AH Design pdf Bluetooth OBD
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1. Bluetooth OBD II Interface Adapter User s Manual Revision Sheet 3 15 2011 First revision of the manual User s Manual Page 1 USER S MANUAL TABLE OF CONTENTS Page Contents GENERAL INFORMATION oo a aa acid 4 1 1 DA e e m 4 1 2 LEV IP 4 GETTING STARTED rd 6 2 1 Connecting Everything Up iccsccccscsssssosscosssoossoescassecscenssesssvessoassoesseesssecsesossvbeesocessnossssesensecsostas 6 2 2 Launching the Software c 8 2 3 Reading Sensors and Trouble Codes 4 eee eee eee eee e eene eene einst te stia setas etas eta seta ae 8 2 4 Juneau 8 3 0 Bluetooth OBD II Adapter Capabilities cease e eee eee ee eee eene ee eene tn nean seta netta aee raae 10 Bluetooth OBD II Adapter Capabilities A ecce eee eese eese seen ee eene enne enne tate et tane erras eese sepas sera aee 11 3 1 STN1110 Features 11 3 2 Determining Vehicle OBD II Protocol eee ee esee esee ee eren seen etta setas etas etas etas ta seen aee 11 4 0 Bluetooth OBD II Adapter Specifications eere eese esee eene eene entente eterne etta aee e tasse sese enses eta nos 13 Bluetooth OBD II Adapter Specifications e eee eres sees esee ee eee ette nene tosta ne2. The drawing below shows the pins and their corresponding pin numbers 121000000008 9 16 L1 L1LILIL1LILLc1 Now find out which pins your vehicle has populated view the picture in section 2 above to see that each one of the connectors only has a handful of pins populated User s Manual Page 11 Now refer to the following table to figure out which protocol your vehicle uses based on the pins that are populated Pin Number Function 1 Single Wire CAN J2411 2 Bus of SAE J1850 PWM or VPW 3 Not used on adapter 4 Chassis Ground 5 Signal Ground 6 CAN High ISO 15765 4 SAE J2284 7 K line of ISO 9141 2 and ISO 14230 4 8 Not Used 9 Not Used 10 Bus of SAE J1850 only 11 Not used on adapter 12 Not Used 13 Not Used 14 CAN Low ISO 15765 4 and SAE J2284 15 L line of ISO 9141 2 and ISO 14230 4 16 Battery Positive For example if your vehicle has pin numbers 2 4 5 10 and 14 populated your vehicle will be using the SAE J1850 protocol and your vehicle was made by Ford All vehicles will have pins 4 and 16 populated as these are the power pins from which the Bluetooth OBD II adapter draws its power from As a rule of thumb Ford vehicles use the SAE J1850 PWM protocol Japanese vehicles use ISO 14230 Chrysler and other foreign vehicles use ISO 9141 and GM uses SAE J1850 VPW The exception to this are vehicles that are year 2005 some not all
3. monitoring of sensors or retrieving trouble codes easily In the Torque app for Android the app determines which sensor codes your vehicle supports and allows you view the corresponding sensor data as a graph dial gauge or a numerical readout Trouble codes are easy to access as well and Torque will attempt to describe what the trouble codes mean although researching the code on the internet for your particular vehicle will lead to more thorough information than what Torque can provide 2 4 Shutting Everything Down User s Manual Page 8 There aren t any specific set of instructions that need to be followed to disconnect the Bluetooth OBD II adapter from the vehicle The disconnect process can be initiated by shutting down the software on the master device turning the ignition to off or anything besides run or by physically unplugging the Bluetooth OBD II adapter from the vehicle However the ideal shutdown process would be to first shutdown the application on the master device and then turn the vehicle off or remove the Bluetooth OBD II adapter from the vehicle Warning The Bluetooth OBD II adapter may be left plugged into the vehicle for short periods of time no more than 1 2 weeks while the vehicle s engine is not started The Bluetooth OBD II adapter does use power very little power but not zero power when not in use which will eventually drain the vehicle s battery to the point where the vehicle will not be able to be started with
4. M port or the only COM port number greater than 4 COM6 for instance It will not be necessary to determine serial port number or anything of that on other systems User s Manual Page 7 2 2 Launching the Software Now that the Bluetooth OBD II adapter is paired to the master device it is now time to connect to it via your software package of choice For Windows OBDWiz ScanXL or any of the Scantool net software packages is recommended However other OBD II software packages that support the ELM327 can be used also For Android devices the app called Torque is highly recommended Palm users can use OBDGauge Each software package requires its own set of instructions to setup a connection to the Bluetooth OBD II adapter The user s manual for the respective software package should be consulted to establish the connection to the Bluetooth OBD II adapter However the basic steps needed to establish a connection to the Bluetooth OBD II adapter are similar across the various software packages You will need to perform something to the effect of Create a new connection select paired device to connect to or COM port number Windows only select baud rate any baud rate is acceptable however 115200 bps is recommended set the port to 8 N 1 8 bits no parity 1 stop bit and then open the connection If there are additional options to change the ELM327 baud rate or have the software automatically change ELM327 baud rates either disable t
