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15 pin BMW proprietary connector layout
15 pin BMW proprietary connector
used in all models of BMW until 1988 year


Description (may be empty)
1 GND  Ground
4    Temperature sensor
5    Oxygen sensor
6    SRS diagnostic
7    Oil service and inspection reset
8    –°rankshaft position (+)
9    Shield
10    –°rankshaft position (-)
11   Starter external turn on 
12    Generator status
13    Ignition status
14    Battery power
15    Ignition power


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BMW old 15 pin diagnostic interface connector visual pinout:click to enlarge
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