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Home >> Infiniti >> 1992 >> G20 Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> Ignition Checks >> DISTRIBUTORLESS Ignition System Checks (Q45) >> Crank Angle & Sub-Crank Angle Sensor Signal
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Crank Angle & Sub-Crank Angle Sensor Signal

  1. Remove crank angle sensor from engine. DO NOT disconnect crank angle sensor harness connector. Turn ignition on (engine off).
  2. Connect negative voltmeter lead to ground. Rotate crank angle sensor shaft slowly by hand. Connect positive voltmeter lead to crank angle sensor connector terminal No. 1 (90-degree signal). Voltage should fluctuate between 0 and 5 volts. Move voltmeter positive lead to terminal No. 2 (one-degree signal). Voltage should again fluctuate between 0 and 5 volts. See Fig 1 .
    Fig 1: Checking Crank Angle & Sub-Crank Angle Sensor Circuits (Q45)
    G90C18749Courtesy of NISSAN MOTOR CO., U.S.A.
  3. Set voltmeter to 100-mV AC scale. Connect positive voltmeter lead to terminal "a" and negative voltmeter lead to terminal "b" of sub-crank angle sensor terminal connector. See Fig 1 . Rotate crank angle sensor shaft slowly by hand; voltmeter should deflect. If voltmeter does not deflect, replace crank angle sensor.
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