Mazda CX-9 Grand Touring 2009 Manual page 1026

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Check for a loose crankshaft pulse
wheel.
Check the CKP sensor for damage.
Are the CKP sensor and crankshaft
pulse wheel normal?
INSPECT DAMPER AND PULLEY
ASSEMBLY
NOTE:
This step is for engines that have
damper mounted pulse rings.
Remove the front cover if necessary
to observe the crank pulley.
5
Observe the crank pulley for wobble.
Examine the El pulse ring fastened to
the harmonic dampener.
Does the crank pulley wobble or is the
pulse ring loose or damaged?
VERIFY TROUBLESHOOTING OF DTC
P0315 HAS BEEN COMPLETED
Verify that all disconnected connectors
are reconnected.
Turn the ignition switch to the ON
position (Engine off).
6
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
7
PROCEDURE". (See AFTER
REPAIR PROCEDURE [MZI-3.7].)
Are any DTC present?
DTC P0320 [MZI-3.7]
DTC P0320 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES
2008 Mazda CX-9 Grand Touring
No
Disconnect the negative battery terminal for 5
min to allow the PCM to learn the new profile.
Yes
Install a new pulley or damper assembly. Then
go to the next step.
No
Replace the PCM, then go to the next step. (See
Yes PCM REMOVAL/INSTALLATION [MZI-
3.7] .)
No
Go to the applicable DTC inspection. (See
Yes
DTC TABLE [MZI-3.7].)
No
Repair if necessary. Then go to Step 6.
Go to the next step.
Go to the next step.
Troubleshooting completed.