DIAGNOSTIC PROCEDURE
DTC P050E (MZI-3.7) DIAGNOSTIC PROCEDURE
POSSIBLE
CAUSE
z
Exhaust restriction
z
Mechanical concern with the engine
z
Throttle body malfunction
z
Vacuum leakage
z
PCM malfunction
STEP
INSPECTION
ACTION
1
VERIFY FREEZE FRAME DATA HAS
BEEN RECORDED
z
Has FREEZE FRAME DATA been
recorded?
Yes Go to the next step.
No Record FREEZE FRAME DATA on the repair
order, then go to the next step.
2
VERIFY RELATED REPAIR
INFORMATION AVAILABILITY
z
Verify related Service Bulletins and/or
on-line repair information availability.
z
Is any related Service Bulletins
available?
Yes
Perform repair or diagnosis according to the
available Service Bulletins.
z
If the vehicle is not repaired, go to the
next step.
No
Go to the next step.
3
VERIFY RELATED PENDING CODE
OR STORED DTCs
z
Turn the ignition switch off then to the
ON position (Engine off).
z
Verify related pending code or stored
DTCs.
z
Is other DTCs present?
Yes Go to the appropriate DTC troubleshooting. (See
DTC TABLE [MZI-3.7]
.)
No
Go to the next step.
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 INTAKE AIR SYSTEM FOR
EXCESSIVE AIR SUCTION
z
Visually inspect the hose in intake air
system for looseness or damages.
z
Is there any malfunction?
Yes
Repair or replace the malfunctioning part, then
go to Step 9.
No
Go to the next step.
INSPECT THROTTLE BODY
PASSAGE
Yes Clean or replace the throttle body passage, then
go to Step 9.
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 246
© 2005 Mitchell Repair Information Company, LLC.
