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

Antitheft system III (DWA III)
Scheme 6575.1

Pin Assignment
A=X252 26-pin, black
B=X331 10-pin, black
C=X335 4-pin, black
D=X1221 26-pin, white
Pin Assignment X252
PinTypeDescription/FunctionConnection
1ARxD diagnosis lineDiagnostic connector
2E/ATxD diagnosis lineDiagnostic connector
3ERear seat/battery monitoringRear seat/battery microswitch
4ETouring: Rear lid lockRear lid lock switch
5ERear lidRear lid light switch
6A"Visual alarm"Crash alarm generator
7EQZVGeneral module
8AStatus LEDLED
9EZV drive, rear lidZV motor drive switch
10EZV drive, driver's doorZV motor drive switch
11not used
12EZV drive, passenger's doorZV motor drive switch
13ELock signal, IRSIR control unit
14ETouring, rear lid lockRear lid lock switch
15EZV drive, rear lidZV motor drive switch
16EFront passenger's doorPassenger's door contact
17EConnection terminal RWiper relay
18ECentral double-lockingDoor lock switch
19EPosition pulseInstrument cluster
20EFront lid/radioFront lid/radio contact
21EDriver's doorDriver's door contact
22EGlove boxGlove box contact
23ETouring: DWA conductor loopRear right side window
24EDoor contacts, rearDoor contacts
25not used
26ETouring, rear lidRear lid contact
E = Input, A = Output, M = Ground
Pin Assignment X331
PinTypeDescription/FunctionConnection
1AImmobilizing deviceDME control unit/DDE control unit
2MGroundGround connection
3ESignal, ignition ONTerminal 15
4ETerminal 61Charge indicator
5not used
6not used
7ETouring DWA conductor loopRear right side window
8EWindows, rear rightRear right window contact
9EFront passenger's door windowPassenger's window contact
10ERear windowAerial amplifier
E = Input, A = Output, M = Ground
Pin Assignment X335
PinTypeDescription/FunctionConnection
1AAlarm (horn) connectionAntitheft horn
2ATerminal 30SOn-board computer, inclination monitor
3EOn-board computer alarmOn-board computer
4ETerminal SOUBattery
E = Input, A = Output, M = Ground
Pin Assignment X1221
PinTypeDescription/FunctionConnection
1not used
2not used
3not used
4not used
5not used
6not used
7not used
8EInclination sensorInclination sensor
9AControl line inclination sensorInclination sensor
10not used
11EWindows, rear leftRear left window contact
12EDriver's door windowDriver's window contact
13ETouring, DWA conductor loopFront left side window
14not used
15not used
16not used
17not used
18not used
19not used
20not used
21not used
22not used
23not used
24EWindows, rear rightRear right window contact
25EFront passenger's door windowPassenger's window contact
26ERear windowRear window defogger
E = Input, A = Output, M = Ground