obd manual by autoobdtools
Contents
1. Terminal 16 Scan tool power Unswitched battery positive voltage OBD Industry quick guide www autoobdtools com The Location Of 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 12 inches from the center of the instrument panel dash under or around the driver s side for most vehicles if you can t find it you can refer owner Manual or search on google DLC Equip Position SAE J1962 do the following functional requirements to the position of the DLC Consistency of Location The vehicle connector shall be located in the passenger compartment in the area bounded by the driver s end of the instrument panel to 300mm beyond the vehicle centerline attached to the instrument panel and accessible from the driver s seat The preferred location is between the steering column and the vehicle centerline The vehicle connector shall be mounted to facilitate mating and unmating Ease of Access Access to the vehicle connector shall not require a tool for the removal of an instrument panel cover connector cover or any barriers The vehicle connector should be fastened and located as to permit a one handed blind insertion of the mating test equipment connector Visibility The vehicle connector should be out of the occupant s front and rear seat normal line of sight but easily visible2. 2 function support if a code reader support many and complicated function it Il more useful to diagnostic cars but as a junior DIYER we usually need a general code reader advance scan tool not suit for newbie it designed for car repair shop or advance DIYER so when you choose you just need take under 100 buy a code reader that enough for you after you improve your level you can buy a advance scan tool professional diagnostic tools ecu programmer and etc 3 does it support upgrade every year vehicle manufacturers may release new models and revise existing models so if you want your scan tool to fully support the new vehicles it must be updated Professional quality scan tools are updateable 4 come with a user manual For anyone working on his or her own vehicle the Factory Service Manual or owner manual is a must have But the scantool itself may be able to provide some of that necessary information When a trouble code is set does the tool display the DTC number or give the full definition A tool that displays the full definition will save a lot of time and frustration Does the tool offer any information on typical readings to explain what the reading is if don t you can lookup on the category OBD II dtc codes lookup of our blog search obd trouble codes obd dtc codes obd trouble codes for your vehicle s model brand or on the obd codes com to get info 5 can save diagnostic datas when park your car in a ditch to try a
3. Other problems may trigger the engine warning light to come include e a failed sensor such as oxygen coolant temperature MAP manifold absolute pressure or airflow meter e engine problems such as poor performance faulty spark plugs and wires or clogged fuel injectors e emissions problems such as a loose or cracked vacuum hose loose or missing gas cap or a failed EGR exhaust gas recirculation valve e electrical wiring that has a short or open circuit 18 OBD Industry quick guide www autoobdtools com How you should react to the warning light depends on how the light behaves e If the light comes on for a little while and then goes out you may have a momentary problem in the system Once the light goes out the problem is no longer occurring but it may have caused the computer to store a diagnostic trouble code in its memory This isn t cause for immediate action however you should take the vehicle in as soon as you can and have it looked at e If the light comes on and stays on it indicates an ongoing problem It may not be a major problem however it may affect your car s performance gas mileage and emission levels Definitely take your vehicle to a repair shop as soon as possible e If the light flashes on and off the vehicle has a severe problem that will cause additional damage If your repair shop is nearby take the car in immediately If not shut off the car and call for assistance Your car s user manua
