Crankshaft/camshaft position sensors
The crankshaft/camshaft position sensors on some models are located in this housing on the ignition distributor (arrow).
Connectors for connecting crankshaft / camshaft position sensors
1. Not used
2. Not used
3. Crankshaft position sensor mounted on the cylinder block
4. Camshaft Position Sensor 1998 Mazda Models
Examination
Sensor N1 (located on the ignition distributor)
1. Remove the ignition distributor and reconnect the larger of the two connectors.
2. Connect a voltmeter to terminals CKP1 and GRD. Rotating the distributor shaft, check that in one complete revolution the voltmeter needle deflected 4 times on models with a four-cylinder engine and 6 times on models with a 6-cylinder engine.
3. Replace the sensor if it is defective.
N2 sensor (located on the cylinder block)
4. Measure the gap between the sensor (indicated by an arrow) and gear wheel on the crankshaft. It should be 0.5–1.5 mm.
5. Check that the resistance between terminals A and B of the sensor connector is approximately 550 ohms. Replace sensor if necessary.
Replacement (N2 sensor)
1. Disconnect the negative battery cable.
2. Disconnect the sensor connector, unscrew the fixing bolts and remove the sensor.
3. Installation is carried out in the reverse order of removal.