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
DIAGNOSTIC PROCEDURE
DTC P0301, P0302, P0303, P0304, P0305, P0306, P0316 (MZI-3.5) DIAGNOSTIC PROCEDURE
z
Are any DTC present?
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
z
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.
POSSIBLE CAUSE
z
Spark plug malfunction
z
Ignition system malfunction
z
Ignition coil malfunction
z
Fuel injector malfunction
z
Air suction in intake air system (between dynamic chamber and cylinder
head)
z
Inadequate engine compression due to engine internal malfunction
z
Related connector or terminal malfunction
z
Related wiring harness 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
Yes Perform repair or diagnosis according to
2007 Mazda CX-9 Grand Touring
2007 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.5) - CX-9
Microsoft
Sunday, November 15, 2009 9:26:31 AM
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© 2005 Mitchell Repair Information Company, LLC.