z
Is there the misfire DTC for the
cylinder which has a suspected fuel
injector?
10
INSPECT FOR AIR SUCTION AT
INTAKE AIR SYSTEM
z
Inspect for air leakage at the
following:
{
Around the connection of the
dynamic chamber and the
intake manifold
{
Around the connection of the
intake manifold and the
cylinder head
z
Is air leakage found?
Yes Repair or replace the suspected part, then
go to Step 13.
No
Go to the next step.
11
INSPECT SEALING OF ENGINE
COOLANT PASSAGE
z
Remove the radiator cap.
z
Implement the procedure to bleed air
from the engine coolant, then run the
engine at idle.
z
Are there any small bubbles which
make the engine coolant white at
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 Step 13.
2007 Mazda CX-9 Grand Touring
2007 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.5) - CX-9
Microsoft
Sunday, November 15, 2009 9:26:31 AM
Page 169
© 2005 Mitchell Repair Information Company, LLC.