5. er pre 2000 BMW s and possibly Audi s Also some vehicles 1996 and older may have the OBD II connector but do not fully comply with the OBD II spec To be sure your vehicle complies with OBD II look for a sticker on the vehicle under the hood in the engine compartment that clearly states OBD II compliant or certified An example of the sticker is shown below VEHICLE EMISSION CONTROL INFORMATION VACUUM HOSE ROUTING VEHICLE EMISSION CONTROL INFORMATION TEST GROUP 9TYXVO1 8BEA EVAP FAMILY 9TYXRO115P12 SFI A FS WU TWC HO2S TWC 1 8 LITER THIS VEHICLE CONFORMS TO U S EPA REGULATIONS APPLICABLE TO GASOLINE FUELED 2009 MODEL YEAR NEW TIER This vehicle conforms to California regulations applicable to 2004 model year new ULEV passenger cars OBDINI c rified TWC HO2S SFI EGR Attention Dyno Restrictions may apply Vehicle may have ABS Traction Control Adjustments Spark Plug Gap 051 057 No other adjustments needed CATALYST vere Wi 2009 NEW LEV II ULEV PASSENGER CARS CATALYST OBD X CERTIFIED 37120 ERI 3 9L Group 4FMXV03 9VH3 Evap 4FMXRO115BAE j USA amp CANADA Once the connector is located insert the Bluetooth OBD II adapter into the OBD II port The LEDs on the Bluetooth OBD II adapter will light up and then one of the LEDs will start blinking The blinking LED shows the Bluetooth status Once the adapter is
6. hose options if possible or force the ELM327 baud rate to 115200 bps For the Bluetooth OBD II adapter the ELM327 baud rate must be the baud rate that the Bluetooth module is expecting 115200 bps or else communications from the Bluetooth module to the ELM327 chip will not work The connection from the master device to the Bluetooth OBD II adapter can be whatever baud rate you would like as the onboard Bluetooth chip performs the master device lt gt Bluetooth module and Bluetooth module lt gt ELM327 baud rate translation Do not issue any ELM327 commands to change the ELM327 STN110 s baud rate If you do the Bluetooth OBD II adapter will need to be sent back to the manufacturer to reset the baud rates Once a connection is established the software on the master device will attempt to connect to the vehicle s OBD II bus and communicate with the ECU Engine Control Unit and other devices if supported The vehicle s ignition needs to be in the Run position for the ELM327 STN1110 to talk to the vehicle s ECU The engine doesn t have to be running though More LEDs will blink when the Bluetooth OBD II adapter is communicating with the vehicle and with the master device 2 3 Reading Sensors and Trouble Codes For each software package the method of reading sensor data and getting trouble codes called DTCs or Diagnostic Trouble Codes but there are usually setup screens or menus that are intuitive enough to allow the user to set up
7. ntool net STN1110 OBD II interpreter chip which is an upgrade to the standard ElmElectronics ELM327 1 2 Warnings Although the Bluetooth OBD II adapter by itself cannot and will not hard your vehicle the software that controls the adapter could be used to modify engine and other critical systems parameters The creator of this product cannot be held responsible for any vehicle damage caused by accessing a vehicle s OBD II system Above all do not use this product or software used in conjunction with this product while driving User s Manual Page 4 2 0 GETTING STARTED User s Manual Page 5 GETTING STARTED 2 1 Connecting Everything Up Before opening up your OBD II software to interact with the Bluetooth OBD II adapter some setup is required You will need to locate the OBD II interface connector inside your vehicle that the Bluetooth OBD I adapter will plug into In most vehicles it is found in the driver s side seating area under the dash In some vehicles the connector may be hidden behind an access door or even in the passenger s side seating area The connector you will be looking for will be identical or very similar to the ones shown below The following picture shows the OBD II port that is hidden behind an access door User s Manual Page 6 Note Some vehicles may require purchasing a special adapter to convert from a proprietary vehicle connector to an OBD II compliant connector This may be true for old
