Central body electronics (ZKE) pin assignment

Electrical troubleshooting manual (5 Series - E34 (518i, 520i, 525td, 525tds, incl. touring) Schematics Model year 1994)
5 Series - E34 (518i, 520i, 525td, 525tds, incl. touring) Schematics Model year 1994
Central body electronics (ZKE)
Scheme 6100.0

Pin Assignment
A=X253 26-pin, green
B=X254 26-pin, white
C=X255 26-pin, yellow
D=X332 5-pin, white
E=X258 20-pin, black
F=X259 20-pin, white

Pin Assignment X253
Pin Type Description/Function Connection
1 A Activation, FH relay in RM Relay module (RM) Pin E3
2 A Activation, FH relay in RM Relay module (RM) Pin E1
3 A Activation, wiper relay Relay module (RM) Pin F9
4 A Activation, TSH relay in RM Relay module (RM) Pin F17
5 A Activation, relay arrest Relay module (RM) Pin F4
6 not used
7 A Lock signal Rear lid lock switch
8 A OZV signal of ZV DWA module
9 A Crash information output Crash alarm generator
10 A Electronic power fuse Fuse relay
11 E Position signal Instrument cluster
12 E/A TxD diagnostic link Diagnostic connector
13 E Diagnostic link for ZV relay Relay module (RM) Pin E9
14 A Activation, SHD relay in RM Relay module (RM) Pin E4
15 A Activation, IA relay in RM Relay module (RM) Pin E2
16 A Activation, IB relay in RM Relay module (RM) Pin E7
17 A Activation, relay lock Relay module (RM) Pin F3
18 A Activation, relay unlock Relay module (RM) Pin F2
19 A Activation, SRA relay fog light SRA module
20 not used
21 not used
22 A Activation, washer pump relay Washer pump relay
23 E Crash sensor Inertia switch
24 A RxD diagnosis line Diagnostic connector
25 E Diagnosis line for wiper relay in RM Relay module (RM) Pin E10
Z6 E Diagnosis line for door lock heating Relay module (RM) Pin E19


Pin Assignment X254
Pin Type Description/Function Connection
1 not used
2 E Rear position sensor Position sensor
3 E Diagnostic link for FH/SHD relay in RM Relay module (RM) Pin E8
4 E FH switch, FH passenger's side rear open Power window switch (FH)
5 E FH switch, FH driver's side rear open Power window switch (FH)
6 E FH switch, FH passenger's side open Power window switch (FH)
7 E Rear end position sensor, driver's side End position sensor
8 E FH switch, FH passenger's side closed Power window switch (FH)
9 E End position sensor, passenger's door End position sensor
10 E FH switch, FH passenger's side rear closed Power window switch (FH)
11 E End position sensor, driver's door End position sensor
12 E FH switch, FH driver's side rear closed Power window switch (FH)
13 A Activation, FH relay in RM Relay module (RM) Pin E5
14 not used
15 not used
16 E Diagnostic link for FH/SHD relay in RM Relay module (RM) Pin E18
17 E SHD switch lift open Sunroof switch (SHD)
18 E SHD switch close Sunroof switch (SHD)
19 E SHD switch slide open Sunroof switch (SHD)
20 E FH switch, FH driver's side open Power window switch (FH)
21 E FH switch, FH driver's side closed Power window switch (FH)
22 E Rear end position sensor, passenger's side End position sensor
23 E FH switch, FH passenger's side rear closed Power window switch (FH)
24 E FH switch, driver's side rear closed Power window switch (FH)
25 A Activation, FH relay in RM Relay module (RM) Pin E7
26 A Activation, FH relay in RM Relay module (RM) Pin E6