4. to a crouched technician SAE J1962 Diagnostic Connector June 1992 Just take the following fig as a showing example Driver Side lt gt Passenger Side GEG Preferred Connector Location Vehicle Centerline J Allowable Connector Location other than the preferred location OBD Industry quick guide www autoobdtools com Picture from EPA VPCD 98 14 On Board Diagnostic Guidance Diagnostic Link Connector Location and Accessibility Diagnostic Link Connector Mapping Diagram BSS Preferred Connector Location li Vehicle Centerline For Example Audi A4 MY 1998 OBD Industry quick guide www autoobdtools com F The Location of Data Link Connector OBD Industry quick guide www autoobdtools com Diagnostic Trouble Codes DTC s EOBD 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 EOBD 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 structu
5. OBD Industry quick guide www autoobdtools com 0BD OBD Industry Quick Guide OBD Industry quick guide www autoobdtools com Table of contents OBD HISCORY A E ET A horas 2 OBD freni n E E ee TE ATEA EE 3 OBD cirenean cat aia a a a Aaa a 3 EOBD nri eninnd n amina ent a a E 4 ODD e e a a a POM aa a a a a EN 4 0 21B Agoo E E C E E E EE 5 OBD II data link CONMECEOS isccsicsscccvccceescctasscesscsascecustcssneveniecuerdesnevenctcdercntiayes 6 Pin Definition eee a E E E E E EN 7 Th locatioMm Of D G e naen ernas n A ONAE AAE uate SRANAN a 8 PCED POSEN Wetec wets theca sca east e Ei 8 Diagnostic Trouble Code S DTC S ceceeceeseeseeseeeeeeeceseeseeeeeeeeeeeseeseeaeeeees 11 Mainly OBD Product In the Market eee ceseecseceseeceseesseeeeeeeeneees 12 Auto code readerin e E A EE testes 12 Mainly 7 Brand in the market esssesssesseseseessessesesresesrrsesessrsesresesess 12 Auto code reader common feature eesssseeersersesersrrrrserrersersesse 14 When you buy code reader maybe you usually can see below terms in the product description e eeesssessssrrsrsreeisreersrsreresreersreresrsns 15 How to use an Auto code reader eesesessesesereeiseisersesersersererrserseeseee 15 Something you need note when buy a code readet 00 16 The reason of trigger the check engine warning Light On 17 OBD Industry quick guide www autoobdtools com OBD History OBD was first us
6. This is a newer version of the IS09141 protocol It has a provision for a fast initialization which may be used instead of the slow 5bps handshake sequence CAN Controller Area Network ISO 15765 SAE 32480 CAN is becoming the most widely used bus for in vehicle communications It is a high speed high performance protocol OBD Industry quick guide www autoobdtools com Other non OBD2 protocols LIN Local Interconnect Network LIN is a low cost low speed in vehicle network intended to complement the higher performance CAN network Vehicle systems with modest network requirements are placed on a LIN sub network to reduce costs The LIN sub networks connect to the vehicle s CAN network via gateways LIN uses a single wire enhanced ISO9141 implementation non OBDII protocol UBP UART Based Protocol UBP is a Ford defined protocol CCD CCD is a Chrysler defined protocol ALDL ALDL Assembly Line Diagnostic Link ALDL is GM defined protocol OBD II data link connector s i z ee pt lm ry m aa f e me g gt TT j n ii a Oo ered 1e 16 Pin Data Link Connector DLC Since 1996 the data link connector DLC is a standardized 16 cavity connector shown below Connector design and location is dictated by an industry wide standard Vehicle manufacturers can use the empty DLC cavities for whatever they would like however the DLC of every vehicle is required to provide pins 4 and 5 and 16 as defined below When t
7. ces that connect to your car s on board diagnostic system and read its information They have other diagnostic features including the ability to reset or turn off the Check Engine Light or other fault lights Mainly 7 Brand in the market 1 Autel Website http www auteltech com autel is a chinese company mainly produce automotive diagnostic tools such as Code Readers Scan Tools Oil Reset Tool etc Mianly Product Model MaxiScan Code Readers MaxiScan MS300 MaxiScan MS309 MaxiScan Scan Tools OBD Industry quick guide www autoobdtools com 2 Launch MaxiScan MS310 MaxiScan MS409 MaxiScan VAG405 MaxiScan MS509 MaxiScan MS609 MaxiDiag JP701 MaxiDiag EU702 MaxiDiag US703 MaxiDiag FR704 MaxiDiag PRO MD801 ABS Airbag Scanner AA101 Website http www cnlaunch com Launch Tech Co Ltd was founded in 1993 and is the first professional high tech company of in China for developing producing and selling manufacture that providing a full range of Auto Diagnosis Auto Testing Auto Cleaning equipment and service solutions for workshops Launch was listed on the Hong Kong stock market in 2002 HK STOCK CODE 8196 and is one of the first Domestic enterprises which successfully financed in Hong Kong Mianly Product Model Scan tool X 431 Diagun X 431 Heavy Duty X 431 Master X 431 Tool AutoBook DIY Scan Tool 3 Actron Creader VI Creader IV FOR OBDII amp EOBD OBDBook 6830 CReader V CRecorder
