To the top of the document
Spark
   
GMDE Start Page Load static TOC Load dynamic TOC Help?

DTC P0315 - Without FX3

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

DTC Descriptor

DTC P0315: 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 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 values after a learn procedure, which is performed automatically by the ECM. If the CKP system variation learn values exceed thresholds, DTC P0315 sets.

Conditions for Running the DTC
    •  The engine is running.
    •  The DTC runs continuously when the above conditions are met.

Conditions for Setting the DTC

The ECM detects 1 or 2 missing or additional tooth during one crankshaft revolution.

Action Taken When the DTC Sets

DTC P0315 is a Type C DTC.

Conditions for Clearing the DTC

DTC P0315 is a Type C DTC.

Reference Information

Schematic Reference

Engine Controls Schematics : Siemens ECM - LPG with LCP → Siemens ECM - Gas without FX3 or LCP → Delphi ECM - FX3

Connector End View Reference

Component Connector End Views

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information.

Circuit/System Testing
  1. Clear the DTC with a scan tool.
  2. Engage the parking brake, place the gear in park or neutral position.
  3. Start the engine. Depress the accelerator pedal to wide open throttle (WOT) above 5,500 RPM, then release the pedal.
  4. Ignition OFF for 30 seconds, repeat step 1 through step 4 twice.
  5. Verify the DTC P0315 is not set.
    6. ⇒If the DTC resets, inspect for the following conditions:
    • A worn or damaged crankshaft or crankshaft bearings
    • Debris between the CKP sensor and the reluctor wheel
    • A damaged reluctor wheel
    • Excessive crankshaft runout
    • Any interference of the CKP sensor or CKP sensor signal to the control module
  6. Repeat step 1 through step 4. If the ECM still sets the DTC, replace the K20 Engine Control Module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for engine control module replacement, setup, and programming.

   


© Copyright Chevrolet. All rights reserved