BMW-airbag.pdf

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Contents
Directions-Using the SRS Scan and reset for BMW.....................................3
Function Reference.......................................................................................3
Code Reading Example................................................................................4
Using the Code Tables (which one to use)...................................................4
Code Tables..................................................................................................5
Glossary.......................................................................................................14
Appendix......................................................................................................15
Troubleshooting...........................................................................................15
Adaptor Advice.............................................................................................15
1
Tool Description
LCD DISPLAY
ENTER BUUTON
SCROOL BUTTON
OBD II CONNECTOR
1. 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
DIRECTIONS
1.)
2.)
Turn on key (DO NOT START CNGINE)
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 following
functions:
Functions:
Read Airbag Faults.
How to Read Airbag Faults. The tool automatically starts in the “FA” mode, (though it
won’t read the fault codes until you press the “ENTER” button). When ENTER is pressed
the first number shown will be the correct code chart to use.
Note: if it shows “--”.There are on codes to display. Pressing ENTER a 2
nd
time will
display the first fault code (see page 6 for explanation.) To view the next fault pressing
ENTER again, and so on. At the end of the fault list the display will show “--”.Press
ENTER 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 the
airbag light came on before resetting it always read the code and look it up first.
WARNING: DO NOT PROCEED WITH RESET UNTIL TAKING APPROPRIATE
ACTION TO DIAGNOSE, UNDERSTAND AND SOLUE THE PROBLEN WITH THE
AIRBAG 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 it
cones right back on moment you reset it, then there is still a problem with the SRS
system needs to be fixed.
3
Making sense of the codes
1.)
On the following pages, locate the correct chart for your car according to the first tow
digit 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 you
which code chart to use:
First indication is the chart #:
First indication is never a fault code!
In this example, the tool is telling
you 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 meaning
After resetting a code, drive vehicle over 15mph and re-check. If code persists or the
SRS 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 for
diagnosing a problem. The codes that your BMW generates can be misleading. There
may also be errors in this manual. Before spending your money on a repair or
replacement parts, make sure you have a clear understanding of the problem.
4
Code Tables
USE THESE CODE DERINITIONS WISELY:
The code definitions contained in this manual should be regarded as a starting point for
diagnosing a problem. The codes that your BMW generates can be misleading. There
may also be errors in this manual. Before spending your money on a repair or
replacement parts, make sure you have a clear understanding of the problem.
Table FF
Code Fault
1
2
5
OD
13
14
1B
21
2A
2B
Crash sensor closed once
Crash sensor closed more than once
Crash sensor closed permanently
Two firing circuits short-circuited
Crash-sensor supply wire, left, open circuit
Crash-sensor supply wire, right, short circuit
One firing circuit, short circuit to positive
One firing circuit, short circuit to earth
Resistance in the driver’s airbag firing circuit too low
Resistance in fifing circuit II (seat-belt tensioner or passenger’s airbag)
too low
2C
Resistance in firing circuit III (passenger’s airbag or equivalent
resistance) too low
2D
2E
Resistance in the driver’s airbag firing circuit too high
Resistance in firing circuit II (seat-belt tensioner or passenger’s airbag)
too high
Warning 1:
Codes can be misleading and there may also be errors in this manual.
Never depend solely on fault codes for diagnosis.
Warning 2:
Most SRS repairs require a BMW factory trained technician.
5

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