BMW Airbag - 123seminarsonly

ContentsDirections-Using the SRS Scan and reset for BMW.3Function Reference.3Code Reading Example.4Using the Code Tables (which one to use).4Code aptor Advice.151

Tool DescriptionLCD DISPLAYENTER BUUTONSCROOL BUTTONOBD II CONNECTOR1. LCD DISPLAY: shows the test results.2. ENTER BUTTON: confirms a selection of a menu list, or returns to the main menu.3. SCROLL BUTTON: Scrolls through menu items or cancel an operation.4. OBD II CONNECTOR: Connects the B800 to the vehicle’s Data link Connector(DLC)2

DIRECTIONS1.)Turn on key (DO NOT START CNGINE)2.)Plug tool into diagnostic connector Tool is ready to use when it displays “FA”.(Reverse steps 1and 2 if you encounter problems)3.)Use the “Scroll” button to select one of the followingfunctions:Functions:Read Airbag Faults.How to Read Airbag Faults. The tool automatically starts in the “FA” mode, (though itwon’t read the fault codes until you press the “ENTER” button). When ENTER is pressedthe first number shown will be the correct code chart to use.Note: if it shows “--”.There are on codes to display. Pressing ENTER a 2ndtime willdisplay the first fault code (see page 6 for explanation.) To view the next fault pressingENTER again, and so on. At the end of the fault list the display will show “--”.PressENTER to return to “FA”. If you encounter problems see troubleshooting page 15”Clear Airbag light/Faults:How to Clear the Airbag (SRS) Light. It is important what you know exactly why theairbag light came on before resetting it always read the code and look it up first.WARNING: DO NOT PROCEED WITH RESET UNTIL TAKING APPROPRIATEACTION TO DIAGNOSE, UNDERSTAND AND SOLUE THE PROBLEN WITH THEAIRBAG SYSYEM.1.)Using the “Scroll” button , select “CA”: Press “ENTER”The tool will reset the SRS light and display If Airbag light does not appear reset, or itcones right back on moment you reset it, then there is still a problem with the SRSsystem needs to be fixed.3

Making sense of the codes1.) On the following pages, locate the correct chart for your car according to the first towdigit number displayed by the tool:Code Reading Example:After plugging the tool, “FA” is displayed (See page 5)Pressing ENTER will start the process. Before showing a code the tool will first tell youwhich code chart to use:First indication is the chart #:First indication is never a fault code! In this example, the tool is tellingyou to use the chart labeled FF (see page 7)Press ENTER again-the first code will be displayed, example:This is an example of a code :”1b”(not16)2.) Look up the two digit code in the chart to obtain meaningAfter resetting a code, drive vehicle over 15mph and re-check. If code persists or theSRS light returns contact a BMW dealer.USE THESE CODE DEFINITIONS WISELY:The code definitions contained in this manual should be regarded as a starting point fordiagnosing a problem. The codes that your BMW generates can be misleading. Theremay also be errors in this manual. Before spending your money on a repair orreplacement parts, make sure you have a clear understanding of the problem.4

Code TablesUSE THESE CODE DERINITIONS WISELY:The code definitions contained in this manual should 30Seat back locking K-BusF0Control unit fault, internal errorFFUnknown error locationTable 10 and Table 04Code Fault1firing circuit, driver airbag, Stage 12firing circuit, belt tensioner, driver side3Firing circuit, belt tensioner, passenger side4Firing circuit, passenger airbag, Stage 15Firing circuit, side airbag, front left side6Firing circuit, side airbag, front light side7Firing circuit, side airbag, rear left side8Firing circuit, side airbag, rear light side9Firing circuit, head airbag, front left side0AFiring circuit, head airbag, front light side0BFiring circuit, battery safety switch 10CFiring circuit, passenger airbag, Stage 20DFiring circuit, head airbag, Stage 20EFiring circuit, head airbag, rear left side0FFiring circuit, head airbag, rear right side10Firing circuit, battery safety switch 211Firing circuit, belt tensioner, rear left12Firing circuit, belt tensioner, rear right13Firing circuit, belt tensioner, rear middle14Firing circuit15Firing circuit, driver airbag, Stage 2Warning 1: Codes can be misleading and there may also be errors in thismanual. Never depend solely on fault codes for diagnosis.Warning 2:Most SRS repairs require a BMW factory trained technician.11

16Firing circuit30Firing circuit, driver airbag, Stage 131Firing circuit, belt tensioner, river side32Firing circuit, belt tensioner, passenger side33Firing circuit, passenger airbag, Stage 134Firing circuit, side airbag, front left side35Firing circuit, side airbag, front left side36Firing circuit, side airbag, rear left side37Firing circuit, side airbag, rear right side38Firing circuit, head airbag, front left side39Firing circuit, head airbag, front right side3AFiring circuit, battery safety switch 13BFiring circuit, passenger airbag, Stage 23CFiring circuit, driver airbag, Stage 23DFiring circuit, head airbag, rear left side3Firing circuit, head airbag, rear light side3FFiring circuit, battery safety switch 240Firing circuit, belt tensioner, rear left41Firing circuit, belt tensioner, rear right42Firing circuit, belt tensioner, rear middle43Firing circuit44Firing circuit, passenger airbag, Stage 245Firing circuit,50Supply voltage51Fault lamp (AWL)52Warning lamp (HWL)60Seat belt buckle switch, driver61Seat belt buckle switch, passenger62Seat belt buckle switch, rear leftWarning 1: Codes can be misleading and there may also be errors inthis manual. Never depend solely on fault codes for diagnosis.Warning 2:Most SRS repairs require a BMW factory trained technician.12

