Campaign - Crankshaft Position Sensor Replaced

Group 12
Engine Electrical Systems

Bulletin Number
12 10 99

Woodcliff Lake, NJ
March 1999
Product Engineering

SUBJECT:
M52 Crankshaft Position Sensor

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:
The "Check Engine" lamp is illuminated and the following faults can be set in the Engine Control Module (ECM/DME):

Fault Code 83 - Crankshaft sensor

Fault Code 244 - Crankshaft segment timing

Cause:
Internal failure of the sensor

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 adapter harness must also be installed in order to supply the sensor with a 1 2V operating voltage instead of the 5 volts currently being supplied by the DME.

Procedure: The following steps must be followed when replacing the original M52 crankshaft position sensor with the new M52TU sensor.

1. Switch off the ignition.




2. Remove the crankshaft position sensor which is located below the starter motor.

Unscrew bolt 01.

Remove the Sensor 02.

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.




3. The electrical connection of the crankshaft position sensor to the engine harness is located below the intake manifold.

To access this connector, the cap of 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.




4. Disconnect the crankshaft position sensor 02 from the engine harness.

Note:
This illustration shows the plug 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.




5. Remove the fuel rail cover and unplug the VANOS solenoid valve plug connector 04.




6. Install the new crankshaft position sensor (1) P/N 12 14 1 709 616 and O-ring P/N 12 14 1 748 398.




7. Install adapter harness P/N 12 51 4 592 703.

a. Connect (1) to the new crank position sensor.

b. Connect (2) to the engine harness connector which previously connected to the 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.




8. After the adapter harness has been installed secure the harness lead (3) going to the VANOS solenoid valve (4) to the VANOS oil line with 2 cable ties (5).

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:
Description Part Number Qty.
Crankshaft position sensor 12 14 1 709 616 1
Adapter harness 12 51 4 592 703 1
O-ring 17x3 12 14 1 748 398 1
Cable tie 61 13 1 377 134 2

Warranty Information: Parts and labor will be reimbursable under the terms of the applicable BMW Emissions or New Vehicle Limited Warranty.

Defect Code: 00 12 27 01 00

Labor Operation: 00 51 404 Replace crankshaft position sensor and install adapter harness.

Labor Allowance: 11 FRU