Hall Effect Sensor

WARNING: This page is about a different car, the 1990 Saab 9000 and 1990 Saab 900. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Make all checks at the back of electrical connectors for EZK electronic control unit (ECU) with ignition on.

To test sensor supply voltage, connect voltmeter between terminal No. 10 and 4 of ECU. See WIRING DIAGRAMS article. Voltmeter reading should be battery voltage.
To test signal from Hall Effect sensor to ECU, connect voltmeter between terminal No. 10 and 24 of ECU. See WIRING DIAGRAMS article. Slowly turn engine by hand. Voltmeter reading should vary from 0.4-3.0 volts as Hall Effect sensor shutter opens and closes.