Mazda CX-9 Grand Touring 2009 Manual page 1016

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
DTC P0300 (MZI-3.7) DIAGNOSTIC PROCEDURE
STEP INSPECTION
VERIFY FREEZE FRAME DATA HAS
BEEN RECORDED
1
Has FREEZE FRAME DATA been
recorded?
VERIFY RELATED REPAIR
INFORMATION AVAILABILITY
Verify related Service Bulletins
2
and/or on-line repair information
availability.
Is any related Service Bulletins
available?
VERIFY RELATED PENDING CODE
OR STORED DTCs
Turn the ignition switch off then to
3
the ON position (Engine off).
Verify related pending code or stored
DTCs.
Are other DTCs present?
VERIFY CURRENT INPUT SIGNAL
STATUS (KEY TO ON/IDLE)
Access APP1, APP2, APP3, ECT,
IAT, MAF, RPM, TP_REL and VSS
PIDs using the M-MDS. (See PCM
4
INSPECTION [MZI-3.7] .)
Is there any signal that is far out of
specification when the ignition
switch is in the ON position and
engine runs at idle?
VERIFY CURRENT INPUT SIGNAL
STATUS UNDER TROUBLE
CONDITION
Inspect the same PIDs as in Step 4
5
when simulating the FREEZE
FRAME DATA condition.
Is there any signal which causes
drastic changes?
2008 Mazda CX-9 Grand Touring
Yes Go to the next step.
Record FREEZE FRAME DATA on the repair
No
Perform repair or diagnosis according to the
available Service Bulletins.
Yes
No
Go to the appropriate DTC troubleshooting. (See
Yes
DTC TABLE [MZI-3.7].)
No
Inspect the suspected circuit or part or both
according to inspection results.
Yes
(See PCM INSPECTION [MZI-3.7] .)
Then go to Step 18.
No
Inspect the suspected circuit or part or both
according to inspection results.
Yes
(See PCM INSPECTION [MZI-3.7] .)
Then go to Step 18.
No
Inspect the installation condition for damage to
the timing belt and gears, and repair
ACTION
order, then go to the next step.
If the vehicle is not repaired, 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.