ENGINE CONTROL SYSTEM
OPERATION INSPECTION
[MZI-3.7]
.)
z
Does the variable timing control
system work properly?
No
Repair or replace the malfunctioning part
according to the variable valve timing control
system inspection results, then go to Step 18.
15
INSPECT OPERATION OF PURGE
SOLENOID VALVE
z
Inspect the purge control system
operation. (See
ENGINE
CONTROL SYSTEM
OPERATION INSPECTION
[MZI-3.7]
.)
z
Does the purge control system work
properly?
Yes Go to the next step.
No
Repair or replace the malfunctioning part
according to the purge control system inspection
results, then go to Step 18.
16
INSPECT PCV VALVE OPERATION
z
Turn the ignition switch off.
z
Remove the PCV valve and check
the valve operation. (See
POSITIVE
CRANKCASE VENTILATION
(PCV) VALVE INSPECTION
[MZI-3.7]
.)
z
Is the PCV valve operation normal?
Yes Replace the PCV valve, then go to Step 18.
No
Go to the next step.
17
INSPECT SEALING OF ENGINE
COOLANT PASSAGE
WARNING:
z
Never remove the cooling system
cap or loosen the radiator drain
plug while the engine is running, or
when the engine and radiator are
hot. Scalding engine coolant and
steam may shoot out and cause
serious injury. It may also damage
the engine and cooling system.
z
Turn off the engine and wait until it
is cool. Even then, be very careful
when removing the cap. Wrap a
thick cloth around it and slowly
turn it counterclockwise to the first
stop. Step back while the pressure
escapes
z
When you are sure all the pressure
is gone, press down on the cap
using the cloth, turn it, and remove
it.
Yes
Air penetrates due to poor sealing of the head
gasket or other areas between the combustion
chamber and the engine coolant passage. Repair
or replace malfunctioning parts, then go to the
next step.
2008 Mazda CX-9 Grand Touring
2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:08:36 AM
Page 155
© 2005 Mitchell Repair Information Company, LLC.
