Mazda 3 Workshop Manual page 122

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
• The MIL illuminates if the PCM detects the above malfunction condition in two
consecutive drive cycles or in one drive cycle while the DTC for the same malfunction
has been stored in the PCM.
• The MIL flashes if the PCM detects the misfire which can damage the catalytic
converter during first drive cycle.
• PENDING CODE is available if the PCM detects the above malfunction condition
during the first drive cycle.
• FREEZE FRAME DATA is available.
• The DTC is stored in the PCM memory.
• Spark plug malfunction
• Erratic signal to ignition coil
• Fuel injector malfunction
• Air suction in intake air system (between dynamic chamber and cylinder head)
POSSIBLE
CAUSE
• Inadequate engine compression due to engine internal malfunction
• Related connector or terminal malfunction
• Related wiring harness malfunction
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 repair information
2
availability.
• Is any related repair information
available?
VERIFY RELATED PENDING CODE OR
STORED DTC
• Turn the ignition switch off, then to the ON
position (Engine off).
3
• Verify the related PENDING CODE or
stored DTCs.
• Are other DTCs present?
VERIFY CURRENT INPUT SIGNAL
4 STATUS (IGNITION SWITCH TO ON
/IDLE)
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ACTION
Record the FREEZE FRAME DATA on the
repair order, then go to the next step.
Perform repair or diagnosis according to the
available repair information.
• If the vehicle is not repaired, go to the next
step.
Go to the appropriate DTC inspection.
(See DTC TABLE [Z6].)
Inspect suspected circuit and/or part according
to inspection results. Then go to Step 13.
(See PCM INSPECTION [Z6].)
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