Mazda CX-9 Grand Touring 2007 Manual page 513

2007 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.5) - CX-9
Are any DTC present?
DTC P0301, P0302, P0303, P0304, P0305, P0306, P0316 [MZI-3.5]
DTC P0301, P0302, P0303, P0304, P0305, P0306, P0316 (MZI-3.5) DETECTION CONDITION AND
POSSIBLE CAUSES
DTC P0301 P0301: Cylinder No.1 misfire detected
DTC P0302 P0302: Cylinder No.2 misfire detected
DTC P0303 P0303: Cylinder No.3 misfire detected
DTC P0304 P0304: Cylinder No.4 misfire detected
DTC P0305 P0305: Cylinder No.5 misfire detected
DTC P0306 P0306: Cylinder No.6 misfire detected
DTC P0316 P0316:Misfire detected on startup (first 1000 revolutions)
DETECTION
CONDITION
POSSIBLE CAUSE
DIAGNOSTIC PROCEDURE
DTC P0301, P0302, P0303, P0304, P0305, P0306, P0316 (MZI-3.5) DIAGNOSTIC PROCEDURE
STEP
1 VERIFY FREEZE FRAME DATA HAS
BEEN RECORDED
Has FREEZE FRAME DATA been
recorded?
2 VERIFY RELATED REPAIR
2007 Mazda CX-9 Grand Touring
The PCM monitors the crankshaft position sensor input signal interval time.
The PCM calculates the change of the interval time for each cylinder. If the
change of interval time exceeds the pre-programmed criteria, the PCM
detects a misfire in the corresponding cylinder, when the engine is running,
the PCM counts the number of misfires that occurred at 200 crankshaft
revolutions and 1,000 crankshaft revolutions and calculates the misfire ratio
for each crankshaft revolution. If the ratio exceeds the pre-programmed
criteria, the PCM determines that a misfire, which can damage the catalytic
converter or affect emission performance, has occurred.
Spark plug malfunction
Ignition system malfunction
Ignition coil malfunction
Fuel injector malfunction
Air suction in intake air system (between dynamic chamber and cylinder
head)
Inadequate engine compression due to engine internal malfunction
Related connector or terminal malfunction
Related wiring harness malfunction
INSPECTION ACTION
Yes Go to the next step.
No Record FREEZE FRAME DATA on the
repair order, then go to the next step.
Yes Perform repair or diagnosis according to