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Code 11 - Crankshaft Position Sensor

NOTE: Refer to illustration for connector and terminal identification. See Figure -Figure .
  1. Check ECM input signal by connecting oscilloscope at ECM connector E30, terminals No. 6 and 7. For voltage specifications, see appropriate pin voltage chart in the PIN VOLTAGE CHARTS article. If voltage is present, repair ECM harness connector or replace ECM as necessary. If voltage is not present, go to next step.
  2. Ensure ignition is off. Disconnect ECM and crankshaft position sensor connectors. Measure resistance between ECM connector E30, terminal No. 6 and crankshaft position sensor terminal No. 1 (Black wire). In addition, measure resistance between ECM connector E30, terminal No. 7 and crankshaft position sensor terminal No. 2 (White wire). In both cases, resistance should be maximum of 10 ohms. Measure resistance between ECM connector E30, terminals No. 6, 7 and 11, and ground. Resistance should be a minimum of one megohm at each terminal.
  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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