A1 General module

Plug connector overview

NumberX-pin, colourDescription
X25326-pin, blackPlug connector B General module
X25420-pin, blackPlug connector C General module
X33226-pin, naturalPlug connector A General module

Pin assignments at plug connector X253

PinTypeDescription / Signal typeConnection /
Measuring notes
1 Not used 
   
2AFront lid signalFront lid contact switch
   
3 Not used 
   
4 Not used 
   
5Eup to 1995_08 Screen/window monitoring, rear window as of 1995_09 Signal Interior protectionup to 1995_08 Rear defogger relay as of 1995_09 Interior protection control unit
   
6Eup to 1995_08 Screen/window monitoring, rear driver's side as of 1995_09 Not usedRear left window monitoring switch (DWA)
   
7Eup to 1995_08 Screen/window monitoring, rear passenger's side as of 1995_09 Not usedRear right window monitoring switch (DWA)
   
8AVehicle inclination signalTilt sensor
   
9 Not used 
   
10ARear lid open signalRear lid unlocking switch
   
11ARear lid open signalRear lid release switch (interior)
   
12ASignal, anti-jamming systemJamming protection switch, rear left window
   
13ACrash signalInertia switch
   
14ADrive-away protectionup to 1994_12 DME control unit as of 1995_01 Electronic immobilizer control unit (EWS)
   
15EWiper I activationWiper relay I
   
16EWiper II activationWiper relay II
   
17EHeadlight cleaner activationHeadlight washer module
   
18EIntensive wash activationHeadlight washer module
   
19ELED activationLED display DWA
   
20EVehicle inclination signalInclination sensor
   
21Eup to 1994_12 Activation, drive-away protection as of 1995_01 Not usedStarter relay
   
22 Not used 
   
23ESpeedometer (A) output signalIntegrated electronic control unit (IKE)
   
24ASignal, anti-jamming systemJamming protection switch, rear right window
   
25AIntermittent switching supplyWindscreen wiper switch
   
26MGroundGround connector
   

Pin assignments at plug connector X254

PinTypeDescription / Signal typeConnection /
Measuring notes
1MGroundGround connection
   
2AOpen window signalPower window motor, rear left
   
3ASoft-close drive signalMotor drive for rear lid servo lock
   
4ETerminal 30Fuse F29
   
5AOpen window signalPower window motor, rear right
   
6ALock signalZV motor drives, rear doors/tank flap
   
7AIncrease contact pressure signalADV motor
   
8Eup to 1995_08 Terminal 30 as of 1995_09 Not usedFuse F56
   
9AServotronic activationElectrohydraulic converter of servotronic
   
10ETerminal 30Fuse F6
   
11AServotronic activationElectrohydraulic converter of servotronic
   
12AClose window signalPower window motor, rear left
   
13ACentral arrest signalZV motor drives, rear doors
   
14AUnlock signalZV motor drives, rear doors/tank flap
   
15AClose window signalPower window motor, rear right
   
16AReduce contact pressure signalADV motor
   
17AHorn signalAntitheft horn (DWA)
   
18APump signalWasher pump
   
19ASignal, switch off consumer loadConnector, switch off consumer load
   
20AInterior lights signalConnector, interior lights
   

Pin assignments at plug connector X332

PinTypeDescription / Signal typeConnection /
Measuring notes
1ETerminal 30Fuse F55
   
2EInterior lights signalInterior/reading lamp, front
   
3EWindscreen wash signalWindscreen wiper switch
   
4EWindscreen wipe 2 signalWindscreen wiper switch
   
5EWindscreen wipe 1 signalWindscreen wiper switch
   
6EDoor contact signalRear RH door contact switch
   
7EDoor contact signalRear left door contact switch
   
8 Not used 
   
9EUnlock signalRear lid lock switch
   
10AIntensive wash activationHeadlight washer module
   
11ERear lid closed signalRear lid switch
   
12E/AK-bus signal lineK-bus connector
   
13Eup to 1995_08 Not used as of 1995_09 Central locking signalRemote control central locking
   
14MGroundGround connector
   
15EClose window signalRear left door power window switch
   
16EIntensive wash signalWindscreen wiper switch
   
17EOpen window signalRear right door power window switch
   
18EClose window signalRear right door power window switch
   
19ESignal soft-close automatic unlockMotor drive for rear lid servo lock
   
20ESignal, windscreen wipers in motionWiper motor
   
21ESignal, contact pressure control (ADV) operatedADV motor
   
22ELocked signalRear lid lock switch
   
23ETerminal RFuse F41
   
24EClose signalCentral locking (ZV) switch
   
25E/AP-bus signal lineP-bus connector
   
26EOpen window signalRear left door power window switch