8. compliant US European and Asian vehicles Easily determines the cause of the Check Engine Light Turns off Check Engine Light MIL clears codes amp resets monitors Displays DTC definitions on screen Views freeze frame data Backlit display CAN compliant have the ability to read a vehicle s Vehicle Identification Number Views freeze frame data OBD Industry quick guide www autoobdtools com Manufacturer Specific Codes Come with Molded Storage Case Some models have the capability of updating their internal software When you buy code reader maybe you usually can see below terms in the product description Abbreviations ABS Anti lock Brake System CAN Controller Access Network a standard for connecting electronic control units ECUs DTC Diagnostic Trouble Code The numerical error code retrieved from the vehicle s computer DTC Definitions Diagnostic Trouble Code definitions What the numerical error codes actually mean MIL Malfunction Indicator Lamp OBD On Board Diagnostics OBD II On Board Diagnostics II the standard for 1996 and newer cars PO P2 P3 UO Codes These are generic codes common to all OBD II cars P1 P3 and U1 These are manufacturer specific codes VIN Vehicle Identification Number How to use an Auto code reader 1 find the location of diagnostic link connector DLC if can t find it pls refer your owner manual or search on google for result 2 Remove th
9. e DLC cover if there is one 3 Insert the code reader s plug into the DLC outlet This outlet is easily identified since it is similar in shape to the code reader s plug 4 Turn the ignition key to the on position without starting the engine This will provide power to all electrical components and illuminate the instrument panel lights 5 Read the menu of the code reader and use the key or arrow to move to the read codes or DTCs diagnostic trouble codes option If someting you don t know you will need to read the manual of the code reader to fully understand all of its functions 6 Press the enter key if applicable once the read codes or DTCs option has been selected Refer to the code reader manual to determine which DTC triggered the malfunction indicator lamp MI also known as the check engine light or service engine light OBD Industry quick guide www autoobdtools com Something you need note when buy a code reader 1 did this code reader cover your vehicle when you view the code reader the first thing you should consider is Will it work on my vehicle Although it s true that OBDII system is a standard there are five different types of hardware communications used by OBDII vehicles Some tools support all five and some are manufacturer specific so you should check if you can t see whether it support your car in product description you should ask the deal or buy from another that have clearly instruction
10. ed by General Motors GM introduced in 1982 the purpose of obd is to monitor the emission control system Once has a fault OBD system lighten dashboard indicator light to inform the driver At the same time build in computer often referred to as the engine control unit or module that is the ECU or ECM in vehicle will record trouble code This code can obtain by appropriate equipment in order to facilitate troubleshooting General Motors GM uses an internal standard to achieve an external device to communicate with the electronic control unit This communication standard was called Assembly Line Communications Link ALCL Later renamed the Assembly Line Diagnostics Link ALDL the Assembly Line Diagnostics Link ALDL protocol communicates at 160 baud with Pulse width modulation PWM signaling and monitors very few vehicle systems An upgraded version of the ALDL protocol appears which communicates at 8192 baud with half duplex UART signaling This protocol is defined in GM XDE 5024B OBD Industry quick guide www autoobdtools com OBD I General Motors GM propose the concept get the California Air Resources Board CARB attention In 1985 CARB adopted the standards developed by SAE and Require all vehicles sold in California must have some basic OBD functions from 1988 These requirements are generally referred to as OBD I OBD I can only control some parts and some of the emissions related to the circuit problem the diagnosis is
