Cleaning up and old harness is fun

[drift]

Pin number 9 is for tachometer goes to c104 ? in the glove box ( white flat-prong with 3 wire) Black wire is the one for tachmeter.
Round-plug with 4 wire = Oxygen sensor.

[Jean]

What about green wire?

[Jean]

Traced this green wire today, it controls one (tall square black one) of the 3 relays under the hood on the engine harness.

Since this harness will be removed along with the 3 relays, chassis will have 1 side of the 3 pin connector left in the car.

[Jean]

As I thought, the brown 2 pin activates the fan inside the ECU box in the e32/e34 cars.

Still researching the other 2/3.

[gregslow318i]

ok had a chance to go and look back at my notes and my adapter does not have a pin 13 but pin 14 ( i think you read the connector wrong ) and also the 3 wire plug in the glove box looks like it is the fuel pump out put from the relay to the pump its self. and the black lead looks like it is ether the tack signal to the cluster or the ac signal "on" to the dme. not to sure need to find a 318 in the jy and take a better look at it.

[Jean]

You have a 14 on the e34 side? hmmm.. I'll look through the ETM, but so far on 2 plugs I got it's 13. 13 is right below 1.

[gregslow318i]

You have a 14 on the e34 side? hmmm.. I'll look through the ETM, but so far on 2 plugs I got it's 13. 13 is right below 1.

no pin 14 on the e30 side

[Jean]

No pin 14 on my E30 side, it's an empty pin next to 17 (blue/white). I am going to try and call you again :)

[Jean]

Greg - http://forums.bimmerforums.com/forum....php?t=1156146

So only two relays, fuel pump relay is used also for o2 sensor heating sounds like. So my harness with 2 relays is okay after all, not missing a relay :)

"On 535i models the oxygen sensor heater relay is not used. The oxygen sensor heater is supplied with power from the fuel pump relay."

http://www.exx.se/maintenance/relays/electronics_box_text.jpg

On a random note - http://www.ls1tech.com/forums/conver...5-535-a-6.html

[Jean]

Alright this was fun... just gone through the 1989 525i - 535i ETM.pdf all 325 pages.

DME block diagram -


Fuel injector connections -


Diagnostics port -


First X20 connector

9 SW - instrument cluster engine speed input (tach)
12 GR - instrument cluster check control
1 BL - alternator
18 SW/GE - goes to pin 11 of D100 diagnostics plug (starter)
3 WS/SW - A200 DME unut to AEGS to check control
12 GR - check engine
5 BR/GN - oil pressure
4 BR/VI - coolant temp sender x1527 / B207
20 BR/GE - coolant temp sender X1527 / B207
7 GN - hot when switches from ignition switch
15 BR/SW - pin 42 from DME to instrument cluster check control
13 GN/VI - fuel pump to relay k201
3 WS/SW - Instrument cluster check control
19 GN/BL - goes to pin 18 of D100 diagnostics plug
14 SW/WS - instrument cluster check control veh. speed output?
8 SW/VI - on board comp
11 - WS/GN goes to pin 7 of D100
2 - BL/WS goes to B205 oil level
10 - BL/GE goes to B205 oil level

The Idle speed actuator wires
1 - WS/GN
2 - RT/WS
3 - WS/GE

O2 sensor wires
1 - GE goes to pin 10 of DME
2 - SW goes to pin 28 of DME
3 - GND
4 - GN/VI

B201 cylinder id
GE pin 31
SW pin 8

B202 engine speed sensor
GE pin 48
SW pin 47

AFM (b two o eight) X152B connector
1 GR/VI
2 GR/GE
3 GR/WS
4 GR/BL


Here is where it gets interesting... found the E-Box Fan. It's using Pin 6 (GN/WS) of X20 (goes to pin 16 of D100 diag port)...and then goes to X1552 connector pin 2 for the M201 E-Box FAN.
Pin 5 of X20 (BR/GN) goes to connector X1526 pin 1 of Oil Pressure Switch B206, and also goes (BR/GN) to pin 3 of X1552 connector. Pin 1 of the X1552 (BR color) goes to B210 Temp Switch connector X1551.

Diagram





I didn't find or maybe I missed? The black 8 pin connector (with the 7 pins)... I still have no idea what it is.... I tried to find something with 7 wires, but most automatic and abs stuff had either too few or too many. I wish I knew the name of the connector on the harness then I could look for it in the PDF.

[Jean]

Possibly this is the white 4 pin connector. X79








Black 8 pin is possibly X1537

Here is the only reference I found to it






Tomorrow I'll compare the pins against the wire colors...

[Pinepig]

If this thing doesn't fire up as soon as you turn the key after I spend my weekend holding your hand through the swap I'm gonna hold you down and let Cameron fuck you in the ass.

[Jean]

Shit! Lol, it will fire up even i have to my own damn wiring !!!

Need to make sure we torque that front crank nut and torque the head bolts to their final stage..

[gregslow318i]

am I on crack or am I reading this wrong? why does this diagram show 3 main relays?
but if you confirmed that there is only 2 relays? k201, k202 and last k203?

[gregslow318i]

oh wait that diagram is for a 525 not a 535.... I need to stop doing drugs lol jean I would be willing to bet you can just by pass the green wire at the c104(glov ebox) with the on that is going to the c103 (fuse box)