2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1259
the Crankshaft Position Learn Procedure, DTC P0315 sets.
Conditions for Running the DTC
DTC P0315 runs continuously.
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 (See:
Starting and Charging/Testing and Inspection/Component Tests and General Diagnostics/Battery Inspection/Test).
Reference Information
Schematic Reference
Engine Controls Schematics (LAU) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)Engine Controls Schematics
(LF1) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)
Connector End Views
Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning)for scan tool information
Circuit/System Testing
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 (LF1) () procedure. The scan tool should display Learned Successful.
瀚慖f the Crankshaft Position 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 (See: Engine, Cooling and Exhaust/Engine/Service and
Repair/Overhaul/66. Crankshaft and Bearing Cleaning and Inspection).
* Interference in the signal circuit of the crankshaft position 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 crankshaft position system variation values and set DTC P0315
* Debris between the crankshaft position sensor and the reluctor wheel
2. Verify the Learn Procedure is successful.
瀚慖f the K20 ECM is unable to complete the learn procedure, replace the K20 ECM.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after using this diagnostic procedure.
Control Module References (See: Testing and Inspection/Programming and Relearning)for ECM replacement, setup, and programming
