Appendix A – PID Definitions
Appendix B – Data Link Connectors
Appendix C – Glossary
iv
Safety Precautions
For your safety, read this manual thoroughly before operating your
Scan Tool. Always refer to and follow safety messages and test
procedures provided by the manufacturer of the vehicle or eq uipment
being tested.
The safety messages presented below and throughout this user’s
manual are reminders to the operator to exercise extreme care when
using this test instrument.
Read All Instructions
Read, understand and follow all safety messages and instructions in
this manual and on the test equipment. Safety messages in this section
of the manual contain a signal wor d with a three-p art message and, in
some instances, an icon.
Safety Messages
Safety messages are provided to help prevent personal injury and
equipment damage. All safety messages are introduced by a signal
word. The signal word indicates the level of the hazard in a situation.
The types of safety messages are.
Indicates a possible hazardous situation which, if not
avoided, will result in death or serious injury to
operator or bystanders.
Indicates a possible hazardous situation which, if not
avoided, could result in death or serious injury to
operator or bystanders.
Indicates a possible hazardous situation which, if not
avoided, may result in moderate or minor injury to
operator or bystanders.
Indicates a condition which, if not avoided, may result
in damage to test equipment or vehicle.
Safety Precautions
!
Type Styles Used:
Safety messages contain three different type styles.
• Normal type states the hazard.
• Bold type states how to avoid the hazard.
• Italic type states the possible consequences of not avoiding the
hazard.
Icons used:
An icon, when present, gives a graphical description of a po te nt ial
hazard.
Example:
Engine systems can malfunction expelling fuel, oil
vapors, hot steam, hot toxic exhaust gases, acid,
refrigerant and other debris.
Safety goggles and protective gloves must be worn
by the operator and any byst anders. Even if everyday
eyeglasses have impact resistant lenses, they are
NOT safety glasses.
•Avoid making an ac cidental connection between the
battery terminals. Do not place uninsulated metal
tools on the battery.
•When removing battery cables, remove the ground
cable first.
•Avoid sparks when connecting or disconnecting
power leads to the battery.
•Make sure ignition is off, headlights and other
accessories are off and vehicle doors are closed
before disconnecting the battery cables.
-
This also helps prevent damage to on-board computer systems.
•Always disconnect the battery ground connections
before servicing electrical system components.
Explosion can cause injury.
Risk of poisoning.
•Use this Scan Tool in locations with mechanical
ventilation providing at least 4 air changes per hour .
Engine exhaust contains odorless gas which can be
lethal.
•Route the exhaust outside wh ile testing with the
engine running.
•Block drive wheels before performing a test with
engine running.
•Unless instructed otherwise:
- set parking brake
- put gear selector in neutral for manual transmissions
- put gear selector in park for automatic transmissions
- disconnect release mechanism on the automatic
parking brake release for testing and reconnect when
testing is completed.
• Do not leave a running engine unattended.
A moving vehicle can cause injury.
Risk of equipment or circuit damage.
•Unless specifically directed by manufacturer, make
sure ignition is off before connecting or
disconnecting connectors or any vehicle electrical
terminals.
•Do not create a short between batter y terminals with
a jumper wire or tools.
Improper equipment use can cause equipme nt or circu it
damage.
Misdiagnosis may lead to incorrect or improper repair
and/or adjustment.
•Do not rely on erratic, questionable, or obviously
erroneous test information or results.
- If test information or results are erratic, questionable,
or obviously erroneous, make sure all connections
and data entry information are correct and test
procedures were performed correctly.
- If test information or results are still suspicious, do
not use them for diagnosis.
Improper repair and/or adjustment may cause vehicle o r
equipment damage or unsafe operation.
Some vehicles are equipped with air bags.
•Follow service manual warnings when working
around air bag components or wiring.
- If service manual instructions are not followed, an air
bag may deploy unexpectedly, resulting in injury.
- Note an air bag can still deploy several minutes after
ignition key is off (or even if vehicle battery is
disconnected) because of a special energy reserve
module.
This manual contains instructions for the use and setup of your Scan T ool. A
table of contents and glossary are provided to make this manual easy to use.
Some of the information shown in text or illustrations is obtained using optional
equipment. A Sales Representative can determine option availability.
This section contains a list of conventions used.
Safety Messages
Refer to Safety Precautions on page Safety - i.
Check Note
A check note provides additional information about the subject in the preceding
paragraph.
Example:
✓ English is the default measurement unit.
Equipment Tips and Lists
Equipment tips and lists provide information that applies to specific equipment.
