Mazda 3 - Page 73

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
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73
Diagnostic procedure
STEP
INSPECTION
ACTION
1
VERIFY FREEZE FRAME DATA
HAS BEEN RECORDED
• Has FREEZE FRAME DATA been
recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA on the repair
order, then go to the next step.
2
VERIFY RELATED REPAIR
INFORMATION AVAILABILITY
• Verify related service repair
information availability.
• Is any related repair information
available?
Yes
Perform repair or diagnosis according to the
available repair information.
• If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
VERIFY RELATED PENDING CODE
OR STORED DTC
• Turn the ignition switch off, then to
the ON position (Engine off).
• Verify the related PENDING CODE
or stored DTCs.
• Are other DTCs present?
Yes
Go to the appropriate DTC inspection.
(See DTC TABLE [Z6].)
No
Go to the next step.
4
INSPECT MAF/IAT SENSOR
CONNECTOR FOR POOR
CONNECTION
• Turn the ignition switch off.
• Disconnect the MAF/IAT sensor
connector.
• Inspect for poor connection (such as
damaged/pulled-out pins, corrosion).
• Is there any malfunction?
Yes
Repair or replace the terminal, then go to Step 7.
No
Go to the next step.
5
INSPECT IAT SENSOR
• Inspect the IAT sensor.
(See INTAKE AIR TEMPERATURE
(IAT) SENSOR INSPECTION [Z6].)
• Is there any malfunction?
Yes
Replace the MAF/IAT sensor, then go to Step 7.
(See MASS AIR FLOW (MAF)/INTAKE AIR
TEMPERATURE (IAT) SENSOR
REMOVAL/INSTALLATION [Z6].)
No
Go to the next step.
6
INSPECT PCM CONNECTOR FOR
POOR CONNECTION
• Turn the ignition switch off.
• Disconnect the PCM connector.
• Inspect for poor connection (such as
damaged/pulled-out pins, corrosion).
Yes
Repair or replace the terminal, then go to the next
step.
No
Go to the next step.