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Circuit/System Testing

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: The CKP System Variation Learn Procedure may have to be repeated up to 5 times before the procedure is successful.
  1. Perform the Crankshaft Position System Variation Learn . The scan tool should display Learned this Ignition.
  2. If the CKP System Variation Learn Procedure cannot be performed successfully, inspect for the following conditions:
    • Worn crankshaft main bearings
    • A damaged or misaligned reluctor wheel
    • Excessive crankshaft runout
    • A damaged crankshaft-Refer to Crankshaft and Bearing Cleaning and Inspection .
    • Interference in the signal circuit of the CKP sensor
    • The ignition switch is in the ON position until there is insufficient system voltage.
    • An ECM power disconnect with the ignition ON that may have erased the CKP system variation values and set DTC P0315
    • Debris between the CKP sensor and the reluctor wheel
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