P0315

DTC P0315

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions)provides an overview of each diagnostic category.

DTC Descriptor
DTC P0315 00
- Crankshaft Position System Variation Not Learned

Circuit/System Description

The crankshaft position sensor system variation learn feature is used to calculate reference period errors caused by slight tolerance variations in the crankshaft, and the crankshaft position sensor. The calculated error allows the engine control module (ECM) to accurately compensate for reference period variations. This enhances the ability of the ECM to detect misfire events over a wider range of engine speed and load.

The crankshaft position sensor system variation compensating values are stored in ECM memory after a learn procedure has been performed. If the actual crankshaft position sensor variation is not within the crankshaft position sensor system variation compensating values stored in the ECM, DTC P0300 00 may set.

If the crankshaft position sensor system variation values are not stored in the ECM memory, DTC P0315 00 sets.

Conditions for Running the DTC

* The engine is running.
* The DTC runs continuously.

Conditions for Setting the DTC

The crankshaft position sensor system variation values are not stored in the ECM memory.

Action Taken When the DTC Sets

DTC P0315 00 is a Type B code.

Conditions for Clearing the DTC

DTC P0315 00 is a Type B code.

Diagnostic Aids

This test procedure requires that the vehicle battery has passed a load test and is completely charged. Refer to Battery Inspection/Test (Battery Inspection/Test).

Reference Information
Schematic Reference

Engine Controls Schematics ([1][2]Electrical Diagrams)
Connector End View Reference

Component Connector End Views (Connector End Views By Name)
Electrical Information Reference

* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Powertrain Diagnostic Trouble Code (DTC) Type Definitions)
Scan Tool Reference

Control Module References (Programming and Relearning)for scan tool information

Circuit/System Testing

Note: The crankshaft position sensor system variation learn procedure may have to be repeated up to 5 times before the procedure is learned.

1. Perform the crankshaft position variation learn procedure. Refer to Crankshaft Position System Variation Learn (Testing and Inspection).
2. If the crankshaft position 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
* Interference in the signal circuit of the B26 Crankshaft Position 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 crankshaft position sensor system variation values and set DTC P0315 00
* Any debris between the crankshaft position sensor and the reluctor wheel

• If the ECM is still unable to complete the learn procedure, replace the K20 Engine Control Module.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

Control Module References (Programming and Relearning)