INSTRUCTIONS FOR:
EOBD CODE REaDER
MODEL No: VS8812
© Jack Sealey Limited
Original Language Version
VS8812 | Issue 1 27/02/17
InStructIonS for
IMPORTANT: PLEASE READ THESE INSTRUCTIONS CAREFULLY. NOTE THE SAFE OPERATIONAL REQUIREMENTS, WARNINGS & CAUTIONS. USE
THE PRODUCT CORRECTLY AND WITH CARE FOR THE PURPOSE FOR WHICH IT IS INTENDED. FAILURE TO DO SO MAY CAUSE DAMAGE AND/OR
PERSONAL INJURY AND WILL INVALIDATE THE WARRANTY. KEEP THESE INSTRUCTIONS SAFE FOR FUTURE USE.
EOBD CODE REaDER - LIVE DaTa
modeL no: VS8812
Thank you for purchasing a Sealey product. Manufactured to a high standard, this product will, if used according to these
instructions, and properly maintained, give you years of trouble free performance.
refer to
instructions
1. TaBLE OF CONTENTS
2. Safety Precautions and Warnings ....................................2
3. General Information.............................................................2
3.1 on-Board diagnostics eoBd ..........................................2
3.2 diagnostic trouble codes (dtcs) ..................................2
3.3 Location of the data Link connector (dLc) ....................2
3.4 eoBd readiness monitors ............................................3
3.5 eoBd monitor readiness Status ......................................3
3.6 EOBD Denitions ..............................................................3
3.7 eoBd modes of operation ..............................................3
4. using the Scan tool ............................................................4
4.1 tool description ..............................................................4
4.2 Specications .................................................................4
4.3 navigation characters ...................................................4
4.4 Keyboard ........................................................................4
4.5 Power supply..................................................................5
4.6 tool Setup ...................................................................5/6
4.7 About .................................................................................7
4.8 Vehicle coverage ............................................................7
4.9 Product troubleshooting ................................................7
5. eoBd diagnostics ............................................................7
5.1 read codes ...................................................................8
5.2 erase codes ..................................................................9
5.3 data Stream .................................................................10
5.4 View freeze frame ......................................................10
5.5 I/m readiness ..............................................................10
5.6 Vehicle Info ..................................................................11
5.7 exiting the eoBd test .....................................................11
6. I/m readiness ................................................................11
6.1 ready test mode .........................................................12
6.2 Scan tool mode ...........................................................13
Page 1
© Jack Sealey Limited
Original Language Version
VS8812 | Issue 1 27/02/17
Page 2
2. SaFETy
WaRNING! To prevent personal injury or damage to vehicles and/or the scan tool, read this instruction manual rst and observe the
following safety precautions.
9 Always perform automotive testing in a safe environment.
9 Wear safety eye protection.
9 Keep clothing, hair, hands, tools, test equipment, etc. away from all moving or hot engine parts.
9 operate the vehicle in a well ventilated work area. exhaust gases are poisonous.
9 Put blocks in front of the drive wheels and never leave the vehicle unattended while running tests.
9 use extreme caution when working around the ignition coil, distributor cap, ignition wires and spark plugs. these components
create hazardous voltages when the engine is running.
9 Put the transmission in PArK (for automatic transmission) or neutrAL (for manual transmission) and make sure the parking brake
is engaged.
9 Keep a re extinguisher suitable for petrol/chemical/electrical res nearby.
8 DO NOT connect or disconnect any test equipment while the ignition is on or the engine is running.
9 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.
3. GENERaL INFORMaTION
3.1. On-Board Diagnostics EOBD
the eoBd system is designed to monitor emission control systems and key engine components by performing either continuous or
periodic tests of specic components and vehicle conditions. When a problem is detected, the EOBD system turns on a warning lamp
on the vehicle instrument panel to alert the driver typically by the phrase of "check engine". the system will also store important
information about the detected malfunction so that a technician can accurately nd and x the problem.
3.2. Diagnostic Trouble Codes
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. eoBd Diagnostic Trouble Codes consist of a ve-digit alphanumeric code. The rst character,
a letter, identies 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 digits:
dtc example
Systems
B=Body
c=chassis
P=Powertrain
u=network
code type
Generic (SAE):Manufacturer Specic:
P0, P2, P34-P39 P1, P30-p33
B0, B3 B1, B2
c0, c3 c1, c2
u0, u3. u1, u2
3.3. Location of the Data Link Connector (DLC)
the dLc (data Link connector or diagnostic Link connector) is the standardized 16-cavity connector where diagnostic scan tools
interface with the vehicle's on-board computer. the dLc is usually located 30cm from the center of the instrument panel (dash),
under or around the driver's side for most vehicles. If data Link connector is not located under dashboard, a label should be there
telling the 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.
