2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1259

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