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Home >> Saab >> 1993 >> 900 Commemorative >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> Ignition Checks >> EZK Ignition System (900 Series) >> Hall Effect Sensor
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Hall Effect Sensor

  1. Make all checks at back of electrical connectors for ignition Electronic Control Module (ECM) with ignition on.
  2. To test sensor supply voltage, connect voltmeter between terminals No. 10 and 4 of ECU on 900 Series, or terminals No. 6 and 15 on 9000 Series. See th eWIRING DIAGRAMS article in this section. Battery voltage should exist.
  3. To test signal from Hall Effect sensor to ECM, connect voltmeter between terminals No. 10 and 24 of ECM on 900 Series, or terminals No. 15 and 23 on 9000 Series. See the WIRING DIAGRAMS article in this section. Slowly turn engine by hand. Voltmeter indication should vary from 0.4-3.0 volts as Hall Effect sensor shutter opens and closes.
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