11. engine and transmission B for Body C for Chassis and U for Network OBD Industry quick guide www autoobdtools com EOBD EOBD is a version of OBD II required in Europe since Model Year 2003 for diesel vehicles and since 2001 for gasoline vehicles With Euro V and Euro VI emission standards EOBD emission thresholds will be lower than previous Euro III and IV EOBD refers to Europe On Board Diagnostics JOBD JOBD is a version of OBD II for vehicles sold in Japan OBD II EOBD JOBD content above from wiki http en wikipedia org wiki On board_diagnostics OBD Industry quick guide www autoobdtools com OBD Protocol List An OBD2 compliant vehicle can use any of the five communication protocols ins 2 4 5 10 and 16 Must have pins 4 5 6 14 and 16 Must have pine 24 510 on Pin 5 may not be used Must have 4 5 7 and 16 Must have pins 2 4 5 and 16 Pin 15 is optional Not pin 10 PWM Pulse Width Modulated SAE J31850 SAE established OBD II communication standard used by Ford domestic cars and light trucks One of three hardware layers defined by OBD II VPW Variable Pulse Width Modulated SAE J31850 SAE established OBD II communication standard used by GM cars and light trucks One of three hardware layers defined by OBD II K Line IS0 9141 2 1994 Amd 1 1996 Road vehicles Diagnostic systems Part 2 CARB requirements for interchange of digital information Amendment 1 ISO 14230 4 KWP2000
12. for OBDII Website http www actron com actron is an american company mainly produce Scan tools code scanners code readers automotive diagnostics automotive batteries battery management etc Mianly Product Model actron Scan Tools AutoScanner CP9575 Elite AutoScanner Pro CP9190 Elite AutoScanner CP9185 AutoScanner Plus CP9580 OBD Industry quick guide www autoobdtools com actron Code Readers PocketScan Code Reader CP9125 PocketScan Plus CP9550C actron Code Scanners Ford Code Scanner CP9015 GM Code Scanner CP9001 4 Equus Innova Website http www equus com Equus has manufacturing facilities located in Taiwan China and the United States Sales service and warehousing facilities for North America are located in Fountain Valley California and Vancouver British Columbia All products distributed in North America are researched developed and designed at the California facility Mianly Product Model Obd2 diagnostic tool 3020 CanOBD2 Tool 3030 CanOBD2 Car Reader 3040 OBD2 ScanToo l 3100 CanOBD2 Diagnostic Tool 3120 CanOBD 2 amp 1 Tool Kit 3130 Scan Tool CanOBD2 3140 Scan Tool CanOBD2 amp 1 Kit 3150 ABS CanOBD2 Diagnostic Tool 3160 ABS CanOBD2 Scan Tool 5 Roadi Website http www roadico com about php 6 AutoXray Website http www autoxray com 7 0TC Website http www otctools com Auto code reader common feature Can Work 1996 amp later OBD2 CAN
13. he Controller Area Network CAN protocol is fully implemented in the 2008 model year all vehicles must use pins 6 and 14 as defined below OBD Industry quick guide www autoobdtools com Pin Definition Terminal Designation Pin 1 Manufacturer discretion Pin 2 SAE J1850 Line Bus positive line Pin 3 Manufacturer discretion Pin 4 Chassis ground Pin 5 Signal ground Pin 6 CAN data Bus high ISO 15765 4 Pin 7 K line ISO 9141 2 ISO 14230 4 Pin 8 Manufacturer discretion Pin 9 Manufacturer discretion Pin 10 SAE J1850 Bus negative line Pin 11 Manufacturer discretion Pin 12 Manufacturer discretion Pin 13 Manufacturer discretion Pin 14 CAN data bus low ISO 15765 4 Pin 15 L line Pin 16 Battery positive Terminal 2 SAE J1850 10 4k bits per second BPS variable pulse width serial data GM Class2 or SAE J1850 41 6k bps pulse width modulation serial data high line Ford Terminal 4 Scan tool chassis ground Terminal 5 Common signal ground for serial data lines Logic Low Terminal 6 ISO 11898 15765 SAE J2284 CAN serial data high line Terminal 7 ISO 9141 K serial data Line or ISO 14230 Keyword 2000 serial data line DaimlerChrysler Honda Toyota Terminal 10 SAE J1850 41 6k bps pulse width modulation serial data low line Ford Terminal 14 ISO 11898 15765 SAE J2284 CAN serial data low line Terminal 15 ISO 9141 L serial data Line or ISO 14230 Keyword 2000 serial data line DaimlerChrysler Honda