Each tip is introduced by this icon
Example:
❒ Observe all vehicle and/or equipment manufacturer’s cautions and
warnings when testing with the Sca n Tool.
❒ for easy identification.
1
Equipment Damage
Situations arise during testing that could damage the vehicle or the test
equipment. The word IMPORTANT signals these situations.
Failure to follow these instructions could damage the Scan Tool.
Using This Manual
Functions and Selections
Diagnostic and tool functions performed by the Scan Tool are highlighted in
bold.
Example:
The View Data function allows you to view the vehicle’s parameter identification
(PID) data in real time.
1
Menus
The menus on the Scan T ool display are referenced in the procedures and are
highlighted in bold-italic text.
Example:
When the OBDII Function List menu displays, the Scan Tool is ready for use.
Questions and Responses
Messages and user responses are CAPITALIZED.
Example:
The Scan Tool displays the pending DTCs or a message stating SYSTEM PASS: NO FAULT DETECTED.
Manual References
Used to reference other sections of the manual. References include the Title
and page number (section-page).
Example:
For more information on DTCs, refer to “OBD II Diagnostic Trouble Codes
(DTCs)” on page 2-15
Screens
Certain help messages, information, and data that are displayed on the scan
tool are also shown in graphical text boxes. The screens are presented as
examples and may change as the software is updated.
Example:
Main Menu
Global OBD II
Domestic Vehicles
European Vehicles
Asian Vehicles
Review Data
Print Data
System Setup
The Scan Tool was developed by experts in the automotive service
industry to help diagnose vehicles and assist in troubleshooting
procedures.
The Scan Tool monitors vehicle events and retrieves codes from the
vehicle’s control modules to help pinpoint problem areas.
All information, illustrations and specifications contained in this manual
are based on the latest information available from industr y so urces a t
the time of publication.
No warranty (expressed or implied) can be made for its accuracy or
completeness, nor is any responsibility assumed by the manufacturer
or anyone connected with it for loss or damages suffered through
reliance on any information contained in this manual or misuse of
accompanying product. The manufacturer reserves the right to make
changes at any time to this manual or accompanying product without
obligation to notify any person or organization of such changes.
✓ T o be able to use the included CD the PC must meet the following
minimum requirements:
❒ 486 PC
❒ 4 MB of RAM
❒ Microsoft Windows 98 SE, ME, 2000, and XP
❒ CD ROM Drive
❒ Adobe Acrobat Reader
❒ Internet Explorer 4.0 or newer
❒ Screen Resolution of 800 x 600
– If screen resolution is 800 x 600, in Display Properties, Settings
Diagnostic Service Manuals
PowerTrain Codes and Oxygen Sensors
Automotive Emission Control Manual
Fuel Injection
Automotive Electrical Manual
Automotive Electrics and Electronics
Automotive Sensors
Electronic Transmission Control
Emission Control Technology
Engine Management
or similar titles...
The original on-board diagnostics (OBD I) lacked consistency in
communication and interface while allowing different interpretations
among vehicle manufacturers. Ford and Chrysler used different types
of engine control computers and data link connectors ( DLCs), and GM
varied the trouble codes and communication protocols from
year-to-year.
OBD II
2
On-board diagnostics version II (OBD II) is a system that the Society of
Automotive Engineers (SAE) developed to standardize automotive
electronic diagnosis.
Beginning in 1996, most new vehicles sold in the United States were
fully OBD II compliant.
✓ Technicians can now use the same tool to test any OBD II
compliant vehicle without special adapters. SAE established
guidelines that provide:
❒ A universal connector, called the DLC, with dedicated pin
assignments.
❒ A standard location for the DLC, visible under the dash on driver’s
side.
❒ A standard list of diagnostic trouble codes (DTCs) used by all
manufacturers.
❒ A standard list of parameter identification (PID) data used by all
manufacturers.
❒ Ability for vehicle systems to record operating conditions when a
fault occurs.
❒ Expanded diagnostic capabilities that records a code whenever a
condition occurs that affects vehicle emissions.
❒ Ability to clear stored codes from the vehicle’s memory with a
SAE has published hundreds of pages of text defining a standard
communication protocol that establishes hardware, software, and
circuit parameters of OBD II systems. Unfortunately, vehicle
manufacturers have different interpret ations of this standard
communications protocol. As a result, the generic OBD II
communications scheme varies, depending on the vehicle. SAE
publishes recommendations, not laws, but the Environmental
Protection Agency (EP A) a nd California Air Resources Bo ard (CARB)
made many of SAE’s recommendations legal requirements that vehicle
manufacturers were required to phase in over a three-year period.
