DTC P0315 (LDD)
Diagnostic Instructions
DTC Descriptor
| DTC P0315 00: 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
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.
The crankshaft position sensor system variation compensating
values are stored in ECM memory after a learn procedure has been
performed. If the actual crankshaft position sensor variation is
not within the crankshaft position sensor system variation
compensating values stored in the ECM, DTC P0300 00 may set.
If the crankshaft position sensor system variation values are
not stored in the ECM memory, DTC P0315 00 sets.
Conditions for Running the DTC
| • |
The DTC runs
continuously |
Conditions for Setting the DTC
The crankshaft position sensor system variation values are not
stored in the ECM memory.
Action Taken When the DTC Sets
DTC P0315 00 is a Type B code.
Conditions for Clearing the DTC
DTC P0315 00 is a Type B code.
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
Schematic Reference
Engine Controls Schematics
Connector End View Reference
Component Connector End Views
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Testing
Note: The crankshaft
position sensor system variation learn procedure may have to be
repeated up to 5 times before the procedure is learned.
| 2. |
If the crankshaft position
variation learn procedure cannot be performed successfully, inspect
for the following conditions: |
| |
• |
Any worn crankshaft main
bearings |
| |
• |
A damaged or misaligned
reluctor wheel |
| |
• |
Excessive crankshaft
runout |
| |
• |
Interference in the signal
circuit of the B26 Crankshaft Position Sensor |
| |
• |
The ignition switch is left in
the ON position, until the battery is discharged |
| |
• |
An ECM power disconnect, with
the ignition ON, that may have erased the crankshaft position
sensor system variation values and set DTC P0315 00 |
| |
• |
Any debris between the
crankshaft position sensor and the reluctor wheel |
| ⇒ |
If the ECM is still unable to complete the learn
procedure, replace the K20 Engine Control Module. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
Control Module References
|
