LS1M User`s Guide Palm OBD2 Scanner

LS1M
User’s Guide
Palm OBD2 Scanner
Version 1.6
Copyright by Mark Chauvin
Some images are from the Getting Started Guide or the Handbook for the PDA, by Palm
Page 2
Introduction
Thank you for your purchase of the LS1M Scanner.
The LS1M Scanner is a scan tool that can retrieve engine parameters and trouble codes from any GM vehicle that
has OBD-2 (On Board Diagnostics). This should include all GM cars & trucks from 1996 to present. In addition,
enhanced parameters for the LS1, L67 & L36 engines are also supported (see parameters list in the appendix).
LS1M ships with a Palm PDA, a Personal Data Assistant (PDA). If you’ve never used a Palm before, don’t worry.
LS1M was designed to be extremely easy to use, even for users not familiar with PDA’s. Also included with the
Palm are a hotsynch cable, OBD-2 interface cable, software CD and this manual.
OBD2 Cable
User’s Guide
Palm PDA
HotSynch Cable
Warning
Operation of the LS1M scanner while driving can pose a danger to you, your passengers and other drivers. Please
always keep your eyes on the road. If necessary, have someone else operate the scanner while you drive, or use the
logging functions to record data for later playback.
Palm Basics
No software installation is required before using LS1M. The program has been pre-loaded on the Palm PDA.
However, if you are not familiar with PDA’s, the following basic information should give you enough skill to use
the program.
More documentation on your Palm PDA can be found on the LS1M CD in the “Palm Docs” folder. In that folder,
there is a Getting Started Guide as well as the Palm PDA Handbook. To read these documents, you will have to
have Adobe Acrobat Reader installed. If you don’t have it installed yet (it’s a widely used, free program for viewing
.pdf files), you can install it off the LS1M CD from the “Acroread” folder.
Page 3
Power Button
To turn the Palm on, press the button. In the picture, it is located at the top, but some Palm PDA’s have the button
on the lower left. To turn off the Palm, simply press the power button again. If you press & hold the power button
for 2 seconds, the backlight will come on (for nighttime viewing). Hold it for 2 seconds again & the backlight will
go off.
Palms are designed to be used for brief periods many times during the day. As such, they don’t require long boot-up
times or shutdown procedures like a PC does. The Palm remembers exactly what screen is being displayed when
you turn it off, and when you turn it on again it will be at the same place. Also, Palms will typically turn themselves
off after a number of minutes if not used (like a screen saver). However, since this can be quite annoying when
you’re working on a car, LS1M disables this feature. If the Palm is left on for a considerable amount of time, the
Palm’s two AAA batteries will go dead. Under normal use, though, batteries in a Palm should be good for at least a
month.
Using the Stylus
Instead of using a mouse on a palm, you use a stylus, which is just a plastic pointer. The stylus should be in its
holder on the back of the Palm. To use it, pull it out & tap the display where you want to “click”. You should hear
a little ticking noise and whatever icon you click on will cause its associated program to run.
Speaking of icon’s, when you first start your Palm, you should see a screen full of program icons. To start a
particular program, tap the stylus on that program’s icon. To return to the main menu (set of icons), tap the area
near the bottom of the screen that looks like a house.
Page 4
LS1M Icon
“Home” button
Other pointing devices can be used (like a fingernail if you lose the stylus), but may damage the touch screen.
Replacement styluses are available at any computer store.
Connecting to the Car
Connecting the scanner to the car is simply a matter of finding the OBD-2 connector & connecting the cables
together. The connector is probably located under the dash on the driver’s side. It has 16 pins which are numbered
1-8 across the top, left to right, and 9-16 across the bottom. Pins 2, 4, 5 & 16 must be present (there should be a
little metal clip in those spots). If not, the vehicle may not have OBD-2. Some cars will have more pins, but at
least these 4 should be present
.
Plug the Cables In
Plug the hotsynch cable into the Palm. That’s the cable with the flat end that has a little round button on it. The
button should be facing the front of the Palm. Now plug the other end of the hotsynch cable into the matching DB9
connector on the OBD2 interface cable.
Page 5
Plug the other end of the OBD2 cable (red connector) into the OBD2 connector on the vehicle.
Before you begin scanning, you must move the vehicle’s key to the Run position. You don’t have to actually start
the car, but the key must be “on” in order for the scanner to talk to the car’s computer.
