Circuit/System Testing
IMPORTANT:
The CKP System Variation Learn Procedure may have to be repeated up to 5 times before the procedure is learned for various reasons.
- Perform the CKP System Variation Learn Procedure. Refer to CKP System Variation Learn Procedure
. The scan tool should display Learned this Ignition.
- If the CKP System Variation Learn Procedure cannot be performed successfully, inspect for the following conditions:
- Any worn crankshaft main bearings
- A damaged reluctor wheel
- Excessive crankshaft runout
- A damaged crankshaft-Refer to Crankshaft and Bearings Cleaning and Inspection .
- Interference in the signal circuit of the CKP sensor
- The ignition switch is in the ON position until the battery is drained.
- An ECM power disconnect with the ignition ON that may have erased the stored value and set DTC P0315
- Any debris between the CKP sensor and the reluctor wheel