Pin Assignment X255
Pin Type Description/Function Connection
1 E Passenger's door contact Door contact switch
2 E Driver's door handle contact Power window switch (FH)
3 E Rear door contact Door contact switch
4 E Switch stage 1 , 2, single wipe Wiper switch
5 E Switch position, intermittent wipe Wiper switch
6 E Switch position, wash Wiper switch
7 E Detection, lock Infrared module
8 E Switch position, intensive wash Wiper switch
9 E Terminal 15 for GM Fuse
10 E Terminal R for GM Fuse
11 E Detection, lock Central locking drive
12 not used
13 not used
14 E M Sedan: Front position sensor Touring: Ground Position sensor Ground connection
15 E Driver's door contact Door contact switch
16 E Detection, arrest/unlock Infrared module
17 E Detection, unlock Central locking drive
18 E Parking light detection Light switch
19 E Terminal 50 load cutout Starter
20 E Detection, lock Central locking drive
21 E Diagnosis line for SRA module Headlight washer system module
22 E Reset contact Wiper motor
23 E Detection, unlock Central locking drive
24 E Detection, arrest/unlock Lock contact, driver's/passenger's door
25 not used
26 E Detection, fog light Fog light switch


Pin Assignment X332
Pin Type Description/Function Connection
1 E B+ for GM electronics Relay module (RM) PinFS
2 E Ground for GM electronics Ground connection
3 not used
4 E Electronic fuse Fuse relay
5 E Electronic fuse Relay module (RM) PinF11


Pin Assignment X258
Pin Type Description/Function Connection
1 E Activation, FH relay in RM General module (GM) Pin A2
2 E Activation, FH relay in RM General module (GM) Pin A15
3 E Activation, FH relay in RM General module (GM) Pin A1
4 E Activation, SHD relay in RM General module (GM) Pin A14
5 E Activation, FH relay in RM General module (GM) Pin B13
6 E Activation, FH relay in RM General module (GM) Pin B26
7 E Activation, FH relay in RM General module (GM) Pin 25
8 A Diagnosis line for FH/SHD relay in RM General module (GM) Pin B3
9 A Diagnosis line for ZV relay General module (GM) Pin A13
10 A Diagnosis line for wiper and ZV relay General module (GM) Pin A25
11 A Activation, FH motor drives passenger's side Power window motor (FH)
12 A Activation, FH motor drives passenger's side Power window motor (FH)
13 A Activation, FH motor drives passenger's side Power window motor (FH)
14 A Activation, SHD motor Sunroof motor (SHD)
15 A Activation, FH motor driver's side Power window motor (FH)
16 A Activation, FH motor drives driver's side and SHD Power window/sunroof motor
17 A Activation, FH motor drives driver's side Power window motor (FH)
18 A Diagnosis line for FH/SHD relay in RM General module (GM) Pin B16
19 A Diagnosis line forTSH General module (GM) Pin B26
20 M Ground for power windows and SHD Ground connection

Pin Assignment X259
Pin Type Description/Function Connection
1 A Activation, actuator drives Central locking actuator drives
2 E Activation, relay unlock General module (GM) Pin A18
3 E Activation, relay lock General module (GM) Pin A17
4 E Activation, relay arrest General module (GM) Pin A5
5 A Terminal 30 for GM General module (GM) Pin D1
6 A Activation, IB lights Interior lights (IB)
7 E Activation, IB relay General module (GM) Pin A16
8 E Activation, wiper relay (stage 2) Wiper switch
9 E Activation, wiper relay (stage 1) General module (GM) Pin A3
10 M Ground for wiper and interior light Ground connection
11 E B+ for RM function circuits General module (GM) Pin D5
12 M Ground for central locking system Ground connection
13 A Activation, actuator drives Central locking actuator drives
14 A Activation, actuator drives Central locking actuator drives
15 E Terminal 30 for RM control circuits Fuse
16 A Activation, TSH heating Door lock heating (BH)
17 E Activation, TSH relay General module (GM) Pin A4
18 A B+ for wiper motor stage 1 Wiper motor
19 A B+ for wiper motor stage 2 Wiper motor
20 E Activation, wiper relay in RM Wiper relay

E = Input, A = Output, M = Ground