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OBC wiring pin out

Pin number

Function

Input/Output

Signal

1 Horn Output Ground, approx. 1 Hz
2 Gong Output Ground , approx. 2.5 seconds
3 Not used    
4 Remote control Input Ground
5 KL R (accessory position ) Input Battery Voltage
6 KL 30 Permanent memory Input Battery Voltage
7 KL 15 Ignition - Start/ Run Input Battery Voltage
8 KL 58K Light switch Park/ Head Input Battery Voltage
9 KL 31g for dimming display Input Variable ground
10 KL 31 Input Ground
11 Relay box, car immobilization ignition cut out Output Ground
12 Not used    
13 Not used    
14 Not used    
15 Fuel level sender Input Variable resistance
16 Ambient temp sensor Input Variable resistance
17 Fuel consumption rate Input Frequency
18 Fuel level reserve switch Input Resistance
19 Not used    
20 Not used    
21 Distance signal Input Frequency
22 KL 50 Ignition - Start position Input Battery Voltage
23 Not used    
24 Not used    
25 Not used    
26 Not used    
 

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E30 M3 Repair Manual V2.7.  Copyright ©1999-2001 Koala Motorsport & Brett Anderson