A1 General module

Plug connector overview

Number X-pin, colour Description
X253 26-pin, black Plug connector B General module
X254 20-pin, black Plug connector C General module
X332 26-pin, black Plug connector A General module

Pin assignments at plug connector X253

Pin Type Description /Signal type Connection /Measuring notes
1 Not used
2 A Soft-close drive signal Boot lid servo motor
3 Not used
4 E Soft-close drive signal Boot lid servo motor
5 A Interior protection Interior protection control unit
6 Not used
7 A Interface signal RDC/DWA RDC control unit
8 A Vehicle inclination signal Tilt sensor
9 A Horn signal Antitheft horn (DWA)
10 E Rear lid open signal Rear lid unlocking switch
11 E Rear lid open signal Switching centre
12 E Signal, anti-jamming system Jamming protection switch, rear left window right-hand drive Jamming protection switch, rear right window
13 E Crash signal Airbag diagnostic module
14 Not used
15 E Wiper I activation Wiper relay
16 E Wiper II activation Wiper relay
17 A Headlight cleaner activation Headlight washer module
18 A Signal, child safety lock Relay, rear compartment backrest
19 E LED activation Electrochromic interior rear view mirror
20 A Inclination signal Tilt sensor
21 A Soft-close drive signal Close Boot lid servo motor
22 A Soft-close drive signal Open Boot lid servo motor
23 E Speed signal, rear ABS/DSC control unit
24 A Signal, anti-jamming system Jamming protection switch, rear right window right-hand drive Jamming protection switch, rear left window
25 E Signal, intermittent wipe Windscreen wiper switch
26 M Terminal 31 Ground connector

Pin assignments at plug connector X254

Pin Type Description /Signal type Connection /Measuring notes
1 M Terminal 31 Power ground Ground point
2 A Open window signal Power window motor, rear left right-hand drive Power window motor, rear right
3 A Signal, switch off consumer load Connector, switch off consumer load
4 E Terminal 30 Fuse F60
5 A Open window signal Power window motor, rear right right-hand drive Power window motor, rear left
6 A Central arrest signal ZV motor drives, rear doors
7 A Unlock signal Motor, bottom tailgate
8 Not used
9 A Servotronic activation Electrohydraulic converter of servotronic
10 E Terminal 30 Fuse F27
11 A Measuring resistor, Servotronic Electrohydraulic converter of servotronic
12 A Close window signal Power window motor, rear left right-hand drive Power window motor, rear right
13 A Lock ZV ZV motor drives, rear doors
14 A Unlock signal ZV motor drives, rear doors/tank flap
15 A Close window signal Power window motor, rear right right-hand drive Power window motor, rear left
16 A Activation, luggage compartment light Luggage compartment lights
17 A Activation, courtesy lighting Front zone lighting
18 A Pump signal Washer pump
19 A Signal, switch off consumer load Connector, switch off consumer load
20 A Interior lights signal Entry light module

Pin assignments at plug connector X332

Pin Type Description /Signal type Connection /Measuring notes
1 E Terminal 30 Fuse F14
2 E Interior lights signal Interior/reading lamp, front
3 E Windscreen wash signal Windscreen wiper switch
4 E Windscreen wipe 2 signal Windscreen wiper switch
5 E Windscreen wipe 1 signal Windscreen wiper switch
6 E Door contact signal Rear RH door contact switch, right-hand drive Rear left door contact switch
7 E Door contact signal Rear left door contact switch, right-hand drive Rear RH door contact switch
8 Not used
9 Not used
10 Not used
11 E Soft-close drive signal Boot lid servo motor
12 E/A K-bus signal line K-bus connector
13 E Central locking signal Electrochromic interior rear view mirror Remote control central locking
14 M Ground Ground connector
15 E Close window signal Rear left door power window switch right-hand drive Rear right door power window switch
16 E Intensive wash signal Windscreen wiper switch
17 E Open window signal Rear right door power window switch right-hand drive Rear left door power window switch
18 E Close window signal Rear right door power window switch right-hand drive Rear left door power window switch
19 E Signal, front lid contact Front lid contact switch
20 E Signal, windscreen wipers in motion Wiper motor
21 Not used
22 E Rear lid open signal Rear lid unlocking switch
23 E Terminal R Fuse F41
24 E Lock signal Hazard warning switch
25 E/A P-bus signal line P-bus connector
26 E Open window signal Rear left door power window switch right-hand drive Rear right door power window switch

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