Using LS1M
Starting LS1M
To start LS1M, tap the “home” button until you see the LS1M icon.
Tap the LS1M icon to bring up the LS1M
Main Menu. From this main menu, tap any of the buttons to bring up the screen you want to use:
•
Nanny Scan: The basic scanning screen. Use this to view and/or log engine parameters.
•
Gauge: Displays just a few parameters in a large font. Useful for monitoring while driving.
•
Trouble Codes: Use this screen to view the trouble codes reported by the vehicle’s computer & reset the
Service Engine Soon light.
•
0-60 Test: This screen is used to measure a vehicle’s acceleration by timing it from a standing start to 60
mph.
•
Collect LTrims: This screen will work on cars equipped with LS1 engines and certain other GM vehicles.
It extracts the long-term fuel trims that the computer uses to adjust the air/fuel ratio.
•
Config: Set options on the behavior of the scanner.
Page 6
Engine type:
LS1M supports enhanced parameters on two types of engines: the LS1 V8 and the L67/L36 V6. Click on the Config
button to bring up the Config screen.
Engine type
Select which vehicle you intend to scan by clicking on the appropriate box on the screen, as shown above. (Note
that support for the L67 is only available with a combo LS1/L67 cable. Cables purchased before July 2003 may not
have the new chip installed. Upgrades are available.)
Click the “Test” button while the cable is connected to the car and the car’s key is in the “run” position. After a few
moments, a dialog box will pop up telling you which cable was detected and if there were any problems retrieving
standard or enhanced parameters. This can be useful when troubleshooting connection problems.
Using the Menu
Each LS1M screen, except the main menu, has its own menu. It is much like a pull-down menu in Windows. Click
the Menu button on the Palm to pull down an on-screen menu, then click on a menu item to select it, or click
anywhere else to make the menu go away. You can also click the name of the screen to bring up the menu
(“Nanny”) or click the “Home” button to return to the first screen.
Home Button
Screen Name
Menu
Menu Button
Page 7
Nanny Scan
To start the Nanny screen, click the large “Nanny Scan” button. This will bring up Page 1 of the Nanny screen.
Page Number
Status
Info Button
Scan Button
Parameter
Scan Time
Value
Units
Scan Number
Page Up
Page Down
To start scanning, click the “Scan” button on the screen, or press the Page-Up button. The mode at the top of the
screen should change from “Stopped” to “Scanning”, and you should see some values display on the screen. If you
see “T.O.” instead, that means there’s been a timeout error (no response from vehicle). Double-check the cables are
all in place & the key is “on”.
The number of milliseconds it takes to complete a scan is displayed in the lower right corner. In the lower left
corner of the screen is the scan number, which starts at zero & increments every time a page full of scanned data is
displayed.
In the upper right of the screen, click the “Info” button. This will change the data displayed from current (live)
values, to min, max, or averages for the listed parameters.
At the upper left of the screen, try clicking the “Page Back” and “Page Fwd” buttons. When you start the Nanny
screen for the first time, page 1 displays. There are 10 different pages of parameters which can be displayed. By
default, the first 6 are configured. Pressing the “Fwd” & “Back” buttons will cycle through the different pages.
To stop the scan, click the “Stop” button or press the “Page Down” button. To reset everything to zero (erase all
min/max/average values too), click the “Reset” button or press “Page Down” a second time. The status will change
to “Resetting“ for a couple of seconds, then return to “Stopped.” All parameters should now show zero value.
Logging
LS1M can save the data in an internal buffer for later playback. This is called logging. To initiate a log, click on the
Log button, or press the Page Up button twice (once to start scanning, once to start logging). The current status will
change to “Logging”. All of the data you see on the current page will be recorded in memory. In the lower left of
the screen, the Scan counter will show you how many scans have been logged.
During logging, while the scan number is incrementing, you can switch from Current data (with the “Info” button)
to Min, Max or Average. If you switch to another page (different parameters), it will empty out the buffer and start
logging the new page of parameters instead, starting with Scan 1. You cannot play back the logged data, however,
until you stop the scanning. To do that, click the “Stop” button or press the “Page Down” button once.