3.4. EOBD Readiness Monitors
An important part of a vehicle's EOBD system is the Readiness Monitors, which are indicators used to nd out if all of the emissions
components have been evaluated by the EOBD system. They are running periodic tests on specic systems and components to
ensure that they are performing within allowable limits.
not all monitors are supported by all vehicles and the 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 eoBd system, while
others are tested only under specic vehicle operating conditions. The continuously monitored components listed below are always
ready:
1. Misre
2. fuel System
3. comprehensive components (ccm)
once the vehicle is running, the eoBd system is continuously checking the above components, monitoring key engine sensors,
watching for engine misre and monitoring fuel demands.
non-continuous monitors - unlike the continuous monitors, many emissions and engine system components require the vehicle to
© Jack Sealey Limited
P 0 2 0 2
Identifying specic
malfunctioning
section of the
systems
Sub-systems
1= fuel and Air metering
2= fuel and Air metering
3= Ignition System or engine
Misre
4= Auxiliary emission controls
5= Vehicle Speed control and
Idle controls
6= computer output circuits
7= transmission controls
8= transmission controls
Original Language Version
VS8812 | Issue 1 27/02/17
Page 3
be operated under specic conditions before the monitor is ready. These monitors are termed non-continuous monitors and are listed
below:
1) eGr System
2) o2 Sensors
3) catalyst
4) evaporative System
5) o2 Sensor Heater
6) Secondary air
7) Heated catalyst
8) A/c system
3.5. EOBD Monitor Readiness Status
eoBd 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 eoBd system.
the purpose of recording readiness status is to allow inspectors to determine if the vehicle's eoBd system has tested all the
components and/or systems.
the power train control module (Pcm) sets a monitor to "ready" or "complete" after an appropriate drive cycle has been performed.
the drive cycle that enables a monitor and sets readiness codes to "ready" varies for each individual monitor. once a monitor is set
as "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 "ready" all of the time. If testing of a particular supported non-continuous monitor
has not been completed, the monitor status will be reported as "not complete" or "not ready".
In order for the eoBd monitor system to become ready, the vehicle should be driven under normal operating conditions. these
operating conditions may include a mix of highway driving and stop and go, city type driving, and at least one overnight-off period. for
specic information on getting your vehicle's EOBD monitor system ready, please consult your vehicle owner's manual.
3.6. EOBD Denitions
Powertrain control module (Pcm) - eoBd terminology for the on-board computer that controls engine and drive train. malfunction
Indicator Light (mIL) - malfunction Indicator Light (check engine) is a term used for the light on the instrument panel. It is to
alert the driver and/or the repair technician that there is a problem with one or more of vehicle's systems and may cause emissions
to exceed standards. If the mIL illuminates with a steady light, it indicates that a problem has been detected and the vehicle
should be repaired as soon as possible. Under certain conditions, the dashboard light will blink or ash. This indicates a severe
problem and ashing is intended to discourage vehicle operation. The vehicle on board diagnostic system can not turn the MIL off until
necessary repairs are completed or the condition no longer exists.
dtc - diagnostic trouble codes (dtc) that identify which section of the emission control system has malfunctioned.
Enabling Criteria - Also termed Enabling Conditions. They are the vehicle-specic events or conditions that must occur within the
engine before the various monitors will set, or run. Some monitors require the vehicle to follow a prescribed "drive cycle" routine as
part of the enabling criteria. drive cycles vary among vehicles and for each monitor in any particular vehicle.
EOBD Drive Cycle - A specic mode of vehicle operation that provides conditions required to set all the readiness monitors applicable
to the vehicle to the "ready" condition. the purpose of completing an eoBd drive cycle is to force the vehicle to run its onboard
diagnostics. Some form of a drive cycle needs to be performed after dtcs have been erased from the Pcm's memory or after the
battery has been disconnected. running through a vehicle's complete drive cycle will set the readiness monitors so that future faults
can be detected. drive cycles vary depending on the vehicle and the monitor that needs to be reset. For vehicle specic drive cycle,
consult the vehicle's owner's manual.
freeze frame data - When an emissions related fault occurs, the eoBd system not only sets a code but also records a snapshot
of the vehicle operating parameters to help in identifying the problem. this set of values is referred to as freeze frame data and may
include important engine parameters such as engine RPM, vehicle speed, air ow, engine load, fuel pressure, fuel trim value, engine
coolant temperature, ignition timing advance, or closed loop status.
