Question about BMW Z3
The problem with checking to see or testing a camshaft sensor is this:
The output voltage of a properly operating camshaft position sensor switches from high (5.0 volts) to low (0.3 volts). By connecting an oscilloscope to the sensor output circuit, you can view the square wave pattern produced by the voltage swing
Posted on Apr 26, 2010
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Posted on Jan 02, 2017
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To completely test this sensor and circuitry, you need the DRBII scan tool, or equivalent. This is a test of the camshaft position sensor only.
For this test you will need an analog (non-digital) voltmeter. Do NOT remove the distributor connector. Using small paper clips, insert them into the backside of the distributor wire harness connector to make contact with the terminals. Do NOT damage the connector when inserting the paper clips. Attach the voltmeter leads to these clips.
Fig. Camshaft Position Sensor circuit schematic
Fig. Camshaft Position Sensor wires: (1) ORN (5v supply), (2) BK/LB (sensor ground), (3) TN/YL (camshaft position sensor signal)
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