Page 8
Playing Back a Log
Once the scanning has stopped, the display automatically changes to “Log” data instead of “Current”. Now the
information on the screen is not current data, but the logged data from the internal memory buffer. The scan number
that’s being displayed is shown in the lower left corner.
Save Button
Next Button
Prev Button
Scan Number
Page Up
Page Down
To step back towards the beginning of the scan, click the “Prev” button or press the “Page Down” button. To step
forward, click the “Next” button or press “Page Up”. Hold the “Page Up” or “Page Down” button to step through
the scans rapidly. Notice the Scan number will change to show you what scan you are on, and the Scan Time value
will show how many milliseconds that particular scan took to complete.
Many times, you may want to concentrate on a small section of logged data. This could be after a run at the drag
strip, when you want to review engine parameters from the start to finish of the race. However, there could be
hundreds of scans in the buffer, but only 40 or 50 that interest you. To make it easier to review these, you can use
the Log menu.
Log Menu
Menu Button
Page 9
First, use the “Page Up” and “Page Down” buttons to view the first scan that interests you. Click the Palm’s Menu
button and pull down the Log menu. Click on Mark Begin.
Then, use the “Page Down” button to go to the last scan you want to look at. Click the Palm’s Menu button to pull
up the Log menu again, and click on “Mark End.”
Now, use the “Page Up” and “Page Down” buttons (or the “Prev” and “Next” buttons on the screen) to go back to
the beginning of the log. Notice how it won’t let you go past that first record that you marked. It also won’t let you
go forward past the ending record that you marked.
To clear the marks & enable viewing of all the scans again, click the Palm’s Menu button & pull down the Log
menu. Click on “Clear Marks” to clear the marks from the log display.
Saving & Restoring Logs
You can save your log data in an internal database using the Log Menu, and clicking Save Log, or clicking the
“Save” button on the Nanny screen. That will bring up this screen:
Date/time
current log was
started
Parameter &
scan count for
current log data
Save Button
List of
previously
saved logs
Custom
description
Under “Current Log” at the top, you will see information about the current data that you just logged. This particular
log was started on 2/23/04 at 6:49am. Ten parameters were logged, and 32 scans were captured. The number of
scans will be total scans logged, or just the ones you marked with “Mark Begin” and “Mark End”.
Below the scan count, is the word “Desc”. This is where you can enter a custom description for the log that you’re
about to save. This portion of the screen reacts to the “Graffiti” area of the Palm. For more information about using
the graffiti feature, see Chapter 2 of the Palm Handbook. Another alternative is to click the ABC section of the
Palm & use the on-screen keyboard.
Page 10
Click “Done” to
return to Log
Save screen
“ABC” Button
Click for onscreen keyboard
After you’ve entered a suitable description, click the “Save” button to save the current log data. You can see a list
of logs that are already saved on the Palm. Click one to highlight it, then use the “Delete” button to delete it, or the
“Restore” button to restore it for viewing. You can also click the “Delete All” button to erase all previously saved
logs.
Exporting Logs to the PC
Once logs have been saved on the Palm, you can export them to files on your PC during a hot-synch operation. This
requires that Palm Desktop 4.1 and the LS1M Synchronizer are both installed on your computer. See the section
below on Palm Desktop for installation instructions.
If both Palm Desktop 4.1 and LS1M Synchronizer are installed, you will see this window appear when you hotsynch:
Click the “Search” button to search the Palm for saved LS1M logs. Use the “Save…”, “Delete…” or “Delete All…”
buttons to save the log as a text file or delete one or all of the logs from the Palm memory. Files can be saved in
either comma-separated value format (for import into Excel) or EFILive-compatible log file format. (EFILive is a
data analysis scan-tool that runs under Windows. The program itself, minus the cable, is a free download from
www.starrperformance.com.au)
Page 11
Sample Pages
The first six pages are pre-configured with scan parameters. Any of these can be customized; they are just a good
starting point.
The first page is filled
with some of the most
common, basic engine
parameters, from
temperatures & ignition
advance, to fuel trims &
O2 sensor values.
The second page is
configured for just
ignition voltage. This can
be useful to determine the
state of health of your
battery. Turn the key on,
start scanning this page,
then start the car. Then
click the “Info” button to
see the minimum voltage
that occurred while
cranking the engine over.
If it’s less than 9.5V, your
battery may be on its way
out.
