Examination
To test, disconnect the appropriate engine wiring harness connectors.
Measure the resistance between the corresponding sensor connector pins and, if necessary, replace the sensor.
Setpoints at +20°C:
Pulse sensor on the crankshaft:
- 316i, 318i: 0.5 com;
- 318is/ti, 320i, 325i, 328i: 1.3 com.
Cylinder recognition sensors (All): between pins 1 and 2 of connectors: 1 ohm maximum; between pins 2 and 3: more than 10 mΩ.
Removing the crankshaft sensor
Four-cylinder engine: Remove the radiator fan.
Connectors: 1 cylinder identification sensor; 2 pulse generator DME.
Unplug connector -2- from cable duct. The illustration shows a four-cylinder engine, on a six-cylinder engine, the connectors are located in the same order next to the oil dipstick mount.
Pull the sensor wires out of the guides. On a six-cylinder engine, to do this, remove the cover -1- (Drawing W 10156).
Loosen the crankshaft pulley bolt and remove the sensor with cover.
Installation
Insert the sensor and tighten the screw with a tightening torque of 10 Nm.
Check the distance of the sensor from the gear with a feeler gauge. Set value: 0.7-1.0 mm.
Carefully lay the connecting wires in the guides so that they do not rub against the V-belt. Connect connector.
Removing the cylinder identification sensor
Models 320i, 325i, 328i since September 1992: The sensor is difficult to access. Therefore, first remove the solenoid valve connector of the VANOS actuator and unscrew the valve.
Models 318i, 318i from September 1993, 318is/ti, 320i, 3251, 328i: Loosen bolt -3- on cylinder head and remove sensor.
Models 316i, 318i before August 1993:
Remove the ignition distributor cap.
Disconnect the ignition cable for cylinder 4 at the ignition distributor.
Use side cutters to remove the angled connector from this ignition wire.
Note: A special tool is required to install a new connector.
Disconnect the induction loop of the sensor from the wire.
Pull the sensor wire out of the guide.
Disconnect the sensor connector.
Installation
Insert sensor. Ensure correct installation of the sensor rubber gasket, if necessary, replace the gasket.
Models 316i, 318i before August 1993: Reassemble the ignition wires and install the distributor cap.
Models 320i, 325i, 328i from September 1992: Screw in the solenoid valve of the VANOS device, if necessary, first replace the damaged gasket. Connect electrical connector.