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INDEX
1．Safety Precautions and Warnings........................................ 3
2. General Information.....................................................5
2.1 On-Board Diagnostics (OBD) II....................................... 5
2.2 Diagnostic Trouble Codes (DTCs)................................... 6
2.3 Location of the Data Link Connector (DLC)............... 7
2.4 OBD II Readiness Monitors............................................... 8
2.5 OBD II Monitor Readiness Statuses............................. 10
2.6 OBD II Definitions........................................................... 11
3. Using the Scan Tool.............................................................. 14
3.1 Tool Description............................................................... 14
3.2 Specifications................................................................... 15
3.3 Accessories Include......................................................... 15
3.4 Product Troubleshooting................................................. 15
4. Software Function.................................................................. 17
4.1 System Configuration....................................................... 18
4.2 DTC LOOKUP........................................................................... 21
5. OBD II Diagnostics................................................................ 23
5.1 Read Trouble Code............................................................. 24
5.2 Erase Trouble Codes......................................................... 26
5.3 Read DataStream................................................................. 28
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5.4 Component test................................................................... 30
5.5 Freeze Frame Data............................................................. 31
5.6 O2 Sensor Monitoring Test............................................. 32
5.7 Vehicle Information......................................................... 34
6．Software update...................................................................... 36
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1．Safety Precautions and Warnings
To prevent personal injury or damage to vehicles
and/or the scan tool. Read this instruction
manual first and observe the following safety
precautions at a minimum whenever working on a
vehicle.
·Always perform automotive testing in a safe
environment.
·Wear safety eye protection that meets ANSI
standards.
· Keep clothing, hair, hands, tools, test
equipment, etc. Away from all moving or hot
engine parts.
·Operate the vehicle in a well ventilated work
area: Exhaust gases are poisonous.
·Put blocks in front of the drive wheels and
never leave the vehicle unattended while
running tests.
·Use extreme caution when working around the
ignition coil, distributor cap, ignition
wires and spark plugs. Theses components
create hazardous voltages when the engine is
running.
·NEUTRAL (for manual transmission) and make
sure the sparking brake is engaged.
· Keep a fire extinguisher suitable for
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gasoline/chemical/electrical fires nearby.
· Don’t connect or disconnect any test
equipment while the ignition is on or the
engine is running.
· Keep the scan tool dry, clean, free from
oil/water or grease. Use a mild detergent on
a clean cloth to clean the outside of the scan
tool, when necessary.
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2. General Information
2.1 On-Board Diagnostics (OBD) II
The first generation of On-Board Diagnostics
(called OBD I) was developed by the California
Air Resources Board (ARB) and implemented in
1988 to monitor some of the emission control
components on vehicles. As technology evolved
and the desire to improve the On-Board
Diagnostics system increased. A new generation
of On-Broad Diagnostic system was developed.
This second generation of On-Broad Diagnostic
regulations is called “OBD II”
The OBD II system is designed to monitor
emission control systems and key engine
components by performing either continuous or
periodic tests of specific components and
vehicle conditions. When a problem is detected,
the OBD II system turns on a warning lamp (MIL)
on the vehicle instrument panel to alert the
driver typically by the phrase of “Check
Engine” or “Service Engine Soon”. The system
will also store important information about the
detected malfunction so that a technician can
accurately find and fix the problem. Here below
follow three pieces of such valuable
information:
1) Whether the Malfunction Indicator Light (MIL)
is commanded ‘on ‘or ‘off’;
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2) Which, if any, Diagnostic Trouble Codes
(DTCs) are stored;
3) Readiness Monitor status.
2.2 Diagnostic Trouble Codes (DTCs)
OBD II Diagnostic Trouble Codes are codes that
are stored by the on-board computer diagnostic
system in response to a problem found in the
vehicle. These codes identify a particular
problem area and are intended to provide you
with a guide as to where a fault might be
occurring within a vehicle. OBD II Diagnostic
Trouble Codes consist of a five-digit
alphanumeric code. The first character, a
letter, identifies which control system sets
the code. The other four characters, all
numbers, provide additional information on
where the DTC originated and the operating
conditions that caused it to set. Here below
is an example to illustrate the structure of
the digits:
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2.3 Location of the Data Link Connector (DLC)
The DLC (Data Link Connector or Diagnostic
Link Connecter) is the standardized 16-cavity
connector where diagnostic scan tools
interface is 12 inches from the center of
instrument panel (dash), under or around the
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driver’s side for most vehicles. If Data Link
Connector is not located under dashboard, a
label should be there telling location. For
some Asian and European vehicles, the DLC is
located behind the ashtray and the ashtray
must be removed to access the connector, if the
DLC cannot be found, refer to the vehicle’s
service manual for the location.
2.4 OBD II Readiness Monitors
An important part of a vehicle’s OBDII system
the Readiness Monitors, which are indicators
used to find out if all of the emissions
components have been evaluated by the OBD II
system. They are running periodic tests on
specific systems and components to ensure
that they are performing within allowable
limits.
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Currently, there are eleven OBD II Readiness
Monitors (or/ I/M Monitors) defined by the U.S.
Environmental Protection Agency (EPA). Not
all monitors are supported by all vehicles and
exact number of monitors in any vehicle
depends on the motor vehicle manufacturer’s
emissions control strategy.
Continuous Monitors – Some of the vehicle
components or systems are continuously tested
by the vehicle’s OBD II system, while others
are tested only under specific vehicle
operating conditions. The continuously
monitored components listed below are always
ready:
1) Misfire
2) Fuel System
3) Comprehensive Components (CCM)
Once the vehicle is running the OBD II system
is continuously checking the above components,
monitoring key engine sensors, watching for
engine misfire, and monitoring fuel demands.
Non-Continuous Monitors – Unlike the
continuous monitors, many emissions and engine
system components require the vehicle to be
operated under specific conditions before the
monitor is ready. These monitors are termed
non-continuous monitors and are listed below:
1) EGR System
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2) O2 Sensors
3) Catalyst
4) Evaporative System
5) O2 Sensor Heater
6) Secondary air
7) Heated Catalyst
8) A/C system
2.5 OBD II Monitor Readiness Statuses
OBD II systems must indicate whether or not
the vehicle’s PCM’s monitor system has
completed testing on each component.
Components that have been tested will be
reported as “Ready”, or “complete”,
meaning they have been tested by the OBD II
system. The purpose of recording readiness
states is to allow inspectors to determine if
vehicle’s OBD II system has tested all the
components and/or systems.
The power train control module (PCM) sets a
monitor to “Ready” or “Complete”, it will
remain in this state. A number of factors,
including erasing of diagnostic trouble codes
(DTCs) with a scan tool or a disconnected
battery, can result in Readiness Monitors
being set to “Not ready”. Since the three
continuous monitors are constantly
evaluating, they will be reported as
Indice
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