This page shows how
injector duty cycle is
monitored. First you
configure RPM and the
injector pulse width, then
the IDC1 parameter
calculates the duty cycle.
You can use IDC1 &
IDC2 to see if your fuel
injectors are being overworked. Scan this page &
do a wide-open-throttle
run, then click the “Info”
button to see how high
your duty cycle went. If
it’s over 90%, your
injectors may need
upgrading.
Page 12
Page 4 contains some
fuel-specific parameters.
FTC is the fuel trim cell
number, followed by O2
voltages, short & longterm fuel trims, and
closed-loop status.
Page 5 has some of the
diagnostic parameters.
MAF and MAFF show
mass air flow sensor
output. MISP and MISR
are used for misfire
diagnosis. MAP shows
the manifold air pressure,
while IAC shows the idle
air controller position in
counts, and TPSV shows
the throttle position switch
output in volts.
The final sample page is
an example of how you
might diagnose engine
knock (pinging). You can
log these parameters and
determine under what
conditions – speed, rpm,
throttle position – the
knock retard (KR) is
occurring.
Page 13
Customizing a Page
All 10 pages can be customized to include any parameters you want. You do this by clicking the down-arrow to the
left of a parameter, and selecting the one you want in that position from a list. The list shows all OBD2 standard
parameters first, in alphabetical order, followed by “----“, then all the enhanced parameters. Selecting “----“ will
disable scanning for that part of the page (no parameter).
Down Arrow
Parameter List
No Parameter
Selected
Description
Cancel Button
A short description of the parameter appears at the bottom of the screen after you select the parameter. Click the
“Cancel” button to abort the change. Otherwise, the parameter you select will be stored in the Palm in non-volatile
memory until you change it again.
A list of all the parameters and their meanings is in the Appendix.
Gauge
To go to the Gauge screen, click the Palm’s “Menu” button & then click “Gauge”, or click the “Gauge” button on
the main menu. The Nanny and Gauge screens are located under the “Scan” menu pull-down as shown below:
Gauge
Menu Button
Page 14
You can always use this method to switch from one screen to another, or back to the main menu by clicking
“Home”.
The Gauge screen is useful for monitoring one parameter at a time while driving. The font size is much bigger than
the Nanny screen. When you first start up the Gauge screen, it’s idle. To start scanning, just press the “Page Up” or
“Page Down” buttons to start scanning.
Status
Parameter
Units
Current
Value
Average
Value
Min Value
Max
Value
Page Up
Page Down
The parameter that displays will be listed on the screen, along with the current value, units, and min/max/avg values.
Keep pressing “Page Up” or “Page Down” to change the parameter. They will cycle through the standard
parameters alphabetically first, then you’ll see the “----“ parameter (no scan), then it’ll cycle through the enhanced
parameters, just like the drop-downs on the Nanny screen. If a parameter is not supported by your vehicle, then the
current/min/max/avg numbers will not be displayed (you’ll see three empty boxes instead).
You can also monitor up to 3 other parameters on the lower part of the screen. Click the down arrow to display a list
of choices, then click on the parameter you want.
Down Arrow
No Parameter
Selected
Description
Parameter List
Cancel Button
Click the parameter you’d like to view from the list, or click the cancel button to make the list go away. Scanning
will resume automatically.
Also notice the Save, Restore & Clear buttons. Use the Save button to save your configuration to non-volatile
memory. Use the Restore button to restore that saved configuration. Use the Clear button to clear the screen.
Page 15
Trouble Codes
To go to the Trouble Codes screen, click the Palm’s “Menu” button & then click “Test”, then “TCodes”, or click the
“Trouble Codes” button on the main menu.
TCodes
Menu Button
Update Button
Reset SES
Button
Trouble
codes list
Page Up
Page Down
To check the trouble codes on the car, click the “Update” button or press the “Page Up” button. The trouble codes,
if any, will be listed in the bottom part of the screen. A short description will follow the code number. Click the
code in the list to see a full description.
To reset the SES (service engine soon) light, click the “Reset SES” button or press the “Page Down” button.