63Seat belt buckle switch, rear right64Seat belt buckle switch, rear middle70Seat occupancy sensor71Seat occupancy sensor II72Seat occupancy sensor and K-Bus73Seat occupancy sensor Driver74Seat occupancy sensor Passenger75External Roll Sensor80Satellite (MRSA),front81Satellite (MRSA),front left82Satellite (MRSA),front left83Satellite (MRSA),front left84Satellite (MRSA),front right85Satellite (MRSA),front right86Satellite (MRSA),front right87Satellite (MRSA),front right88Satellite (MRSA),front left90Coding block (CBD-Block)91Crash telegram memoryF0Internal errorEnd of Code TablesWarning 1: Codes can be misleading and there may also be errors inthis manual. Never depend solely on fault codes for diagnosis.Warning 2:Most SRS repairs require a BMW factory trained technician.13

GlossaryAC Air conditionerABS Anti-lock Brake SystemASC kid control (see “Intervention”)ADS Aux Throttle Position MotorAHK Active Rear Axle KinematicsBLS Brake Light SwitchCheck Engine Light: on the dashboard,indicates the DME was detected aproblemCC Check controlCD Carbon MonoxideCDE ECU for Diesel EngineDiagnostic Connector: Where the SRSScan and Reset for BMW plugs into thecar.DISA intake runner length tuningmechanismDME Engine ECU (Gasoline engine):Monitors and controls all engine sensorsand functionsDSC Dynamic Stability ControlDTC Diagnostic Trouble CodeDWA Alarm systemE Communications error: See“Flashing E below”EGS Electronic AutomaticTransmissionEKAT Electrically heated catalyticconvertorEKM electronic Body ModuleEML Electronic Throttle ControlEVAP relates to fuel vapor recoveryoften his code indicates a loose gas capEWS Drive away protection (alarmsystem)Fault code: a “code” stored in the SPScontroller memory bank that indicates apast or present problem.Fuel Trim adjustments to maintainproper air fuel ratio (see LambdaControl)Flashing E: (in this product display)communication problem in the followingGM General ModuleIntervention, MSR, ASC Intervention is when another control unit(1.e.sdid control) requests apower/torque change from the DME.Code indicates DME assessed therequest as being incorrect or too long.Lambda Control Code means DME isunable to maintain requisite air/fuel ratiodue to external factor (air see fuel trim)LDP Loss Diagnosis PumpLoad Calculation Cross Check (HFMVS TPS) when actual air flowexceeds /-25% of calculated air flow.MDK Motorized Throttle ValveMLF Multi function Steering WheelMSR Drag Torque Intervention (torquereduction for anti skid) see InterventionaboveNTC coolant temperature sensorOilservice & Inspection: Also called Si(abbrev. For service interval)maintenance reminder lightsPWG Pedal Sensor PotentiometerQL idle air mass adaption (see FuelTrim)RAM SRS random access memoryROM SRS program memoryScan Tool: Generic tern for this productSI Service IntervalSMG BMW Motorsport SequentialGearboxTD Tachometer SignalTEV Evap,fuel tank vent/purge valveTi Additive: idle fuel adaption (see fueltrim)Ti multiplicative: adaption a percentage /- of injector tome (see Fuel Trim)TR signal from DME, RPM and valvepositionVANOS Adjustable Valve TrainVDS Vehicle Description System. VINDigits 4-7VIN Vehicle identification number.ZAB see ASCZKE Central Body Electronics Forfurther definitions, please consultdocumentation for the vehicle.14

Common Problems/Troubleshooting/Appendix①Flashing E message on tool:Occasionally the B800 will flash “E” when an attempt is made to read codes or reset theAirbag/SRS light. “E” means the car is not responding to the tool: This happens when thedata line (also called “diagnostic bus”) in the car “hung” or disabled.Things To Try to Resolve the Flashing “E”:1.)Reversing the power-up sequence: Plug in the SRS Scan Reset for BMW in first,Then turning on the ignition key. This in the opposite of the routine specified by themanual and the tool label. This procedure has proven very effective on some cars.2.)Insertion Depth: Check the insertion depth of the SRS Scan Reset for BMW. If it isnot fully inserted the unit will not work3.)Pin 19: Observe that pin 19 of your diagnostic connector is not processed. Anumber of models had pin 19 improperly installed. While you’re looking at the diag portENTER ahead and check out all the pins.4.)Cycle power: Plug in tool, cycle the ignition key on and off two or three times (donot start engine)5.)Other waning lights: Observe that no other malfunction indicator lights are on.Often a malfunctioning module (i. e DME, EGS/transmission, ABS traction control, etc.)can hang the diagnostic bus (see above).6.)Power resetting of all modules (entire car)a.)Disconnect the main car battery.b.)Activate the emergency flasher lights (this will fully drain all power fromall ECUs) wait 5 minutes.c.) Reconnect the main battery and try the tool again.15