Crankshaft Position Sensor Adapter - solved

[Hallatauer]

OK.. this has me scratching my head.. I swapped in an engine harness from a 99 M3 into a 328is chassis that has an S52 engine. Also bought a new harness for the crankshaft sensor. 4 connections on the new harness. One at the sensor obviously... one connects to the vanos lead, one to the fuel injector rail and the fourth sits in the bracket under the intake manifold and connects into the engine harness/engine ecu... but that fourth connector from the engine harness isn't there. The harness I pulled from the car has it tho.

Any thoughts on this?

Harness.jpg

[Eric93se]

I can't remember but that adapter harness is supposed to provide sensor(s) with 12v instead of the 5v bmw originally intended. Now does that adapter go to both the cam and crank sensor? then the third would go to the rail for it's 12v source and the fourth would go to the DME?

[Hallatauer]

Yeah.. to the DME but this harness doesn't have a connector for it. Maybe has to do with it being a 1999?

[shogun]

There was a recall with a different harness, maybe that?
GROUP 12 12 10 99 Woodcliff Lake, N.J. July 1999 Engine Electrical Product Engineering - This Service Information bulletin supersedes S.I. 12 10 99 dated May 1999 which should be removed and discarded from your S.I. binder.
Perform the procedure outlined in this Service Information on all affected vehicles the next time they are in the shop for maintenance or repairs and on every affected vehicle prior to retail.
SUBJECT: Voluntary Emissions Recall Campaign No. 99E-A01
MODEL: E36 - 323i and 328i with M52 engine produced 6/95 - 12/98, E36 - M3 with S52 engine produced 1/96 - 12/98, E39 - 528i with M52 engine produced 3/96 - 8/98, Z3 - with M52 engine produced 7/96 - 9/98, Z3 - with S52 engine produced 1/98 - 1/99

Situation: BMW of North America, Inc. has initiated a Voluntary Emission-Recall Campaign to correct vehicles that may have a faulty crankshaft position sensor. A customer notification letter will be sent out by May 1999. This action will address the illumination of the "Check Engine"lamp and the following faults being set in the Engine Control Module (ECM/DME):
Fault Code 83 - Crankshaft position sensor
Fault Code 244 - Crankshaft segment timing
Cause: Internal failure of the sensor
Affected Vehicles: This recall involves E36,E39 and Z3 vehicles with M52 and S52 engines which were produced from 6/95 - 1/99.The procedure given in this bulletin must be performed on all affected vehicles identified on DCS. (A copy of the letter which will be sent to all affected customers in a staggered mailing is attached to this S.I.) In order to determine if a specific vehicle is affected by this Recall , it will be necessary to utilize the "Service Menu" of the DCS (Dealer Communication System). Based on the response of the system, either proceed with the corrective action or take no further action. The Chassis Number Ranges listed below are only for informational purposes and are not tobe considered as the only deciding factor.
Model Chassis Number Range: 328i/4 AV15000-AV25219 LB10002-LB10479; 328iA/4 AV35000-AV65890 LB30004-LB31291; M3 Conv. EC42001-EC43174; M3A Conv. EC38005-EC40502; M3/4 EE05001-EE09665; M3A/4 EE10002-EE14165; M3/2 EY72008-EY81023; 328i/2 ET00009-ET08059; 328iA/2 ET30015-ET38036; 328iC ET60003-ET67400; 328iCA ET90006-ET99999 EY85000-EY91136; 323i/2 EH40001-EH43356; 323iA/2 EH60002-EH63662; 323iC EA15000-EA18321; 323iCA EM20001-EM23874; 528i BV50010-BV56850; 528iA BW00026-BW49997 GT90000-GT97785; Z3 LC00020-LC16358; Z3A LB62000-LB63999 LG20000-LG20708; Z3 M coupe LC60010-LC60950; Z3 M roadster LC85002-LC89198

Correction: The crankshaft position sensor needs to be replaced with the same type of sensor that is currently being used on the M52TU engine. Along with replacing the sensor an adapterharness must also be installed in order to supply the sensor with a 12V operating voltage instead of the 5 volts currently being supplied by the DME. NOTE: SOME VEHICLES LISTED IN DCS MAY ALREADY HAVE THE NEW STYLE SENSOR INSTALLED, FOR THESE VEHICLES A CHECK/VERIFICATION WILL ONLY BE NEEDED.
Procedure: The following steps must be followed when replacing the original M52 crankshaft sensor withthe new M52TU sensor.
1. Remove the crankshaft positionsensor which is located below the starter motor. Remove the Sensor (1)
If the sensor currently installed in the vehicle has a connector directly on the sensor which can be disconnected, then the new sensor is already installed. No further action is required and the DCS contact can be closed.
Note: Illustration shows location of component with air filter housing and air mass meter removed. It is not necessary to remove these components to perform this repair.
2. The electrical connection of the crankshaft sensor to the engine harness is located below the intake manifold.
To access this connector, the cap of the oil filter housing ( should be removed and the oil filter and housing should then be covered to prevent dirt from getting onto the oil filter.
3. Disconnect the crankshaft position sensor (1) from the engine harness. Note: This illustration shows theplug connectors with the intake manifold removed. It is not necessary to remove the intake manifold in order to gain access to these connectors and complete this repair.
4. 4. Remove the fuel rail cover and unplug the VANOS solenoid valve plug connector (2).
5. 5. Install the new crankshaft position sensor (1) P/N 12 14 1 709 616and O-ring P/N 12 14 1 748 398.
6. Install adapter harness P/N 12 51 4 592 703.
a. Connect (1) to the new crankshaft position sensor.
b. Connect (2) to the engine harness connector which was previously connected to the old crankshaft sensor located below the intake manifold.
c. Connect (3) to the VANOS solenoid valve located on the VANOS unit.
d. Connect (4) to the engine wiring harness connector which previously connected directly to the VANOS solenoid valve.
7. After the adapter harness has been installed secure the harness lead going to the VANOS solenoid valve (1) to the VANOS oil line with 2 cable ties (3). Note: The harness lead going to the VANOS solenoid valve should not be under tension. The harness lead should be able to move.
Parts Information: Part Number.......... Description............. Qty.
......................12 14 1 709 616 Crankshaft position sensor 1
......................12 51 4 592 703.... Adapter harness.......... 1
......................12 14 1 748 398...... O - ring 17x3............ 1
......................61 13 1 377 134....... Cable tie................. 2
NOTE: The early style Crankshaft position sensors are no longer available from the Parts Department. Any retailer stock of Part Number 12 14 1 744 492 should be returned to your facing PDC using :
Return code: TEC 36 Order and invoice numbers do not need to be provided. Recall Label Instructions: After the vehicle has been checked and corrected, obtain a label (SD 92-124) and with a ball point pen print your dealer code (5 digits) on the Recall Completion Label (see illustration). An initial quantity of 100 labels will be sent to all BMW automotive centers. Peel the label from its backing and affix it to the left front strut tower (in the engine compartment) next to the Vehicle Emission Control Label.