Beginning in 1994, vehicles with a new engine management comp uter
( about 10% of each manufacturers fleet ) were supposed to comply
with OBD II standards. For 1995, OBD II systems were to appear on
about 40% of the new vehicles sold in the United S tates. Some of the
1994-1995 OBD II systems were not fully compliant, so th e Government
granted waivers to give manufacturers time to fine-tune their systems.
Beginning in 1996, most of the new vehicles sold in the United States
were fully OBD II compliant.
The tables below highlight changes for GM, Ford , and Chrysler. If this
seems confusing, don’t worry . The Scan Tool makes it easy . Ba sed on
the vehicle identification (VIN) information selected during Scan Tool
setup, the vehicle is automatically recognized. All you have to do is
choose the correct adapter cable and jumper wires (if necessary).
Details on adapter cables and jumper wires may be found in Data LInk
Connector on page 2-9
2
.
GM On-Board Diagnostics
SystemYearsDescription
Most vehicles used the 12-pin ALDL (A ssembly Line Data Link)
OBD I Control Module
OBD II Control Module
*
OBD II system is used on certain 1994 -1995 vehicles equ ipped w ith a 2.2L, 2.3L, 3 .8L, 4.3L or 5.7L
1994*-Present Complies with OBD II regulations and uses the J1962 DLC.
located under the dash on the driver side. Some 94-95 vehicles
used the 16-pin OBD II (J196 2) da ta link co nnector (DLC) , but
use the Historical application software. Refer to the vehicle’s
Vehicle Emission Control Information label.
Getting Started
Ford On-Board Diagnostics
SystemLong NameYearsDescription
MCU
Microprocessor Control Unit 1980 –1991
EEC-IV
2
* EEC-V OBD II system used in 1994-1995 vehicles equipped with a 3.8L or 4.6L engine.
The data link connector (DLC) allows the Scan Tool to communicate
with the vehicle’s computer(s). Before OBD II, manufacturers used
different DLC’s to communicate with the vehicle. use the proper DLC
adapter cable to connect the Scan T ool to the vehicle. Also, the vehicle’s
DLC may be found in several different places and have many dif ferent
configurations. The following describes the DLCs used by Ford, GM
and Chrysler . The DLC location and types for domestic vehicles can be
looked up in the charts in Appendix B - Data Link Connectors.
OBD II (J1962)
Beginning in 1996, vehicles sold in the United States use the J1962
(OBD II) DLC, a term taken from a physical and electrical specification
number assigned by the SAE (J1962). The DLC should be located
under the dashboard on the driver’s side of the vehicle. If the DLC is not
located under the dashboard as state d, a decal de scribing it s locatio n
should be attached to the dashboard in the ar ea the DLC should have
been located.
Because the OBD II J1962 connector has power and ground, you only
need a single cable connection to the tool for both power and tool
communications. Attach the OBD II adapter cable to the extender cable,
(both supplied with the tool) to connect the tool. Certain pins in the
connector are reserved.
13 - Manufacturer Reserved
14 - CAN Low, J-2284
15 - L Line, ISO 9141-2 & ISO/DIS 14230-4
16 - Battery Power
8
16
Ford used three types of DLCs with their OBD I systems. Refer to
Appendix B - Data Lin k Connectors for the adapter cable needed for
your vehicle.
Use the cigarette lighter cable to provide power to the
Scan Tool for all systems.
The EEC-IV/MCU DLC is a large six-sided connector with a pigtail
connector . The pigt ail conne ctor is not used on MCU vehicles – leave
the pigtail unattached. The EEC-IV/MCU cable adapter is included with
the Scan Tool.
MECS vehicles (1988 –1995) use either a 6-pin (with pigtail) or a 17-pin
DLC. Use the MECS 6-pin adapter cable kit (CP9131) for both
configurations. The MECS adapter cable kit includes jumper wires to
connect to the MECS 17-pin DLC. The MECS adapter cable kit is
optional and must be purchased separate ly. Use the following diagrams
to connect the adapter cable.
Certain Ford Probes have a WHITE TACH
CONNECTOR located very close to the 6-pin
self-test connector and bundled in the same wiring
harness. This is not the self-test input (STI) pigtail.
6-Pin MECS
P/N CP9131
4
1
STI Pigtail
6
5
3
2
Clip to good
vehicle ground
Vehicle DLC
17-Pin MECS
STO
Connect the pigtail to the BLACK STI connector located fa rther back on
the wire harness. If the tool is connected to the WHITE tach connector ,
serious damage may result and may void warranty. Refer to the
illustration.