Mazda CX-9 Grand Touring 2009 Manual page 905

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
VERIFY TROUBLESHOOTING OF
DTC P0021 HAS BEEN COMPLETED
Make sure to reconnect all
disconnected connectors.
Clear the DTC from the PCM memory
5
using the M-MDS.
Turn the ignition switch off.
Start the engine and warm it up
completely.
Is the same DTC present?
VERIFY AFTER REPAIR PROCEDURE
Perform the "AFTER REPAIR
PROCEDURE".
6
(See AFTER REPAIR
PROCEDURE [MZI-3.7].)
Are any DTCs present?
DTC P0022 [MZI-3.7]
DTC P0022 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES
DTC P0022 CMP timing over-retarded (LH)
DETECTION
CONDITION
POSSIBLE
CAUSE
DIAGNOSTIC PROCEDURE
DTC P0022 (MZI-3.7) DIAGNOSTIC PROCEDURE
STEP
VERIFY FREEZE FRAME DATA HAS
BEEN RECORDED
1
Has FREEZE FRAME DATA been
recorded?
VERIFY RELATED REPAIR
2008 Mazda CX-9 Grand Touring
The PCM monitors the variable valve timing position for over-retarded
camshaft timing. The test fails when the camshaft timing exceeds a maximum
calibrated value or remains in a retarded position.
OCV (LH) malfunction
Low engine oil pressure
Spool valve in the OCV (LH) is stuck in retard position
Improper valve timing due to timing chain slippage
INSPECTION
Replace the PCM, then go to the next step. (See
Yes PCM REMOVAL/INSTALLATION [MZI-
3.7] .)
No Go to the next step.
Go to the applicable DTC inspection. (See DTC
Yes
TABLE [MZI-3.7].)
No Troubleshooting completed.
Yes Go to the next step.
Record FREEZE FRAME DATA on the
No
repair order, then go to the next step.
ACTION