6
INSPECT CMP SENSOR
z
Inspect the CMP sensor. (See
CRANKSHAFT POSITION
(CKP) SENSOR INSPECTION
[MZI-3.7]
.)
z
Is there any malfunction?
Yes
malfunctioning parts.
z
If it is normal, replace CMP sensor. (See
CRANKSHAFT POSITION (CKP)
SENSOR REMOVAL/INSTALLATION
[MZI-3.7]
.)
Then go to Step 18.
No
Go to the next step.
7
VERIFY CKP SENSOR
INSTALLATION CONDITION
z
Inspect for CKP sensor looseness.
z
Is the CKP sensor loose?
Yes
Retighten the CKP sensor, then go to Step 18.
(See
CRANKSHAFT POSITION (CKP)
SENSOR REMOVAL/INSTALLATION
[MZI-3.7]
.)
No
Go to the next step.
8
INSPECT IGNITION SYSTEM
OPERATION
z
Perform the spark test. (See
ENGINE CONTROL SYSTEM
OPERATION INSPECTION
[MZI-3.7]
.)
z
Are the results of the spark test
normal?
Yes Go to the next step.
No
Repair or replace the malfunctioning part
according to the spark test results, then go to Step
18.
9
INSPECT MAF PID
z
Start the engine.
z
Access the MAF PID using the M-
MDS.
z
Verify that the MAF PID changes
quickly according to the engine speed
when the engine is raced.
z
Is the MAF PID response normal?
Yes Go to the next step.
No
Replace the MAF/IAT sensor, then go to Step 18.
(See
INTAKE-AIR SYSTEM
REMOVAL/INSTALLATION [MZI-3.7]
.)
10
INSPECT FOR EXCESSIVE AIR
SUCTION IN INTAKE AIR SYSTEM
z
Inspect for air leakage at the
following:
{
Between the MAF/IAT sensor
and the throttle body
{
Between the throttle body and
the dynamic chamber
z
Is there any malfunction?
Yes
Repair or replace the suspected part, then go to
Step 18.
No
Go to the next step.
If the fuel line pressure is too low, go to the next
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 153
© 2005 Mitchell Repair Information Company, LLC.
