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Home >> Nissan-Datsun >> 1992 >> Sentra SE-R >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> Ignition Checks >> Direct Ignition System (Dis) >> Crank Angle Sensor
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Crank Angle Sensor

  1. If a fault is present in crank angle sensor, Code 11 may be set in ECU memory. If Code 11 is set, perform appropriate CODE 11 (CRANK ANGLE SENSOR) test in TESTS W/CODES article.
  2. To test crank angle sensor, leave sensor wiring connected. Using a logic probe or DVOM with an analog bar graph function, connect negative lead to ground and alternately connect positive lead to terminals No. 42 and 52 of ECU connector (1-degree input signal). Crank engine and note voltage pulse signals. For ECU connector terminal identification, see L - WIRING DIAGRAMS article.
  3. Alternately probe ECU connector terminals No. 41 and 51 (120-degree input signals). Crank engine and note voltage pulse signals.
  4. Peak voltage for 1-degree signal should measure about 2.5-2.7 volts on bar graph DVOM. Peak voltage for 120-degree signal should measure about 1.2-1.4 volts. If 1-degree or 120-degree signal is not present, check harness for short or open circuit. If no problems are found, replace crank angle sensor.
NOTE: It is possible to measure crank angle sensor voltage with a conventional DVOM (no bar graph function); however, it may not be easy to determine peak voltage signal due to averaging of digital signal.
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