For California centers only it is required by the California Code of Regulations that an executed orange "Vehicle Emission Recall - Proof of Correction" certificate (SD92-084, see illustration) be provided to each customer (for vehicles registered in the state of California) once the Recall on their vehicle has been completed. Note: Additional labels can be ordered from Product Engineering (a pre-printed order form is enclosed). Warranty Information: Reimbursement for this recall will be provided through campaign entry.
Defect Code: 00 12 27 01 00. Work Package #1: Replace crankshaft sensor & install adapter harness. Models: E36 - 323i/iA, 328i/iA and M3; E39 - 528i/iA; Z3. Labor Operation: 00 51 404, Labor Allowance: 11 FRU, Work Package #2: Check if new crankshaft sensor is already installed. Replacement not required. Models: E36 - 323i/iA, 328i/iA and M3,39 - 528i/iA, Z3. Labor Operation: 00 52 019 Labor Allowance: 3 FRU.
http://bavarian-board.com/uploads/kb...ion_Sensor.pdf

[Hallatauer]

Shogun,
That's the adapter harness that is in the car. It's the engine harness doesn't have a connector to the pigtail where it sits under the intake manifold.

[Hallatauer]

OK.. I figured it out. Since the 1999 harness was made after the sensor upgrade to 12v, it doesn't need the retro fit cable harness. There is a connector on it that goes straight to the crankshaft sensor, 12v and then vanos plugs into the fuel rail. She started right up! Idles a little high 850-900 rpms, but I think the throttle cable needs to be loosened up a little is all.
Thanks for bearing with me on this!

[Eric93se]

Good to know! Nice job!

[ephraimysl]

I think I’m having the same issue, did you leave the old cps and the 2 prong plug that connect to the main dme harness unplugged ?
Multi-Quote This Message

[shogun]

which engine + chassis # do you have? The SI refers to these models, engines and chassis number range: SUBJECT: Voluntary Emissions Recall Campaign No. 99E-A01
MODEL: E36 - 323i and 328i with M52 engine produced 6/95 - 12/98, E36 - M3 with S52 engine produced 1/96 - 12/98,
E39 - 528i with M52 engine produced 3/96 - 8/98,
Z3 - with M52 engine produced 7/96 - 9/98, Z3 - with S52 engine produced 1/98 - 1/99

Affected Vehicles: This recall involves E36, E39 and Z3 vehicles with M52 and S52 engines which were produced from 6/95 - 1/99. Model Chassis Number Range:
328i/4 AV15000-AV25219 LB10002-LB10479; 328iA/4 AV35000-AV65890 LB30004-LB31291;
M3 Conv. EC42001-EC43174;
M3A Conv. EC38005-EC40502;
M3/4 EE05001-EE09665;
M3A/4 EE10002-EE14165;
M3/2 EY72008-EY81023;
328i/2 ET00009-ET08059;
328iA/2 ET30015-ET38036;
328iC ET60003-ET67400;
328iCA ET90006-ET99999 EY85000-EY91136;
323i/2 EH40001-EH43356;
323iA/2 EH60002-EH63662;
323iC EA15000-EA18321;
323iCA EM20001-EM23874;
------------------------------------------------------
528i BV50010-BV56850;
528iA BW00026-BW49997 GT90000-GT97785;
Z3 LC00020-LC16358; Z3A LB62000-LB63999 LG20000-LG20708;
Z3 M coupe LC60010-LC60950; Z3 M roadster LC85002-LC89198

But look at the drawings I posted, there it says: install adapter harness P/N 12514592703.
a. Connect (1) to the new crankshaft position sensor.
b. Connect (2) to the engine harness connector which was previously connected to the old crankshaft sensor located below the intake manifold.
c. Connect (3) to the VANOS solenoid valve located on the VANOS unit.
d. Connect (4) to the engine wiring harness connector which previously connected directly to the VANOS solenoid valve.

http://bavarian-board.com/uploads/kb...ion_Sensor.pdf

[Hallatauer]

I bought a new CPS... with the updated harness, I believe there is now a unused connector at the main harness junction under the intake manifold. Where the CPS used to connect thru.