Mazda CX-7 2007 Workshop Manual page 64

DTC P0011[L3 WITH TC]
DTC P0011 CMP Timing over-advanced
• Actual valve timing is over-advanced by 17 ° (when the following conditions are met) from the target
valve timing when the OCV is controlled at the maximum valve timing retard condition.
MONITORING CONDITION
— Engine speed is below 4,000 rpm.
— Engine coolant temperature is above 70— 110 °C {158— 230 °F}.
Diagnostic support note
• This is a continuous monitor (CCM).
DETECTION
CONDITION
• The 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
• Spool valve in the OCV is stuck in the advance position.
POSSIBLE
• Variable valve timing actuator is stuck in the advance position.
CAUSE
• 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 TIMING CHAIN INSTALLATION
• Stop the engine.
• Remove the timing chain cover.
• Is the camshaft timing mark at the correct
point?
(See 01-10-10 TIMING CHAIN REMOVAL/
INSTALLATION[L3 WITH TC].)
4 INSPECT OCV FOR MALFUNCTION
• Start the engine.
• Increase the engine speed.
• Stop the engine.
• Remove the OCV.
• Inspect the position of the spool valve in the
OCV.
• Is the spool valve located at the valve retard
position?
5 INSPECT STOPPER PIN MECHANISM
• Remove the timing chain.
• Inspect the stopper pin.
(See 01-10-27 VARIABLE VALVE TIMING
ACTUATOR INSPECTION[L3 WITH TC].)
• Is the stopper pin mechanism normal?
6 INSPECT ROTOR POSITION
• Remove the variable valve timing actuator.
• Is the rotor position at the maximum valve
timing retard?
01-02–22
2007 Mazda CX-7 Workshop Manual (1871–1U–06B)
ON-BOARD DIAGNOSTIC [L3 WITH TC]
INSPECTION
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 next step.
No Reinstall the timing chain, then go to Step 7.
Yes Go to the next step.
No Replace the OCV, then go to Step 7.
Yes Go to the next step.
No Replace the variable valve timing actuator, then go to Step
7.
Yes VARIABLE VALVE TIMING MECHANISM IS NORMAL
Note
• This DTC is detected as an intermittent concern.
• The intermittent concern might be removed using the
cleaning mode of the variable valve timing control
function.
Go to the next step.
No Replace the variable valve timing actuator, go to the next
step.
Revised 8/2006 (Ref. No. R087/06)
id010239801600
ACTION