Circuit/System Testing
IMPORTANT:
The CKP System Variation Learn Procedure may have to be repeated up to 5 times before the procedure is successful.
- Perform the CRANKSHAFT POSITION SYSTEM VARIATION LEARN . The scan tool should display Learned this Ignition.
- 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
- If the control module is unable to complete the learn procedure, replace the control module.