BMWAG
Electrical troubleshooting manual
5 Series - E34 (518i, 520i, 525td, 525tds, incl. touring) Schematics Model year 1994

Antilock brake system (ABS)
Scheme 3450.0

Pin Assignment X11
PinTypeDescription/FunctionConnection
1EVoltage supplyDME relay/DDE relay
2MComponent groundABS hydraulic unit - front left solenoid valve
3 not used
4MComponent groundFront left ABS sensor
5 not used
6EVoltage signalFront left ABS sensor
7 not used
8EVoltage signalRear left ABS sensor
9MComponent groundRear left ABS sensor
10 not used
11EVoltage signalFront right ABS sensor
12 not used
13 not used
14EVoltage supplyTerminal 87 pump relay
15 not used
16 not used
17ARelay activationTerminal 86 pump relay
18MComponent groundABS hydraulic unit - rear solenoid valve
19not used
20MComponent groundGround connection
21MComponent groundFront right ABS sensor
22 not used
23 not used
24EVoltage signalRear right ABS sensor
25MComponent groundBrake light switch
26MComponent groundRear right ABS sensor
27MComponent groundTerminal 85 valve relay
28MComponent groundTerminal 85 Pump relay
29EVoltage supplyTerminal 87 valve relay
30ARxD diagnosis lineDiagnostic connector
31E/ATxD diagnosis lineDiagnostic connector
32EVoltage supplyTerminal 87 valve relay
33 not used
34MComponent groundGround connection
35MComponent groundABS hydraulic unit - front right solenoid valve
E = Input, A = Output, M = Ground