DIAGNOSTIC PROCEDURE
DTC P0148 (MZI-3.5) DIAGNOSTIC PROCEDURE
z
Damaged or worn fuel pump
z
Damaged or contaminated MAF sensor
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
INSPECT SYSTEM INTEGRITY
z
Visually inspect the complete fuel
delivery system for damage and
leakage.
z
Check the following:
{
Fuel lines and connections
{
Relays
{
Fuel tank
{
Fuel pump
{
Fuel pressure regulator
{
Fuel pulse damper
{
Fuel rail at fuel injectors
{
Damaged connector pins
{
Electrical connectors not
fully engaged
z
Verify that the vehicle has
followed the maintenance
schedule. A new fuel filter should
have been installed within the last
48,280 km {29,934 mph}.
z
Verify that the fuse integrity.
Yes
Repair if necessary. Then go to Step 11.
No
Go to the next step.
2007 Mazda CX-9 Grand Touring
2007 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.5) - CX-9
Microsoft
Sunday, November 15, 2009 9:26:30 AM
Page 105
© 2005 Mitchell Repair Information Company, LLC.