Crankshaft lead wiring

[trthrrt489]

Hello! I am wiring in a crank sensor but the wiring diagrams in the Bentley are different than what this lead has. Bentley was written before recall?

The new crank sensor is a 3 wire Hall effect with

VCC- Brown
Signal- Black
Ground- Blue

HALL SENSOR.PNG

The adapter has Brown/Yellow/, Red/wht wires

Y ADAPTER.PNG

The Bentley has the wiring. Yellow (Power), Brown (Ground), Black (signal)

E36 BENTLEY.PNG


Is the red/wht wire on the adapter the new VCC/Power wire?

[pbonsalb]

It is possible to mis wire the adapter harness. I’d have to go look at mine to remind myself, but study and think it through. The mis wiring as I recall is most likely at the front end rather than the rear crank sensor end.

[trthrrt489]

There is def a Red/White wire at the Crank sensor end. I have two leads and they are the same. I think the red/wht is the power/VCC wire. I'll wire it up and find out. This is the old lead wiring that worked for awhile.

LEAD.jpg
LEAD1.jpg
CHERRY SENSOR.jpg

[pbonsalb]

Test for 12V at the sensor. The adapter harness changes it from the original 5V that the ECU supplied. The very late 323, 328 and M3 harnesses integrate the adapter and don’t need the adapter harness. My 99 M3 did not have the updated harness and used the adapter. Anyway, if you have 12V at the crank sensor and not 5V, you have the wiring right.

[trthrrt489]

Test for 12V at the sensor. The adapter harness changes it from the original 5V that the ECU supplied. The very late 323, 328 and M3 harnesses integrate the adapter and don’t need the adapter harness. My 99 M3 did not have the updated harness and used the adapter. Anyway, if you have 12V at the crank sensor and not 5V, you have the wiring right.

Thanks Dude! That's what I needed to hear.

[LukeG]

What you working on JT???

[trthrrt489]

What you working on JT???

Not J.T. but we live in the same area. He is the G.O.A.T when it comes to cool turbo things.

[LukeG]

Not J.T. but we live in the same area. He is the G.O.A.T when it comes to cool turbo things.

Oops! I logged back in after YEARS of idle and confused screen names!

[Colby Colbs]

Why change the stock sensor? Works awesome. And yes the adapter was to power it with 12v when they made the recall and changed from 5v supply.

Sent from my SM-S908U using Tapatalk

[trthrrt489]

Why change the stock sensor? Works awesome. And yes the adapter was to power it with 12v when they made the recall and changed from 5v supply.

My PnP unit was made when I was OBD2 using an S52 with the crank sensor in the rear. When I went to the M50 long block everything moved to the front. It's making OBD1 sensors/hardware work with OBD2 wiring.

I bought the Cherry hall effect sensor so I figured I'd use it.

Also, the Red/Wht is the VCC/Power, Brown is ground, and Yellow is signal. Just in case it comes up again.

[pbonsalb]

Apparently Euro OBD2 328i used an OBD1 style sensor on the crank pulley. I have a friend who used an M50 block without the rear hole so he could not easily fit the sensor to read the S52 crank, and converted to the Euro setup.