Page 16
0-60 Test
Status
Start/Stop
Speeds
Start Button
Total time
Estimated
HP
Max scan time
Config Button
Vehicle
weight
Page Up
To use this screen, first come to a complete stop on an empty section of road (or track). Click the “Start” button or
press the “Page Up” button. The scanner will then start monitoring MPH until it senses vehicle movement; you do
not need to start moving immediately. When you’re ready, accelerate to 60mph. As soon as the car starts moving,
you will hear a little beep (unless you’ve turned system sounds & alarm sounds off via the PREFS icon on the
Palm). There will be another sound when you reach 60mph. The scanner will calculate the time it takes you to get
to 60mph, and based on your vehicle weight, will do a quick calculation of estimated effective (wheel) horsepower.
In the sample above, it took 4.5 0-60mph, which requires an average of 340hp for a 3500lb car. The maximum
amount of time it took the computer to respond to a MPH request was 55 milliseconds, so the 0-60mph time was 4.5
seconds, plus or minus 0.055 seconds.
Use the drop-down arrows to configure the test to another range like 20-70mph or 40-60mph. Click the Config
button to change your vehicle weight.
To repeat the test, just stop the car, click “Start” or press “Page Up”, and do it again. Remember, you don’t have to
go immediately; the scanner won’t start the timer until the car starts moving.
Page 17
LTrims
Results Button
Cell Data
Sample Count
Start Button
Reset Button
Overall
Average
Page Up
Page Down
This screen is used to collect the LTRIM’s. These are the amounts by which the computer has increased or
decreased the amount of fuel delivered under different conditions, in order to maintain a perfect 14.7:1 air/fuel ratio,
as seen by the O2 sensors. Each set of conditions is called a “cell”. Cell 16, for instance, seems to be used when the
car is idling.
To collect the LTrims, click the “Start” button or press “Page Up”. The number of sample values at the bottom of
the screen will increment each time the scanner successfully determines what cell the car is in and what the left and
right (driver’s and passenger’s side) LTrims are. Samples where the cell number changes (during rapid change of
engine load and/or RPM) are discarded. To view the results, click the “Results” button or press “Page Up” again.
The overall average of all cells will be listed at the bottom of the page (the driver’s side is listed first, then the
passenger side). To continue collecting (collection stops when results are displayed), click the “Start” button again
or press “Page Up”. To reset the list & start over, click the “Reset” button or press “Page Down”.
Software Upgrades
Updates to the LS1M software are free for the life of the scanner. Information on revisions will be available on the
LS1M web site or via email announcements. Currently, the web page location is:
http://www.LS1M.com
The LS1M program, like all Palm programs, consists of one file (LS1M.PRC). This program is installed just any
other 3rd-party software; with the Palm Desktop.
Installing Palm Desktop
Palm Desktop software for Windows or Macintosh is available as a free download from the Palm website:
http://www.palm.com/software/desktop
The Windows version 4.1 is also available on the LS1M CD. To install it, navigate to the CD drive in the “Palm
Desktop Software” directory and run the install program “PalmDesktop41ENG”. Follow the on-screen instructions
to install Palm Desktop on your computer.
Page 18
Select “Complete Installation”
Create a new user named “LS1M”
Select “Serial Port” and pick an available COM port (a USB port won’t work)
Page 19
Installing LS1M Synchronizer
To enable you to save logs to text files on the PC, you must install LS1M Synchronizer. First install Palm Desktop
as described above. If you already have Palm Desktop installed, verify it’s version 4.1 or better (select to Help>About Palm Desktop). Be sure to reboot the PC after installing Palm Desktop.
Then insert the LS1M CD and find the file “PalmCOMInstaller” in the “LS1M Synchronizer” folder. Double-click
on this file to install COM support (a programming interface that is needed by the synchronizer program). Reboot
the PC.
Now find the file “Setup.exe” in the “LS1M Synchronizer” folder. Double-click on “Setup.exe” to launch the
installer. You will see a dialog box “Copying Files – Please Stand By” and then this one:
Click the “OK” button. Then you will see this:
Click the “Change Directory” button if you want to install in a different directory. Otherwise, click the large square
button. After a few seconds, you’ll see a dialog box telling you the installation was successful. Click “OK”. After
that, the “LS1MSynchDllInstaller” program will start to run. It may present you with this dialog box:
If you see this, click “OK” and then select the directory you specified when you installed Palm Desktop from the
directory tree:
Select the correct folder and click “OK”.
