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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 252 (Engine Control System & Fuel - 4.8L, 5.3L, 6.0L, Or 6.2L - DTC P0230 To DTC P0690) >> DTC P0315 >> Circuit/System Testing

Circuit/System Testing

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IMPORTANT: The CKP System Variation Learn Procedure may have to be repeated up to 5 times before the procedure is learned.
  1. Perform the CKP System Variation Learn Procedure. Refer to Crankshaft Position System Variation Learn .
  2. If the CKP System Variation Learn Procedure cannot be performed successfully, inspect for the following conditions:
    • Any 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 left in the ON position, until the battery is discharged
    • An ECM power disconnect, with the ignition ON, that may have erased the CKP system variation values and set DTC P0315
    • Any debris between the CKP sensor and the reluctor wheel
    • If the ECM is still unable to complete the learn procedure, replace the ECM.
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