z
An engine overheat condition is
sensed by the CHT sensor.
z
Check the cooling system for:
{
Correct coolant level
{
Internal or external coolant
leaks
{
Blockage of the radiator
{
Cooling fan operation
z
Is the cooling system normal?
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.
NOTE:
z
If the electric cooling fan does
not operate, go to the applicable
DTC inspection. (See DTC
TABLE [MZI-3.5].)
No
Repair if necessary. Then go to the next
step.
4
INSPECT OPERATION OF THE
CHT SENSOR
z
Run the engine until the engine
temperature stabilizes.
z
Verify the radiator hoses are hot
and the cooling system is
pressurized.
z
Verify self-test DTCs.
z
Is DTC P1285 present?
Yes
Go to the next step.
No
An engine overheat temperature was not
detected. Repair any other DTCs if
necessary.
5
INSPECT CHT SENSOR
z
Inspect the CHT sensor.
(see
CYLINDER HEAD
TEMPERATURE (CHT)
SENSOR INSPECTION [MZI-
3.5].
)
Yes
Replace the CHT sensor, then go to the
next step.
No
Go to the next step.
2007 Mazda CX-9 Grand Touring
2007 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.5) - CX-9
Microsoft
Sunday, November 15, 2009 9:26:36 AM
Page 349
© 2005 Mitchell Repair Information Company, LLC.
