A1 General module control unit

Connector location views

Number X-pin, colour Description
X253 54-pin, black Plug connector General module control unit
X254 26-pin, black Plug connector General module control unit
X332 15-pin, black Plug connector General module control unit

Pin assignments at plug connector X253

Pin Type Description /Signal type Connection /Measuring notes
1 E Signal, wiper switch 1 Windscreen wiper switch
2 Not used
3 E Signal, wiper switch 2 Windscreen wiper switch
4 E Signal, front passenger's power window switch, open Passenger's door power window switch
5 E Signal, driver's power window switch, open Switch block, driver's door
6 E Signal, boot lid button open from inside Rear lid release switch (interior)
7 E Signal, centerlock button Hazard warning/central locking switch
8 E Signal, interior light switch, continuous operation Interior/reading lamp, front
9 E/A K-bus signal K-bus connector
10 M Ground Ground point
11 A Signal, wiper relay Wiper relay
12 A Signal, headlight washer pump relay Headlight washer module
13 A Motor signal, ZV unit lock driver's door System lock, driver's door
14 A Motor signal, ZV unit central arrest System lock, rear passenger's side
15 A Motor signal, ZV unit central arrest System lock, rear driver's side
16 A with remote control: Motor signal, ZV unit central arrest System lock, passenger's door
17 A Motor signal, unlock boot lid Central locking drive, boot lid/tailgate
18 E Signal Interior light Connector Interior light
19 E Signal, wash switch Windscreen wiper switch
20 E Signal, unlock driver's door System lock, driver's door
21 Not used
22 E Signal, lock driver's door System lock, driver's door
23 E Signal, rear passenger's side door contact System lock, rear passenger's side
24 E Signal, rear driver's side door contact System lock, rear driver's side
25 E Signal, front passenger's door contact System lock, passenger's door
26 E Signal, driver's door contact System lock, driver's door
27 E Terminal R Fuse F9
28 E Signal, anti-trapping strip, driver's door Jamming protection switch, driver's side
29 E Signal, anti-trapping strip, front passenger's door Jamming protection switch, passenger's side
30 A Signal, wiper relay for speed 2 Wiper relay
31 Not used
32 A Motor signal, ZV unit central arrest System lock, driver's door
33 A with remote control: Motor signal, ZV unit unlock System lock, passenger's door
34 A Signal, central locking motor, unlock System lock, rear driver's side
35 A Motor signal, ZV unit unlock Central locking drive, fuel filler flap
36 A Motor signal, ZV unit unlock System lock, rear passenger's side
37 E Motor signal, lock boot lid Rear lid lock switch
38 Not used
39 Not used
40 E Switch signal, passenger's window regulator closed Passenger's door power window switch
41 E Signal, driver's power window switch, closed Switch block, driver's door
42 E Signal, boot lid contact Central locking drive, boot lid/tailgate
43 Not used
44 E Signal, boot lid button, open Licence plate lights
45 E Signal Return contact, wiper rest position Connector Return contact, wiper rest position
46 E Signal, potentiometer for interval time Windscreen wiper switch
47 E Terminal 30 Fuse F49
48 A/E LIN-bus Connector LIN-bus
49 E Signal, data line ZV remote control Electrochromic interior rear-view mirror Remote control central locking
50 A Motor signal, ZV unit central arrest Central locking drive, fuel filler flap
51 A Motor signal, ZV unit unlock System lock, driver's door
52 A Motor signal, ZV unit lock System lock, rear passenger's side
53 A Motor signal, ZV unit lock System lock, rear driver's side
54 A with remote control: Motor signal, ZV unit lock System lock, passenger's door

Pin assignments at plug connector X254

Pin Type Description /Signal type Connection /Measuring notes
1 E Signal, rear passenger's side power window switch, closed Power window switch, rear right
2 E Signal, rear driver's side power window switch, closed Switch block, driver's door
3 E Signal, rear passenger's side power window switch, closed Passenger's door power window switch
4 E Signal, rear driver's side power window switch, closed Power window switch, rear left
5 E Signal, status of antitheft alarm system Tilt monitoring
6 A Signal, tilt alarm sensor Tilt monitoring
7 E Signal, front lid contact Front lid contact switch
8 A Control signal, DWA siren alarm Horn for antitheft alarm system
9 Not used
10 E Motor signal, unlock boot lid Rear lid lock switch
11 Not used
12 E Signal, anti-trapping strip, rear passenger's side Jamming protection switch, rear right window
13 Not used
14 E Signal, rear driver's side power window switch, open Switch block, driver's door
15 E Signal, rear passenger's side power window switch, open Passenger's door power window switch
16 E Signal, rear driver's side power window switch, open Power window switch, rear left
17 E Signal, rear passenger's side power window switch, open Power window switch, rear right
18 Not used
19 Not used
20 Not used
21 E Signal, child safety lock window regulator Switch block, driver's door
22 A Signal, switch off consumer load Connector Load cutout
23 A Signal, DWA LED Electrochromic interior rear-view mirror
24 E Signal, interior protection Control unit, interior protection I
25 Not used
26 E Signal, anti-trapping strip, rear driver's side Jamming protection switch, rear left window

Pin assignments at plug connector X332

Pin Type Description /Signal type Connection /Measuring notes
1 E Supply for interior lights, washer pump, tailgate/rear lid release and load cutout Fuse F52
2 A Signal, washer pump Washer pump
3 A Signal, switch off consumer load Connector Load cutout
4 A Signal, rear driver's side power window motor, closed Window regulator motor, rear left
5 A Signal, rear passenger's side power window motor, closed Window regulator motor, rear right
6 A Signal, front passenger's power window motor, open Passenger's window motor
7 A Signal, driver's power window motor, open Driver's window motor
8 E Supply, front window regulator Fuse F48
9 E Supply, central locking system Fuse F60
10 E Supply, rear window regulator Fuse F71
11 A Signal, rear driver's side power window motor, open Window regulator motor, rear left
12 A Signal, rear passenger's side power window motor, open Window regulator motor, rear right
13 A Signal, front passenger's power window motor, closed Passenger's window motor
14 A Signal, driver's power window motor, closed Driver's window motor
15 M Load ground, central locking and window regulators Ground point

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