Mazda CX-7 2007 Workshop Manual page 65

STEP
7 VERIFY TROUBLESHOOTING OF DTC P0011
COMPLETED
• Make sure to reconnect all the disconnected
connectors.
• Clear the DTC from the PCM memory using
the M-MDS.
• Turn the ignition switch off.
• Start the engine and warm it up completely.
• Is PENDING CODE for this DTC present?
8 VERIFY AFTER REPAIR PROCEDURE
• Perform the "After Repair Procedure".
(See 01-02-10 AFTER REPAIR
PROCEDURE[L3 WITH TC].)
• Are any DTCs present?
End Of Sie
DTC P0012[L3 WITH TC]
DTC P0012 CMP Timing over-retarded
• Actual valve timing is over-retarded by 5 ° (when the following conditions are met) from the target
valve timing for 5 s when the OCV system control is within the feed-back range.
MONITORING CONDITION
— Engine speed is below 4,000 rpm.
— Engine coolant temperature is above 70— 110 °C {158— 230 °F}.
Diagnostic support note
DETECTION
• This is a continuous monitor (CCM).
CONDITION
• MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in
one drive cycle while the DTC for the same malfunction has been stored in the PCM.
• PENDING CODE is available if the PCM detects the above malfunction condition during the first drive
cycle.
• FREEZE FRAME DATA is available.
• DTCs are stored in the PCM memory.
• OCV malfunction
• Low engine oil pressure
• Spool valve in OCV is stuck in the retard position.
• Variable valve timing actuator is stuck in the retard position.
• Following oil runners are clogged or have leakage.
POSSIBLE
Oil runners
CAUSE
• Between oil pressure switch and OCV
• Between OCV and variable valve timing actuator
• In variable valve timing actuator
• Loose timing chain or improper valve timing due to timing chain slippage
• PCM malfunction
Diagnostic procedure
STEP
1 VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED
• Has the FREEZE FRAME DATA been
recorded?
2 VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
• Check for related Service Bulletins and/or on-
line repair information availability.
• Is any related repair information available?
3 VERIFY RELATED PENDING CODE OR
STORED DTCS
• Is DTC P2088 or P2089 present?
4 VERIFY ENGINE OIL PRESSURE
• Start the engine.
• Does the oil pressure warning light illuminate?
ON-BOARD DIAGNOSTIC [L3 WITH TC]
INSPECTION
INSPECTION
Yes Replace the PCM, then go to the next step.
(See 01-40-6 PCM REMOVAL/INSTALLATION[L3 WITH
TC].)
No Go to the next step.
Yes Go to the applicable DTC inspection.
(See 01-02-13 DTC TABLE[L3 WITH TC].)
No Troubleshooting completed.
Yes Go to the next step.
No Record FREEZE FRAME DATA on the repair order, then go
to the next step.
Yes Perform the repair or diagnosis according to the available
repair information.
• If the vehicle is not repaired, go to the next step.
No Go to the next step.
Yes Go to the appropriate DTC troubleshooting procedure.
(See 01-02-188 DTC P2088[L3 WITH TC] or 01-02-190
DTC P2089[L3 WITH TC].)
No Go to the next step.
Yes Inspect engine oil pressure.
(See 01-11-2 OIL PRESSURE INSPECTION[L3 WITH
TC].)
No Go to the next step.
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