Mazda 3 Workshop Manual page 58

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
Diagnostic procedure
STEP
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?
INSPECT REAR HO2S CONNECTOR FOR
POOR CONNECTION
• Turn the ignition switch off.
• Disconnect the rear HO2S connector.
3
• Inspect for poor connection (such as
damaged/pulled-out pins, corrosion).
• Is there any malfunction?
INSPECT REAR HO2S HEATER
4
• Inspect the rear HO2S heater.
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INSPECTION
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ACTION
Yes Go to the next step.
Record the FREEZE FRAME DATA on the
No
repair order, then go to the next step.
Perform repair or diagnosis according to
the available repair information.
Yes
• If the vehicle is not repaired, go to the
next step.
No Go to the next step.
Repair or replace the terminal, then go to
Yes
Step 9.
No Go to the next step.
Replace the rear HO2S, then go to Step 9.
Yes
(See REAR HEATED OXYGEN SENSOR
(HO2S) REMOVAL/INSTALLATION
- automotive repair manuals website
[Z6].)