DTC P0315 [MZI-3.7]
DTC P0315 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES
z
Remove the radiator cap.
z
Implement the procedure to bleed air from the
engine coolant, then run the engine at idle.
z
Are there any small bubbles which make the
engine coolant white at filling opening?
NOTE:
z
Large bubbles are normal since they
are remaining air coming from the
engine coolant passage.
No
Go to the next step.
12
INSPECT ENGINE COMPRESSION
z
Inspect the engine compression. (See
COMPRESSION INSPECTION [MZI-
3.7]
.)
z
Is the engine compression normal?
Yes Go to the next step.
No
Overhaul the engine, then go to the next
step.
13
VERIFY TROUBLESHOOTING OF MISFIRE
DTC HAS BEEN COMPLETED
z
Verify that all disconnected connectors are
reconnected.
z
Turn the ignition switch to the ON position
(Engine off).
z
Clear the DTC from the PCM memory using
the M-MDS.
z
Start the engine and run it at idle.
z
Retrieve DTCs using the M-MDS.
z
Is the PENDING CODE for this DTC
present?
Yes
Replace the PCM, then go to the next
step. (See
PCM
REMOVAL/INSTALLATION [MZI-
3.7]
.)
No
Go to the next step.
14
VERIFY AFTER REPAIR PROCEDURE
z
Perform the "AFTER REPAIR
PROCEDURE". (See
AFTER REPAIR
PROCEDURE [MZI-3.7]
.)
z
Are any DTC present?
Yes
Go to the applicable DTC inspection.
(See
DTC TABLE [MZI-3.7]
.)
No
Troubleshooting completed.
DTC P0315
CKP system variation not learned
DETECTION
CONDITION
z
The PCM is unable to learn and correct for mechanical inaccuracies in the
crankshaft pulse wheel tooth spacing. This DTC disables the misfire
2008 Mazda CX-9 Grand Touring
2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:08:36 AM
Page 160
© 2005 Mitchell Repair Information Company, LLC.
