1990 bmw 525i general module issue

[dragonlore87]

I have a 1990 BMW 525I tht has a 0.5 amp draw tht goes away when I disconnect the general module and I am wondering what I can do to fix it and if it is save to be able to drive with it disconnected

[shogun]

sleeping draw should be <40mAmps
Maximum closed current by vehicle
E31 50mA
E32 50mA
E34 40mA
E36 30mA
E38 50mA
E39 40mA
E46 40mA
E52 50mA
E53 40mA
Z3 30mA

Performing Closed Current Draw Test
Select proper measuring device (DISplus, MoDic or DVOM). Remember amperage draw in excess of 10A will damage DVOM. Use inductive amp probe of DISplus when amperage draw is high.
When using DISplus inductive probe, clamp on negative battery cable with-arrow pointing away from battery. Switch off all consumers.(It is not necessary to disconnect B- from body when using inductive probe)
Connect (-) test lead to negative battery terminal and (+) test lead to a known good ground. Ensure all systems are OFF ! Be sure DVOM is on and set in proper mode. Disconnect battery ground lead from body.
Observe meter reading, wait for vehicle to enter sleep mode. Identify faulty circuit by disconnecting fuses, relays, control modules or connectors, observing meter readings.
Defective circuit is found when current is below maximum closed current for vehicle being tested.

use this link for more details http://www.e38.org/battery.pdf

[bmwdirtracer]

Yeah, what Shogun ^^^ said. Make sure that you roll the door locks with a screwdriver, so the car thinks everything's closed....and then start pulling fuses, one at a time, while your meter is hooked up. Of course, don't forget the rear fuse box. (I do not recall the E34 as having a hood switch; but if there is, it needs to be held closed, or have a jumper wire to complete the circuit. IF it has a hood switch, that switch is a very likely culprit, but since the hood opens backwards, I think they didn't use one. (My E34s never showed a "Hood Open" light.)

When you find the fuse that's responsible, have a look at the fuse diagrams in your ETMs:

http://wedophones.com/Manuals/BMW/19...g%20Manual.pdf

[shogun]

To make it easier, GM is ZKE = Zentrale Karosserie Elektronik = central chassis electronics, and that controls
wiper (and ADV wiper pressure for driver side, if installed)
washer window
washer headlights and foglights
crash sensor
door lock heating
central locking
electric windows
sunroof
interior lights

In case it has wiper pressure module, pull the black ADV relay under rear seat driver side, that often is a cause for trouble.

Central body electronics ZKE = GM pinout
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

This is from 5 Series - E34 (518i, 520i, 525td, 525tds, incl. touring) Schematics Model year 1994 Central body electronics (ZKE) Scheme 6100.0
more in detail https://download.bmwland.ru/valera/E...ow_ETM/6100.0/