E32 730i m60 dme relay question

[G46]

Hi all,

I own a 92 e32 730i with a v8 (m60) engine

The previous owner seems to be saying that fuel pump has gone bad, he sold it to me in a good price (bargain price) i checked it before i bought it, seems to be no supply to the relay and fuse, i took it home, checked the wiring but no avail

Then i suspect the dme relay did not make contact, in other way, not giving signal to activate fuel pump relay.

I switched the relay with a similar numbered relay and pin configuration, now i can hear the dme activates by the dme relay clicks, also i checked for fuel pump fuse and relay, now it has supply.

The real question is, does it have anything to do with the tranny?

I got a message saying "transmission program" on the cluster, and then the "E" and "P,R,N,D,3,2,1" dissapears after a good 5-10 seconds

I also think that the previous owner cranks the hell out of it and bust the starter, i can hear the starter engage but not turning the starter.

[G46]

Ok guys,

I got a solution for you folks wanted to use normal 5 pin/4 pi relay (relay for hid commonly)

First you need a relay and its base

All will be the same
30 - constant 12v
85 - switch
86 - ground

87 - to the load, this is where u need to splice it into two..

This is due to bmw relay has two number 87 post. Which needs 12 input controlled by the ignition when its switched on

Normal 5 pin relay has 87a which is always hot when its not latched (normally closed)

By splitting pin 87 from normal relay into two. Basically it will feed both terminals 87 on the dme relay

You also can plug in directly a 5 pin relay, but underneath the original dme relay base ,u need to cut one wire and tap it into pin 87 ofthe original wiring.

I made it like this.. And will plug it in into the existing relay base
IMG20180404081921.jpg

[E32FAN]

Hi G46,
Greetings from Canada.
I can only see the V60 engine as E32 93/94, as I do not have access to the European ETMs.
I am not certain which relay you are calling the DME Relay. Can you see it here: http://www.armchair.mb.ca/%7Edave/BMW/e32/e32_93.pdf
Do you refer to K6300 on page 1362?
Cheers,
Steve

[G46]

Steve,

I will have a look when i have access to my computer, currently im using my phone to reply.

Will get back to u.

[shogun]

here are all relays from 1987 - 1994 http://www.e32-schrauber.de/bmw/s-relaisbelegung.htm

[G46]

here are all relays from 1987 - 1994 http://www.e32-schrauber.de/bmw/s-relaisbelegung.htm

unfortunately DME box wasnt in that link brother.

Hi G46,
Greetings from Canada.
I can only see the V60 engine as E32 93/94, as I do not have access to the European ETMs.
I am not certain which relay you are calling the DME Relay. Can you see it here: http://www.armchair.mb.ca/%7Edave/BMW/e32/e32_93.pdf
Do you refer to K6300 on page 1362?
Cheers,
Steve

steve, i believe it should be that one.

[E32FAN]

Hi all,

I also think that the previous owner cranks the hell out of it and bust the starter, i can hear the starter engage but not turning the starter.

I would replace the starter first. Nothing else matters if the starter is stopped.

Circuit shown on pages 1240-00, 01.

[G46]

I would replace the starter first. Nothing else matters if the starter is stopped.

Circuit shown on pages 1240-00, 01.

yes i send my car to mechanic to have the starter removed and inspected while i found locally a working starter.

now the real question is, based on the dme relay, if i modify it like i did on the normal relay. it should power up the fuel pump, am i correct? and all those circuit in both pin 87.

[E32FAN]

yes i send my car to mechanic to have the starter removed and inspected while i found locally a working starter.

now the real question is, based on the dme relay, if i modify it like i did on the normal relay. it should power up the fuel pump, am i correct? and all those circuit in both pin 87.

Yes, I agree that your modification seems correct. This is a SPST (single pole single throw) relay with dual 87 pins.

Now, the original relay has two contacts to share the loads while your mod has a single contact to carry the whole load.