A few seconds later, you should see a dialog box informing you that the conduit was successfully registered:
Page 20
Hot-Synching
Hot-Synching is term applied to connecting the Palm PDA to the computer, through the serial port, and
synchronizing data between the two. First, insert the hotsynch cable into the palm, then plug the other end into the
COM port in the back of the computer.
To hot-synch, start the Palm Desktop, then press the button on the hotsynch cable.
Installing LS1M
To install LS1M on your Palm PDA, either after a hard reset (see “Resetting to Factory Defaults” below) or after
receiving an update, start the Palm Desktop program. Click the “Install” icon on the left side of the screen.
Page 21
Click the “Add…” button & navigate to the directory where the new LS1M.PRC is. (The version that was installed
when the scanner was shipped, is on the LS1M CD in the “LS1M Program” folder.) Select the file LS1M.PRC and
click “Done”. Now, the next time a hot-synch is performed, the new version of LS1M will be installed. To verify
this, start LS1M and note the version number at the bottom of the screen. (Go to the main menu & click “About
LS1M” to view the startup screen again.)
Palm Maintenance
There really isn’t any routine maintenance for a small computer like the Palm, except changing the batteries. The
only other time it may need attention is if the screen goes out of calibration or it seems to be acting strangely.
Changing the Batteries
The first thing you should do if your Palm is not working right, or doesn’t seem to be, is change the batteries. This
is a simple matter of removing the back cover & installing some fresh AAA batteries. (Rechargeable NiMH
batteries should also work fine.) Please note, however, that if you are using your Palm for other things, like keeping
contact lists or a calendar, when you change the batteries, all your data may be lost. It is important to do a hot-synch
prior to changing the batteries. After the new batteries are in, do another hot-synch to put all your data back on the
Palm.
Adjusting the contrast
To adjust the contrast, turn on the Palm & click the
icon in the Graffiti area of the Palm
Contrast
Button
Use the slider to
adjust the contrast
Page 22
Re-Calibrating the Touch Pad
To re-calibrate the touch screen, you need to run the “Welcome” program. Find the
icon & click it. It’ll
ask you to click on a few targets & then give you a chance to set the date & time. After that, you can click the
“Basic Skills…” button at the bottom of the screen for a brief tutorial, or click “Done”.
Troubleshooting
Can’t find OBD2 cable
If you get the message “Can’t find OBD2 cable”, then that means LS1M can’t communicate with the OBD2 cable.
Verify all connections, and that the car is running or key is in the “run” position. If that doesn’t fix the problem,
then check your car’s fuses. The OBD2 port is usually powered by the cigarette lighter or accessories fuse. If you
have a voltmeter, check for 12 volts between pins 4 & 16 (pins are numbered 1-8 across the top of the connector, 916 across the bottom, left to right). If you’ve got voltage, the cables are hooked up right, and it still won’t work,
perform a hard reset (below) and re-install LS1M on the Palm.
Conduit registration error
If you’re getting an error “Failed to register conduit” or something similar when trying to install the LS1M
Synchronizer, be sure you’re following the steps below. Usually, this is caused by failing to reboot between steps.
1.
Install Palm Desktop 4.1 or newer (file PalmDesktop41ENG.exe from the CD).
Reboot the PC.
2.
Install Palm COM support (file PalmCOMInstaller.exe from the CD).
Reboot the PC.
3.
Install the LS1MSynchronizer (file setup.exe from the LS1M Synchronizer folder on the CD).
Resetting the Palm
To perform a reset on the palm (the equivalent of a shutdown & restart on a PC), use a small pointed object such as a
paper clip, and gently insert it into the hole labeled “Reset” on the back of the Palm until you feel a slight click.
This will cause all programs to terminate and the Palm will start up again. No data will be lost by doing this.
Page 23
Resetting the Palm to Factory Defaults
To restore the Palm back to factory defaults (and erase all programs & data except for those that came with it), hold
the power button down while pressing something into the “Reset” hole. After you see the “Palm” emblem come up
on the screen, release the power button. Press the “Page Up” button to confirm.
Page Up
You can perform a hot-synch operation to restore your programs & data, including the LS1M program (see above).
