Mazda CX-9 Grand Touring 2009 Manual page 1024

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