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Code 11: Crankshaft Position Sensor

NOTE: Refer to illustration for ECU connector and terminal identification. See Figure .
  1. Check ECU input signal by connecting oscilloscope at ECU connector E30 terminals No. 6 and 7. For voltage specifications, see appropriate pin voltage chart in PIN VOLTAGE CHART S article. If voltage is present, repair ECU harness connector or replace ECU as necessary. If voltage is not present, go to next step.
  2. Ensure ignition is off. Disconnect ECU and crankshaft position sensor connectors. Measure resistance between ECU connector E30, terminal No. 6 and ECU connector E14, terminal No. 1. In addition, measure resistance between ECU connector E30, terminal No. 7 and ECU connector E14, terminal No. 2. In both instances, resistance should be maximum of 10 ohms. Measure resistance between ECU connector E30 terminals No. 6, 7, 11, and ground. In all 3 instances, resistance should be minimum of one megohm.
  3. If resistances are not to specification, replace or repair harness or connector. If resistances are to specification, remove crankshaft position sensor. Put positive lead of oscilloscope at crankshaft position sensor terminal No. 1 (Black wire) and negative lead at terminal No. 2 (White wire). Check for a wave profile while passing a magnet near crankshaft position sensor pick-up coil.
  4. If a wave profile appears, check for problem between crankshaft position sensor and crankshaft sprocket. If a wave profile does not appear, replace crankshaft position sensor.
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