So it would be best to source the proper relay with dual contacts and dual 87 pins. But you can safely test this relay modification briefly, I think.

[G46]

Yes, I agree that your modification seems correct. This is a SPST (single pole single throw) relay with dual 87 pins.

Now, the original relay has two contacts to share the loads while your mod has a single contact to carry the whole load.

So it would be best to source the proper relay with dual contacts and dual 87 pins. But you can safely test this relay modification briefly, I think.

i will have a try today after work, and will see if it gives power to the fuel pump relay.

will get back here tomorrow with results.

[E32FAN]

Your DME will not power your fuel pump until it sees pulses from your CPS sensor.

So the starter must be working first.

[G46]

Your DME will not power your fuel pump until it sees pulses from your CPS sensor.

So the starter must be working first.

so you are saying that it wont prime the pump? when the key is on acc position?

[shogun]

Here is some info on M1.1 and M1.3, basic functions are same for your 3.x for the V8 https://www.bimmerforums.com/forum/s...ic-1-1-1-3-BMW
When the ignition is switched on. the ECU briefly earths fuel pump relay contact 85 at ECU terminal 3. This energizes the relay winding, which closes the relay contact and connects voltage from terminal 30 to terminal 87, thereby providing voltage to the fuel pump circuit. After approximately one second, the ECU opens the circuit and the pump stops. This brief running of the fuel pump allows pressure to build within the fuel pressure lines, and provides for an easier start.

When I want to test the fuel pumps on my E32 750, I do it without ignition key/ignition on, I use a jumper cable and one end goes on the B+ post and the other end I hold briefly onto the top of fuse 23 for bank 1-6, and on fuse 24 for bank 7-12.
Then I can hear the fuel pumps running and test the fuel hoses before and after the test by squeezing them.
Here you can see the priming on an E46 fuel pump test for 3 seconds https://www.youtube.com/watch?v=mnFlidPRdRo

[G46]

Here is some info on M1.1 and M1.3, basic functions are same for your 3.x for the V8 https://www.bimmerforums.com/forum/s...ic-1-1-1-3-BMW
When the ignition is switched on. the ECU briefly earths fuel pump relay contact 85 at ECU terminal 3. This energizes the relay winding, which closes the relay contact and connects voltage from terminal 30 to terminal 87, thereby providing voltage to the fuel pump circuit. After approximately one second, the ECU opens the circuit and the pump stops. This brief running of the fuel pump allows pressure to build within the fuel pressure lines, and provides for an easier start.

When I want to test the fuel pumps on my E32 750, I do it without ignition key/ignition on, I use a jumper cable and one end goes on the B+ post and the other end I hold briefly onto the top of fuse 23 for bank 1-6, and on fuse 24 for bank 7-12.
Then I can hear the fuel pumps running and test the fuel hoses before and after the test by squeezing them.
Here you can see the priming on an E46 fuel pump test for 3 seconds https://www.youtube.com/watch?v=mnFlidPRdRo

Thanks Mr. Shogun for the philosophy explanation. somehow i just ordered two fuel pumps. just in case, since i have the 730i straight 6 and 730i V8.

My 730i straight 6
GA82
07/1990
Fuel pump part no: 16141178839

• compatible throughout 7' E32   (10/1985 — 03/1994)

My 730i V8
GD22
07/1992
Fuel pump part no: N/A @ realoem.

i suppose it will be the same. since the part no for GA82 is compatible throughout 1985-1994


also mechanic is working on the starter, i hope the starter can be serviceable and back into its service. or else, i can still source locally.

[shogun]

M30 has fuel pressure 3 bar, and the M60 has 3.5 bar, but should be no problem, the fuel pump 16141178839 makes 3.5 bar and conveying capacity is between 100-140 l/h depending on manufacturer.
Usully the fuel pumps have a higher pressure and the pressure to the fuel injectors is controlled by the fuel pressure regulator.