14. l is the best source of information on maintaining your car s performance and dashboard warning lights
15. more limited In addition data communication protocol of get OBD information and connect an external device and the ECU interface is still not standardized OBD II OBD II is an improvement over OBD I in both capability and standardization The OBD II standard specifies the type of diagnostic connector and its pinout the electrical signalling protocols available and the messaging format It also provides a candidate list of vehicle parameters to monitor along with how to encode the data for each There is a pin in the connector that provides power for the scan tool from the vehicle battery which eliminates the need to connect a scan tool to a power source separately However some technicians might still connect the scan tool to an auxiliary power source to protect data in the unusual event that a vehicle experiences a loss of electrical power due to a malfunction Finally the OBD II standard provides an extensible list of DTCs As a result of this standardization a single device can query the on board computer s in any vehicle This OBD II came in two models OBD IIA and OBD IIB OBD II standardization was prompted by emissions requirements and though only emission related codes and data are required to be transmitted through it most manufacturers have made the OBD II Data Link Connector the only one in the vehicle through which all systems are diagnosed and programmed OBD II Diagnostic Trouble Codes are 4 digit preceded by a letter P for
16. nd watch a code reader display while doing a roadtest A tool that saves data can allow safe viewing back at the garage it is a must function Be certain that the tool you buy has this capability OBD Industry quick guide www autoobdtools com The reason of trigger the check engine warning Light On 60 4 140 20 S 60 4 v The Check Engine light of your vehicle is designed to turn on when certain sensors aren t functioning properly a valve is loose or your car s about to explode just kidding about the last one It can be difficult to figure out what the Check Engine light is trying to tell you to but there are a few things you can check yourself The oxygen sensor is probably the most common cause of a check engine warning However it can be a gradual deterioration of the sensor and the driver may not notice the resulting reduction in overall engine performance Maintenance schedules generally recommend an inspection or replacement every 50 000 to 80 000 kilometres if it s an unheated 1 or 2 wire sensor or every 100 000 to 160 000 kilometres if it s a heated 3 or 4 wire OBD2 sensor A degraded oxygen sensor can increase fuel consumption by 10 to 15 percent Definitely not what you want when fuel prices are as high as they are Other signs that the oxygen sensor is worn out include excessive exhaust emissions engine surging or hesitation even premature failure of the catalytic converter
17. re of the digits Systems B Body Identifying specific C Chassis malfunctioning P Powertrain section of the U Network systems Code Type Sub systems Generic SAE l Fuel and Air Metering PO P2 P34 P39 2 Fuel and Air Metering BO B3 3 Ignition System or Engine Misfire co C3 4 Auxiliary Emission Controls UO U3 5 Vehicle Speed Control and Idle Manufacturer Specific Controls P1 P30 p33 6 Computer Output Circuits Bl B2 7 Transmission Controls Ci C2 8 Transmission Controls Ul U2 OBD Industry quick guide www autoobdtools com Mainly OBD Product In the Market You usually can see below products in the market Airbag reset tool Auto code reader Auto ECU programmer Auto Key Programmer auto locksmith tool Chip Tuning Tool Mileage Correction Tool Diagnostic Software Professional Diagnostic Heavy Duty Diagnostic Other OBD2 Vehicle Tools In this document I mainly want to introduce auto code reader because it can be used for all the pepole who own a car if you want to buy other OBD products pls visit our offical website http www autoobdtools com you can get help by live support for online chat with our Customer Service on business time or you can call 0086 755 28186070 Also you can send a email to service autoobdtools com Auto code reader Auto Code reader are also called auto code scanners automotive diagnostic code readers and OBD II Code Readers They are handheld devi
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