DTC P0452 (MZI-3.5) DIAGNOSTIC PROCEDURE
STEP
INSPECTION
ACTION
1
VERIFY FREEZE FRAME DATA
HAS BEEN RECORDED
z
Has the 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 repair information
available?
Yes
Perform the repair or diagnosis according
to the available repair information.
z
If the vehicle is not repaired, go to
the next step.
No
Go to the next step.
3
INSPECT FUEL TANK PRESSURE
SENSOR CONNECTOR FOR POOR
CONNECTION
z
Turn the ignition switch off.
z
Disconnect the fuel tank pressure
sensor connector.
z
Inspect for poor connection (such
as damaged/pulled-out pins,
corrosion).
z
Are there any malfunction?
Yes
Repair or replace suspected part, then go
to Step 7.
No
Go to the next step.
4
VERIFY FUEL TANK PRESSURE
SIGNAL CIRCUIT FOR SHORT TO
GROUND
z
Turn the ignition switch off.
z
Inspect for continuity between fuel
tank pressure sensor terminal A
(wiring harness-side) and body
ground.
z
Is there continuity?
Yes
Repair or replace suspected part, then go
to Step 7.
No
Go to the next step.
5
INSPECT FUEL TANK PRESSURE
SENSOR SIGNAL CIRCUIT AND
GROUND CIRCUIT FOR SHORT
EACH OTHER
z
Turn the ignition switch off.
z
Disconnect the fuel tank pressure
sensor and PCM connector.
Yes
Go to the next step.
No
Repair or replace suspected part, then go
to Step 7.
2007 Mazda CX-9 Grand Touring
2007 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.5) - CX-9
Microsoft
Sunday, November 15, 2009 9:26:33 AM
Page 230
© 2005 Mitchell Repair Information Company, LLC.