Crank Angle Sensor
- 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.
- 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 (one-degree input signal). Crank the engine and note voltage pulse signals. For ECU connector terminal identification, see L - WIRING DIAGRAMS article.
- Alternately probe ECU connector terminals No. 41 and 51 (120-degree input signals). Crank engine and note voltage pulse signals.
- Peak voltage for one-degree signal should measure about 2.3-2.8 volt on bar graph DVOM. Peak voltage for 120-degree signal should measure about .1-.4 volt. If one-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.