8. out getting a jump or having the battery recharged User s Manual Page 9 3 0 BLUETOOTH OBD II ADAPTER CAPABILITIES User s Manual Page 10 BLUETOOTH OBD II ADAPTER CAPABILITIES 3 1 STN1110 Features The STN1110 chip utilized by the Bluetooth OBD II adapter includes the following features Fully compatible with the ELM327 AT command set Extended ST command set e UART interface baud rates from 38 bps to 10 Mbps set to 115200bps in the Bluetooth OBD II adapter Secure bootloader for easy firmware updates see Scantool net for firmware updates Support for all legislated OBD II protocols e ISO 15765 4 CAN e ISO 14230 4 Keyword Protocol 2000 e ISO 9141 2 Asian European Chrysler vehicles e SAE J1850 VPW GM vehicles e SAE J1850 PWM Ford vehicles Support for non legislated OBD protocols e ISO 15765 e ISO 11898 raw CAN Support for SAE J1939 OBD protocol Heavy trucks Superior automatic protocol detection algorithm Large memory buffer 3 2 Determining Vehicle OBD II Protocol Even though the STN1110 chip on the Bluetooth OBD II adapter supports automatically determining the host vehicle s interface communication protocol there may be times where the user needs to have a better idea of which protocol is in use To easily determine which protocol s your vehicle supports the OBD II port in your vehicle most likely only contains the bare minimum pins needed for external devices to communicate with the vehicle
9. paired with another Bluetooth device and the connection is opened or used the blinking LED will then stay lit constantly To pair the Bluetooth OBD II adapter with your device that will access the adapter called the master device from now on you will need to go into the Bluetooth settings of the master device and search for discoverable Bluetooth devices This process will vary for every operating system that supports Bluetooth Once the device search has begun you will soon see a device named STN1110 OBD I This is the device you should select to pair with Initiate the pairing and then enter the PIN number of 1234 when asked to enter a PIN The master device will then be paired with the Bluetooth OBD II adapter In Windows XP an additional step may be required depends on third party Bluetooth adapter software to get a virtual serial port to be added to the system You may have to query the Bluetooth OBD II adapter to see what services it offers and then connect to the serial port provided by the adapter A similar action may need to be taken on PocketPC Windows CE or Mobile devices Windows 7 and Android will do all of this automatically PalmOS and Blackberry devices will probably be automatic as well On Windows systems master device you will need to find the serial port number COM port number that the Bluetooth OBD II adapter added to the system On most systems this will be either the only available CO
10. seta aestas ees aa seen nes et taste 14 4 1 Absolute Maximum Ratings eee eese eese esee eese eene ee en eee a testae etta aser sas nn nr nono nn corn rca setas ese to aeta 14 4 2 DC Power Requirements ees ees tei ete Duct aseo ana haus Ha ans an ne 14 User s Manual Page 2 1 0 GENERAL INFORMATION User s Manual Page 3 GENERAL INFORMATION 1 1 Overview The Bluetooth OBD II adapter you have just purchased enables you to read and monitor various sensors built into newer 1996 present cars light trucks and some heavy trucks too The adapter also allows you to read and clear trouble codes from the engine computer to assist in repairing your vehicle to pass emissions tests required by some states The adapter connects to smart phones tablet computers laptops and other devices that support the serial port protocol over a Bluetooth connection You must have a Bluetooth interface on the device you intend to pair with the Bluetooth OBD II adapter Free and licensed OBD II software is available for Android based devices PocketPC Windows CE or Windows Mobile devices Microsoft Windows XP Vista 7 Blackberry PalmOS and others Unfortunately Apple s 10S does not support the serial port protocol via USB so all Bluetooth OBD II adapters cannot be used with iPhones and iPods with Bluetooth All software that supports the ELM327 chip will work with this adapter This particular Bluetooth OBD II adapter is based on the Sca
11. vehicles 2005 2008 or newer 2008 and newer for certain as CAN bus was mandated in 2008 as these vehicles all use the CAN bus However even if a vehicle uses the CAN bus there are multiple CAN bus protocols To determine exactly which CAN bus protocol the STN1110 is using you will have to rely on the software running on the master device reporting the protocol being used User s Manual Page 12 4 0 BLUETOOTH OBD II ADAPTER SPECIFICATIONS User s Manual Page 13 BLUETOOTH OBD II ADAPTER SPECIFICATIONS 4 1 ABSOLUTE MAXIMUM RATINGS Storage Temperature 65 C to 150 C Operating Ambient Temperature 20 C to 70 C Supply Voltage 7VDC to 40VDC 4 2 DC POWER REQUIREMENTS Adapter State Power Consumption Min Power Consumption Max Unpaired Discovery Mode 0 8W 1 4W Paired Inactive on OBD II Bus 0 6W 1 1W Paired Active on OBD II Bus 0 6W 1 1W User s Manual Page 14
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