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Home >> Subaru >> 2011 >> Legacy Premium, Automatic CVT >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Fuel Injection Fuel Systems (H4DOTC)) >> Crankshaft Position Sensor >> Inspection >> Crankshaft Position Sensor (Method With Oscilloscope)

Crankshaft Position Sensor (Method With Oscilloscope)

WARNING: This page is about a different variant/trim than selected.
  1. Prepare an oscilloscope.
  2. Remove the glove box lid assembly. Refer to GLOVE BOX .
  3. Connect the probe to ECM connector.
    Fig 1: Locating Glove Box Lid Assembly
    G06648245Courtesy of SUBARU OF AMERICA, INC.
    Fig 2: Connecting Probe To ECM Connector
    G07910742Courtesy of SUBARU OF AMERICA, INC.
    Terminal No. Probe
    17 +
    25 -
  4. Start the engine and let it idle.
  5. Check that the pattern is the same as the waveform and voltage shown below.
    Fig 3: Crankshaft Rotation Signal Waveform
    G07910743Courtesy of SUBARU OF AMERICA, INC.
  6. After inspection, install the related parts in the reverse order of removal.
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