z
Is the engine coolant fill level
correct?
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're sure all the
pressure is gone, press down
on the cap using the cloth, turn
it, and remove it.
Go to Step 5.
4
INSPECT SENSOR OPERATION
z
Run the engine until the engine
temperature stabilizes.
z
Verify that the radiator hoses are
hot and the cooling system is
pressurized.
z
Access the PCM and monitor the
CHT PID.
z
Is the temperature more than 77 °
C {170.6 °F}?
Yes
The test is complete. Go to the next step.
No
Inspect the thermostat operation. Repair if
necessary.
(see
THERMOSTAT INSPECTION
[MZI-3.5]
.)
5
VERIFY TROUBLESHOOTING OF
DTC P0128 HAS BEEN
COMPLETED
z
Verify that all disconnected
connectors are reconnected.
z
Turn the ignition switch to the ON
position (Engine off).
z
Clear the DTC from the PCM
memory using the M-MDS.
z
Start the engine and run it at idle.
z
Retrieve DTCs using the M-MDS.
z
Is the PENDING CODE for this
DTC present?
Yes
Replace PCM, then go to the next step.
(see
PCM
REMOVAL/INSTALLATION [MZI-
3.5]
.)
No
Go to the next step.
6
VERIFY AFTER REPAIR
Yes
Go to the applicable DTC inspection.
2007 Mazda CX-9 Grand Touring
2007 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.5) - CX-9
Microsoft
Sunday, November 15, 2009 9:26:30 AM
Page 84
© 2005 Mitchell Repair Information Company, LLC.
