{
Cracks
{
Excess wear
{
Gap
{
Wet
z
Is any problem found on the spark
plug?
(see
SPARK PLUG
REMOVAL/INSTALLATION
[MZI-3.5]
.)
No
Go to the next step.
7
INSPECT IGNITION SYSTEM
OPERATION FOR SUSPECTED
CYLINDER
z
Perform the spark test for the
suspected cylinder.
(see
ENGINE CONTROL
SYSTEM OPERATION
INSPECTION [MZI-3.5]
.)
z
Are the results of the spark test
normal?
Yes Go to the next step.
No
Replace or replace the malfunctioning part
according to the spark test results, then go
to Step 13.
8
INSPECT FUEL INJECTOR WIRING
HARNESS
z
Remove the intake air system parts.
z
Disconnect the fuel injector
connector on the suspected cylinder.
z
Connect the noid light to the fuel
injector connector terminals.
z
Verify the light dimness during
cranking.
z
Does the noid light illuminate?
Yes Go to the next step.
No
Inspect the fuel injector wiring harnesses.
Repair or replace if necessary, then go to
Step 13.
9
INSPECT FUEL INJECTOR
OPERATION
z
Remove fuel injector from the
suspected cylinder.
(see
FUEL INJECTOR
REMOVAL/INSTALLATION
[MZI-3.5]
.)
z
Swap the fuel injector with one from
another cylinder.
z
Start the engine and run it at idle.
Yes Replace fuel injector, then go to Step 13.
(see
FUEL INJECTOR
REMOVAL/INSTALLATION [MZI-
3.5]
.)
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 9:26:31 AM
Page 168
© 2005 Mitchell Repair Information Company, LLC.