4
INSPECT AIR CLEANER ELEMENT
z
Remove air cleaner element with the
engine running.
z
Is the engine speed increased?
Yes Replace the air cleaner element, then go to Step 9.
No
Go to the next step.
5
INSPECT FOR AIR SUCTION AT
INTAKE AIR SYSTEM
z
Inspect for air leakage at the
following:
{
Around connection of
dynamic chamber and intake
manifold
{
Around connection of intake
manifold and cylinder head
z
Is air leakage found?
Yes
Repair or replace the suspected part, then go to
Step 9.
No
Go to the next step.
6
INSPECT THROTTLE BODY
PASSAGE
z
Is the throttle body clogged?
Yes Clean or replace the throttle body passage, then go
to Step 9.
No
Go to the next step.
7
INSPECT ENGINE COMPRESSION
z
Inspect the engine compression. (See
COMPRESSION INSPECTION
[MZI-3.7]
.)
z
Is the engine compression normal?
Yes Go to the next step.
No
Overhaul the engine, then go to the next step.
8
INSPECT FOR RESTRICTION IN
EXHAUST SYSTEM AND TWC
z
Is there any restriction?
Yes
Replace malfunctioning part, then go to the next
step.
No
Go to the next step.
9
VERIFY TROUBLESHOOTING OF
DTC P0505 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
Perform the KOEO and KOER self-
test.
z
Retrieve the DTCs using the M-
MDS.
Yes
Replace the PCM, then go to the next step. (See
PCM REMOVAL/INSTALLATION [MZI-
3.7]
.)
No
Go to the next step.
2008 Mazda CX-9 Grand Touring
2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:08:38 AM
Page 241
© 2005 Mitchell Repair Information Company, LLC.