More Information
More information on the Palm is available from the Palm web site
http://www.palm.com
You may also view some documentation on the LS1M CD, in the “Palm Docs” folder. There are two files there: a
Getting Started guide and a Handbook for the PDA. You will need to install the Adobe Acrobat reader, if you
computer doesn’t already have it, to view these files. Adobe Acrobat reader is a free program available from Adobe
at:
http://www.adobe.com/products/acrobat/readstep.html
or you can install it from the “Adobe Acrobat Reader” folder on the LS1M CD.
Check the LS1M web site occasionally for new versions of the program:
http://www.LS1M.com
Page 24
Appendix
Scan Parameters
Please note that not every vehicle will support every parameter. For example, most V6-equipped
vehicles do not have a passenger-side O2 sensor; therefore, codes such as LFT2 & O2R will return
“T.O.” (timeout).
Standard OBD2 Parameters: (supported by all compatible vehicles except as stated above)
Description
Tyical Value
Parameter
B
CLSD
Boost (L67 only)
Closed-loop status
ECT
IAT
Engine coolant temperature
Intake air temperature
IGN
Ignition advance
LD
LFT1
LFT2
Engine load (calculated by
the vehicle’s computer)
Long-term fuel trim, driver’s
side & passenger side
MAF
Mass air flow
MAP
Manifold air pressure
MPH
O2L
O2R
RPM
Vehicle speed
Oxygen sensor, driver’s side
Oxygen sensor, passenger
side
Engine speed
SFT1
SFT2
Short-term fuel trim, driver’s
side & passenger side
0 to 10 PSI at wide-open throttle
0 (open loop) when cold
1 (closed loop) after engine warms
up
185-220 deg F
30-110 deg F or more, depending
on the weather
Varies: 15-20 degrees at idle, 2030 at full throttle
0-100%, depending on conditions.
2 or 3% or so at idle.
-10 to +10%
Zero after battery change or
vehicle computer reset
From 0.5-1 lb/min at idle to 30-35
at full throttle
9-10”Hg at idle to near 30 at full
throttle
Should match speedometer
Should move around a lot after
engine warms up; 850mV to 950mV
at full throttle
600-700 at warm idle, up to 6000
or more during shifts at full
throttle
-10 to +10%
Zero after battery change or
vehicle computer reset
Page 25
Enhanced parameters are additional data that can be scanned from most late-model GM vehicles. The
LS1 supports all of these except for KC. The L67 supports everything except IDC2 & IPW2.
Enhanced GM Parameters: (may not apply to all vehicles)
Description
Tyical Value
Parameter
FTC
Fuel trim cell
IAC
Idle air counts
IDC1
IDC2
IGNV
Injector duty cycle, driver’s
side & passenger side
Ignition volts
IPW1
IPW2
KC
Injector pulse width
Knock Count
KR
Knock retard
MAFF
Mass air flow frequency
MISP
MISR
Primary misfiring cylinder
Revolutions with misfires
TFT
Transmission Fluid
Temperature
TPSV
Throttle position sensor
voltage
Varies with engine conditions. In
general, numbers go up with load,
except for cells 20-22, which may
be used for open loop (including
full throttle)
20-60 at warm idle to 100 while
cruising; higher when a/c is on
1-2% at idle, up to 85% at full
throttle
12 volts or so with key on, down
to 9.5-9.8 during starting, then
13.5-14.5 with engine running
2-4 milliseconds up to 15-20 at
higher rpm’s and full throttle
Zero to several dozen
Ideally, should always be zero
Zero to 3-4 degrees
Ideally, should always be zero
2200-2300 at idle, 9000+ at full
throttle
1-8 if misfires present
0-10 revs is common; more than
that may indicate problem
Ambient to 200 deg F or so.
Above 225 and the tranny fluid
starts to deteriorate.
0-5Volts; typically 0.5 volts at idle
& 4.5 at full throttle
Licensing Agreement
As a purchaser of the LS1M scanner, you MAY:
•
Use the scanner on as many different vehicles as you want.
•
Loan the scanner to a friend to use.
•
Sell the scanner. (The new owner will also be bound by the terms of this licensing agreement.)
•
Make a backup copy of the program.
You may NOT:
•
Give a copy of the program to anyone else. If someone wants a copy, direct him/her to the web site where
he/she can download the demo version.
•
Reverse-engineer the program or the OBD-2 interface cable.
•
Modify the program or the OBD-2 interface cable.
•
Export the program or the OBD-2 interface cable to any country which is under a trade embargo with the
US Government.
Page 26