issues, eml, throttle

[rapptorr]

Hello everyone I am new to the BMW world, and I have some real fun. 1991 535i fly by wire system (EML) here are the problems.

1. unable to do stomp test (have a CEL on)
2. EML light does not light with key to on (or ever)
3. can start while manually turning throttle body (will idle but does not run well)
4. no throttle response (zero) from accelerator pedal
5. I have a (Burnt insulation) 12-14g green wire going from the DME/ABS/EML electrical box rh fender (It has rubbed through the insulation and contacted the rear valve cover nut) it has 12v with key on.
it splices to another green wire (in the black wire tray that covers the fuel injectors) and runs back inside the vehicle (pretty sure) I have looked in the wiring diagrams but have been unable to determine what this wire does. Any ideas (eml)

Any ideas or suggestions appreciated. (I have read Shoguns site)

[shogun]

Hi, is the car US specification or different? Only US versions have the possibility to do the stomp test.
In case it is US version, try and try, the timing is important for stomping.


EML light does not light with key to on (or ever)
That you have to repair first.
BMW E32 EML Bulbs (http://bmwe32.masscom.net/johan/eml_bulb/eml_bulb.html)

clean the trottling body DK (throttling valve) Motor clean up (http://www.bimmerboard.com/forums/posts/632842/)

1991 wiring diagrams are here http://shark.armchair.mb.ca/~dave/BMW/e34/e34_91.pdf
maybe one of the electrnic wizzards can help you here regarding the burnt wires.

[rapptorr]

Hello, yes the car is US specific. I really have a hunch that the fried green wire (larger) (that contacted the rear valve cover nut) has something to do with the whole thing.
I have looked and looked at the diagrams I just cant seem to find that green wire and what it does.

[rapptorr]

As far as stomp test Im thinking that maybe the whole pedal system is dead? There is zero response to the motor while running. I will do some more testing tomorrow.

[shogun]

I found some info for you:

Bosch Motronic 1.1 and 1.3 55pin ecu


1 - timing control - to coil and O2 sensor
2 - Ground
3 - Fuel pump relay control
4 - Idle speed control
5 - Evaporative purge valve
6 - engine speed output - to instrument cluster
7 - AFM input - pin 2
8 - cyl. ID sensor input
9 - unused
10 - O2 sensor input
11 - unused
12 - AFM - reference output - pin 3
13 - RXO - diagnostic connector
14 - Ground
15 - Check engine light - to cluster
16 - injectors - 1,3,5
17 - injectors - 2,4,6
18 - Power input main relay
19 - Ground
20 - unused
21 - unused
22 - idle speed control
23 - O2 sensor heater
24 - Ground
25 - unused
26 - AFM common - ground pin 4
27 - Start input - to ignition switch and coil
28 - O2 input
29 - unused
30 - unused
31 - Cyl. ID sensor input
32 - Fuel rate output - to instrument cluster
33 - unused
34 - unsued
35 - unused
36 - Main relay
37 - Power input - to main relay
38 - unused
39 - Programing voltage - diagnostic conector
40 - A/C on input
41 - unused
42 - Park/ neutral input (auto only)
43 - unused
44 - AFM air inlet temp - pin 1
45 - coolant temp input
46 - unused
47 - Engine speed input
48 - Engine speed input
49 - unused
50 - unused
51 - unused
52 - Closed throttle input - pin 1
53 - WOT input - pin 3 Note - TPS pin 2 is ground
54 - unused
55 - TXD - diagnostic Connector

translate this from German. EML Module M30 pinout.
I posted that back in 2003 and just remembered triumph
Anschlussbelegung EML M30 (http://www.7-forum.com/forum/24/anschlussbelegung-eml-m30-16368.html)

[rapptorr]

Scratching my head here. Checked wire harness, no broken wires, pulled apart both computers DME and EML nothing obvious.
Fuses good. Pulled cluster leds for eml seem fine.

1. still no stomp test happening
2. cluster will not run self test
3. No eml light with key to on
4. throttle not moving

any suggestions? is there a way to activate the throttle from the eml computer pinout? Or directly to the throttle pins?

Thanks
Tom

[shogun]

did you repair the cluster EML light as per my above link? That do first. Changing the bulb does not help! You have to solder wires there. See link above.
Or find a spare one.

Did you disassemble the throttle body and clean it as per my above link? That is number 2 in your to do list

Because inside it could look like this one, that I found some years back and of course that will not work
ImageShack® - Online Photo and Video Hosting (http://imageshack.us/photo/my-images/812/dktake.png/)

and that is almost normal what you find if it has never been cleaned.

Testing data for the throttling valve are on my website under reference data.

[rapptorr]

1. cleaned throttle (did not look bad)
2. I will check continuity between those points on the cluster

what stops the cluster self test?

Thanks

[shogun]

not all cluster have self test, depends on the backplate color = built year
BMW E32 - 299960 (http://bmwe32.masscom.net/johan/299960/299960.html)
grey one: no self test
white one usually yes, but I have seen also these w/o working self test
blue one = always works

[rapptorr]

It is the blue one car is a 09-91 BMW 535i
I press right hand button on cluster for 3 seconds turn ignition to on, cluster does not self test, just lights up with normal lights (except eml) lol

[Tiger]

How long have you owned this car?

[rapptorr]

It is a theft recovery. So I have no history

[rapptorr]

1. ran wire and soldered on cluster, eml lights up and stays lit.
2. cleaned throttle (looked good)
3. still no throttle movement.
4. still no stomp test. (bad accelerator potentsiometer?)

[rapptorr]

DK does buzz when butterfly is gently pushed on.

[shogun]

DK should buzz always when ignition is on even if engine is not running, because then the DK motor should run on stand-by mode. Looks like something wrong with the DK?

[rapptorr]

I can hear it buzz when i touch the butterfly valve. Is there a test procedure for the DK pinout?

[rapptorr]

After the rewire to the eml leds on the cluster, eml lights come on and of course stay on.
1. cleaned DK (looks great) can hear it buzz while gently giving butterfly valve backfeed with finger.
2. still no throttle operation.
3. it will not start without someone outside physically operating the dk.
any ideas?

[shogun]

I only have the data for testing for the M70 throttle bodies DATA - SYSTEMS (http://twrite.org/shogunnew/data/controlsystems.html)
see DK input details, small PDF file

[Tiger]

Test your accelerator pedal and make sure it is working...