Volt

DTC P0315

The crankshaft position system variation learn feature is used to calculate reference period errors caused by slight build tolerance variations in the crankshaft position sensor, crankshaft, and crankshaft position sensor position. 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 wide range of engine speeds and load conditions. The ECM stores the crankshaft position system variation learn values after a learn procedure has been performed. If the actual crankshaft position system variation learn values are not stored within the crankshaft position compensating value look up table, then DTC P0300 may set. If the crankshaft position variation system learn values are not stored in the ECM memory, or a proper ECM power down does not occur after completing the Crankshaft Position System Variation Learn procedure, then DTC P0315 sets.

The diagnostic runs continuously when the vehicle is ON.

The ECM detects that the crankshaft position system variation learn values are not stored in memory.

DTC P0315 is a Type A code.

DTC P0315 is a Type A code.

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Description and Operation

Hybrid Modes of Operation Description

Electrical Information Reference

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Powertrain Diagnostic Trouble Code (DTC) Type Definitions

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Note: The Crankshaft Position 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 procedure. Refer to Crankshaft Position System Variation Learn .
2. If the Crankshaft Position System Variation Learn procedure cannot be performed successfully, inspect for the following conditions:

•	The Service Mode is active, until the battery is discharged

•	Interference in the signal circuit of the B26 crankshaft position sensor

•	An ECM power disconnect, with Vehicle in Service Mode, that may have erased the crankshaft position system variation values and set DTC P0315

•	Any debris between the crankshaft position sensor and the reluctor wheel

•	A damaged or misaligned reluctor wheel

•	Any worn crankshaft main bearings

•	Excessive crankshaft runout

•	A damaged crankshaft

⇒	If the ECM is still unable to complete the learn procedure, replace the K20 ECM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for ECM replacement, setup, and programming