Mazda 3 - Page 263

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
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263
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
INSPECT FRONT HO2S TERMINALS
• Turn the ignition switch off.
• Disconnect the front HO2S 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.
4
INSPECT FRONT HO2S HEATER
• Inspect the front HO2S heater.
Yes
Go to the next step.
No
Replace the front HO2S, then go to Step 7.