DTC P0022 [MZI-3.7]
DTC P0022 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES
DIAGNOSTIC PROCEDURE
DTC P0022 (MZI-3.7) DIAGNOSTIC PROCEDURE
5
VERIFY TROUBLESHOOTING OF
DTC P0021 HAS BEEN COMPLETED
z
Make sure to reconnect all
disconnected connectors.
z
Clear the DTC from the PCM memory
using the M-MDS.
z
Turn the ignition switch off.
z
Start the engine and warm it up
completely.
z
Is the same 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.
6
VERIFY AFTER REPAIR PROCEDURE
z
Perform the "AFTER REPAIR
PROCEDURE".
(See
AFTER REPAIR
PROCEDURE [MZI-3.7]
.)
z
Are any DTCs present?
Yes Go to the applicable DTC inspection. (See
DTC
TABLE [MZI-3.7]
.)
No
Troubleshooting completed.
DTC P0022
CMP timing over-retarded (LH)
DETECTION
CONDITION
z
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.
POSSIBLE
CAUSE
z
OCV (LH) malfunction
z
Low engine oil pressure
z
Spool valve in the OCV (LH) is stuck in retard position
z
Improper valve timing due to timing chain slippage
STEP
INSPECTION
ACTION
1
VERIFY FREEZE FRAME DATA HAS
BEEN RECORDED
z
Has FREEZE FRAME DATA been
recorded?
Yes Go to the next step.
No
Record FREEZE FRAME DATA on the
repair order, then go to the next step.
VERIFY RELATED REPAIR
2008 Mazda CX-9 Grand Touring
2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:08:34 AM
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© 2005 Mitchell Repair Information Company, LLC.
