Document ID: 2243108
2/22/22, 2:56 AM
Engine Controls and Fuel (ALL Diagnostic Trouble Codes ( DTC )) – ALLDATA Repair 2012 Chevy Truck Equinox AWD L4-2.4L
Vehicle > ALL Diagnostic Trouble Codes ( DTC ) > Testing and Inspection > P Code Charts > P0315 ENGINE CONTROLS AND FUEL
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 provide an overview of each diagnostic category.
DTC Descriptor
DTC P0315
Crankshaft Position System Variation Not Learned
Circuit/System Description
The crankshaft position variation learns 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 conditions.
The crankshaft position system variation compensating values are stored in ECM memory after a learn procedure has been performed and the ignition switch is turned to the OFF position for at least 30 s. If the actual variation is not within the crankshaft position system variation compensating values stored in the ECM, DTC P0300 may set.
If the crankshaft position system variation values are not stored in the ECM memory or a proper ECM power down does not occur after completing the Crankshaft Position Learn Procedure, DTC P0315 sets.
Conditions for Running the DTC
Engine is Running.
The DTC runs continuously when the above condition is met.
Conditions for Setting the DTC
The ECM detects that the crankshaft position system variation values are not stored in memory.
Action Taken When the DTC Sets
DTC P0315 is a Type A DTC.
Conditions for Clearing the MIL/DTC
DTC P0315 is a Type A DTC.
Diagnostic Aids
This test procedure requires that the vehicle battery has passed a load test and is completely charged. Refer to. Battery Inspection/Test
Reference Information
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
- Perform the scan tool Crankshaft Position Variation Learn procedure.
- Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed in the Freeze Frame/Failure Records data.
- Verify the DTC is not set.
⇒ If the DTC sets
Replace the K20 Engine Control Module.
⇓ If the DTC does not set - All OK
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
Control Module References for engine control module replacement, programming, and set up
ALLDATA