3.7. EOBD Modes of Operation
Introduction to the eoBd communication protocol.
Mode $01 - Identies the Powertrain information and shows current data available to the scan tool. This data includes: DTCs set, status of
on-board tests and vehicle data such as engine RPM, temperatures, ignition advance, speed, air ow rates, and closed loop status for
fuel system.
mode $02 - displays freeze frame data. Same data as in mode 1, but it was captured and stored when a malfunction occurred and a
dtc was set. Some of the PIds for mode one are not implemented in this mode.
mode $03 - displays the type of powertrain or emission related dtcs stored by a 5 digit code identifying the faults. there may be more
than one response message if there are more trouble codes than will t in the data bytes of the response message, or if there are more
than one Pcm computer responding.
mode $04 - used to clear dtcs and freeze frame data. this clears all diagnostic trouble codes that may be set including freeze frame
data and readiness monitors.
mode $05 - oxygen Sensor test results. this mode displays the oxygen sensor monitor screen and the test results gathered about the
oxygen sensor.
there are ten numbers available for diagnostics:
1. $01 rich-to-Lean o2 sensor threshold voltage
2. $02 Lean-to-rich o2 sensor threshold voltage
3. $03 Low sensor voltage threshold for switch time measurement
4. $04 High sensor voltage threshold for switch time measurement
5. $05 rich-to-Lean switch time in ms
6. $06 Lean-to rich switch time in ms
7. $07 minimum voltage for test
8. $08 maximum voltage for test
9. $09 time between voltage transitions in ms
mode $06 - non-continuously monitored Systems test results. there are typically a minimum value, a maximum value, and a current
value for each non-continuous monitor. This data is optional, and it is dened by a given vehicle make if it's used.
mode $07 - request for dtcs (pending) from continuously monitored Systems after a single driving cycle has been performed to
© Jack Sealey Limited
Original Language Version
VS8812 | Issue 1 27/02/17
Page 4
determine if repair has xed a problem. This is used by service technicians to verify repair was performed properly and after clearing
diagnostic trouble codes.
mode $08 - this Special control mode requests control of the on-board system, test, or component bi-directionally (where applicable).
This mode is manufacturer specic.
mode $09 - reports vehicle information. this information includes vehicle VIn number and calibration information stored in the vehicle
Pcms.
mode $10 - request emission-related diagnostic trouble codes with Permanent Status. this mode is required for all emissions-related
DTCs. The presence of permanent DTCs at an inspection without the MIL illuminated is an indication that a proper repair was not veried
by the on-board monitoring system.
4. USING ThE SCaN TOOL
4.1. Tool Description
1. eoBd connector - connects the scan tool to the vehicle's data Link connector (dLc).
2. Lcd dISPLAY - Indicates test results.
3. Green Led - Indicates that engine systems are running normally (the number of monitors on the vehicle which are active and
performing their diagnostic testing is in the allowed limit, and no dtcs are present).
4. YeLLoW Led - Indicates there is a possible problem. A “Pending” dtc is present and/or some of the vehicle's emission monitors
have not run their diagnostic testing.
5. red Led - Indicates there is a problem in one or more of the vehicle's systems. the red Led is also used to show that dtcs are
present. dtcs are shown on the Scan tool's display. In this case, the mIL lamp on the vehicle's instrument panel will light steady on.
6. one-click function Key - Shortcut for 4 quick function including I/m readiness status, read code, usual datastream and all datastream.
7. ENTER/Exit BUTTON - Conrms a selection (or action) from a menu. Or returns to previous menu.
8. ScroLL Button - Scrolls through menu items.
9. uSB connector - connects the scan tool to the Pc for upgrading.
4.2. Specications
Screen: 2.0" tft color display (220 x 176 dpi)
external Power: 8.0 to 18.0 V power provided via vehicle battery.
operating temperature: 0 to 60°c (32 to 140 f°)
Storage temperature: -20 to 70°c (-4 to 158 f°)
dimensions:
Length Width Height
124 mm (4.64”) 72 mm (2.83”) 18 mm (0.71”)
nW: 0.18kg (0.39lb), GW: 0.21 kg(0.46lb)
4.3. Navigation Characters
characters used to help navigate the scan tool are:
1) “#” - Identies the control module number from which data is retrieved.
2) “Pd” - Identies a pending DTC when viewing DTCs.
4.4. Keyboard
no solvents such as alcohol are allowed to clean the keypad or display. use a mild non abrasive detergent and a soft cotton cloth. do
not soak the keypad as the keypad is not waterproof.
© Jack Sealey Limited
Original Language Version
VS8812 | Issue 1 27/02/17
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