Board
Member. Mrs. Ashley was a loving, caring mother who loved to spend time
with her family and will be missed dearly by them all. She is
survived by her children: Elton A. Ashley, Jr. and his wife Anne of
Rochester, Ruth D. Ashley of New Bedford, Michael F. Ashley and his
wife Diane of Acushnet, Marcia F. Lescorde of New Bedford, Frederick S.
Ashley and his wife Susan of North Carolina and William C. Ashley of
Acushnet; her faithful pet: Matilda; her good friend Pauline Rooney; 21
grandchildren; 27 great-grandchildren; and several nieces &
nephews. She was sister of the late Lyman D. Wilbur, Frederick S.
Wilbur, David Wilbur and Marjorie Fargo and grandmother of the late
Kristofer R. Vercellone.
Dr. William Lawrence Jenney
of New Bedford and Fairhaven, husband of 64 years to Marjorie Elizabeth
(Jason) Jenney passed away peacefully Thursday, Nov. 22, in the comfort
of his home after a lengthy illness. Born June 1, 1920, in New Bedford,
he was the son of the late Mildred Edna (Brownell) and William
Alexander Jenney. Youngest of three siblings, he survived both his
sisters, Charlotte B. (Jenney) Westman and Esther (Jenney) Parlin. Dr.
Jenney graduated with honors from New Bedford High School in 1939,
completed his undergraduate work magna cum laude in pre-med at Brown
University in 1943 and received his medical degree from Yale University
Medical School in 1945. He completed his residency at Hartford Hospital
and served in the Navy until 1948. Following this, he returned to New
Bedford as a family practitioner. From 1957 to 1961, he completed a
residency at Hartford Hospital in general surgery. Returning once again
to New Bedford, he, with the support of his devoted wife, Marjorie,
began his long and illustrious practice as a general surgeon.
Throughout his career, he attained numerous benchmarks, including Chief
of Staff at St. Luke's Hospital. He was a Fellow of the American
College of Surgeons, a member of the Massachusetts Medical Society, New
Bedford Chapter American Academy of General Practice, New Bedford
Medical Society and American Board of Surgery. He was an associate
professor at Tufts University and Harvard University medical schools.
He retired from practice in July 1987. A former executive board
member and chairman of the religious planning committee of the New
Bedford Port Society, Dr. Jenney served as a docent, piloting tours of
the Seamen's Bethel for several years. Long-time members of the
American Field Service, Dr. Jenney and his wife hosted several
students, including the first AFS student in New Bedford in 1954,
Mireille (T'sas) Beernaerts of Lasgne, Belgium; Dr. Anna M. Colli, of
Lake Como and Milan, Italy, in 1973; Yasuko Mokuno of Japan in 1974;
and Thomas Jopp of Germany in 1975. Dr. Jenney was an accomplished
musician, playing the xylophone, glockenspiel, organ, flute and
piccolo. Following his retirement, he played the flute and piccolo in
the Dartmouth Community Band and the Tri-County Symphonic Band, where
he served as vice-president. An avid sailor since childhood, Dr.,
Jenney enjoyed sharing the challenges of Buzzards Bay with his family
and friends. Ashore, he took great pride in preserving a working farm
in Fairhaven; recalling boyhood lessons instilled on the Lawrence Farm
in Portsmouth, R.I. Survivors include his widow; three children,
Claudia Brownell (Jenney) Simpson of Fairhaven, Lisa Morgan (Jenney)
Duncan and her husband, John Duncan, of Green Cove Springs, Fla., and
William Howland Jenney and his wife, Pamela Gray-Jenney of Fairhaven;
six grandchildren, Jennifer Morgan Simpson of Fairhaven, Steven James
Simpson of New Bedford, Anna Jean Gray- Jenney, Hailey Mae Gray-Jenney,
Laura Frances Gray-Storey and John Thomas Gray-Storey, all of
Fairhaven; his brother-in-law and friend David B. Parlin of Fall River;
and several nieces and nephews.
Kevin J. Cornell,
54, of Dartmouth died October 30, 2007 unexpectedly at home. He was the
husband and best friend of Susan A. (Perron) Cornell. Born in New
Bedford, the son of the late Robert N. and Teresa A. (Wade) Cornell, he
lived in New Bedford most of his life before moving to Dartmouth in
1999. Mr. Cornell was employed as a municipal surveyor with the
Department of Public Infrastructure for the City of New Bedford for 16
years. He was an active member of the Y.M.C.A and was an active walker.
Kevin had a great sense of humor, great smile and lived life to its
fullest. He served in the U.S. Navy Seabees during the Vietnam War.
Survivors include his wife; 2 brothers, Michael Cornell and Dennis
Cornell, and his wife Rachel, all of New Bedford; a sister, Mary Ellen
Cornell, and her longtime companion Dennis Avellar, of Dartmouth;
several nieces and nephews.
Susan A. (Perron) Cornell,
54, of Dartmouth died unexpectedly January 11, 2008. She was the wife
of the late Kevin J. Cornell. Born in New Bedford, the daughter of the
late William J. and Jeannette E. (LaBombard) Perron, she lived in New
Bedford most of her life before moving to Dartmouth in 1999. Susan was
formerly employed by St. Luke's Hospital as a medical technician for
many years. Survivors include her 3 brothers and 2 sisters, William J.
Perron, and his wife Joan, of Woodstock, CT, Carole McCarthy, and her
husband Ronald, of Limington, ME, Rita Daniels, and her husband Robert,
of Merrimac, MA, John "Jack" F. Perron, and his wife Janice and Thomas
G. Perron, and his wife Pamela, all of Fairhaven; and numerous nieces
and nephews.
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