Mazda CX-9 Grand Touring 2009 Manual page 1105

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
INSPECT AIR CLEANER ELEMENT
Remove air cleaner element with the
4
engine running.
Is the engine speed increased?
INSPECT FOR AIR SUCTION AT
INTAKE AIR SYSTEM
Inspect for air leakage at the
following:
Around connection of
5
dynamic chamber and intake
manifold
Around connection of intake
manifold and cylinder head
Is air leakage found?
INSPECT THROTTLE BODY
PASSAGE
6
Is the throttle body clogged?
INSPECT ENGINE COMPRESSION
Inspect the engine compression. (See
7
COMPRESSION INSPECTION
[MZI-3.7] .)
Is the engine compression normal?
INSPECT FOR RESTRICTION IN
EXHAUST SYSTEM AND TWC
8
Is there any restriction?
VERIFY TROUBLESHOOTING OF
DTC P0505 HAS BEEN COMPLETED
Verify that all disconnected
connectors are reconnected.
Turn the ignition switch to the ON
9
position (Engine off).
Clear the DTC from the PCM
memory using the M-MDS.
Perform the KOEO and KOER self-
test.
Retrieve the DTCs using the M-
MDS.
2008 Mazda CX-9 Grand Touring
Yes Replace the air cleaner element, then go to Step 9.
No
Repair or replace the suspected part, then go to
Yes
Step 9.
No
Clean or replace the throttle body passage, then go
Yes
to Step 9.
No
Yes Go to the next step.
No Overhaul the engine, then go to the next step.
Replace malfunctioning part, then go to the next
Yes
step.
No
Replace the PCM, then go to the next step. (See
Yes PCM REMOVAL/INSTALLATION [MZI-
3.7] .)
No
Go to the next step.
Go to the next step.
Go to the next step.
Go to the next step.
Go to the next step.