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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 the engine and note voltage pulse signals. For ECU connector terminal identification, see appropriate diagram in 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 the "averaging" of digital signal.
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