Mazda 3 - Page 48

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
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48
• Verify related service repair
information availability.
• Is any related repair information
available?
No
Go to the next step.
3
VERIFY ENGINE OIL PRESSURE
• Start the engine.
• Does the oil pressure warning light
illuminate?
Yes
Inspect engine oil pressure, then go to Step 7.
(See OIL PRESSURE INSPECTION [Z6].)
No
Go to the next step.
4
VERIFY TIMING CHAIN
INSTALLATION
• Is camshaft timing mark at correct
point?
(See Timing Chain Installation Note.)
Yes
Go to the next step.
No
Reinstall the timing chain, then go to Step 7.
(See TIMING CHAIN REMOVAL/INSTALLATION
[Z6].)
5
INSPECT OCV FOR MALFUNCTION
• Stop the engine.
• Remove the OCV.
(See OIL CONTROL VALVE (OCV)
REMOVAL/INSTALLATION [Z6].)
• Inspect position of the spool valve in
the OCV.
(See OIL CONTROL VALVE (OCV)
INSPECTION [Z6].)
• Is the spool valve located at valve
retard position?
Yes
VARIABLE VALVE TIMING MECHANISM IS
NORMAL
Note
• This DTC is detected by intermittent
concern.
• Intermittent concern might be removed
by cleaning mode of variable valve timing
control function.
Go to the next step.
No
Replace the OCV, then go to Step 7.
(See OIL CONTROL VALVE (OCV)
REMOVAL/INSTALLATION [Z6].)
6
INSPECT ENGINE OIL RUNNER
• Inspect following engine oil runners for
clogging or leakage.
- Between the oil pressure
switch and the OCV
- Between the OCV and the
variable valve timing actuator
- In the variable valve timing
actuator
• Is there any clogging or leakage?
Yes
Repair or replace suspected runner, then go to the
next step.
No
VARIABLE VALVE TIMING MECHANISM IS
NORMAL
Note
• This DTC is detected by intermittent
concern.
• Intermittent concern might be removed
by cleaning mode of variable valve timing
control function.
Go to the next step.
7
VERIFY TROUBLESHOOTING OF
DTC P0012 COMPLETED
• Make sure to reconnect all
disconnected connectors.
Yes
Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [Z6].)
No
Go to the next step.