Mazda 3 Workshop Manual page 482

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
Diagnostic procedure
STEP INSPECTION
Verify the following:
• Vacuum connection
• Air cleaner element
• No air leakage from the intake-air
system
• No restriction of the intake-air system
• Proper sealing of the intake manifold
and components attached to the intake
1
manifold: such as the IAC valve, EGR
valve
• Ignition wiring
• Fuel quality (such as proper octane,
contamination, winter/summer blend)
• Electrical connections
• Smooth operation of throttle valve
Are all items normal?
Connect the WDS or equivalent to the
DLC-2.
Retrieve any continuous memory,
KOEO and KOER DTCs.
2
If the engine stall, condition exists
retrieve continuous memory and KOEO
DTCs using WDS or equivalent.
Are there any DTCs displayed?
3 Is the engine overheating?
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this, always complete the "BEFORE SERVICE PRECAUTION" and "AFTER
SERVICE PRECAUTION" described in this manual.
(See BEFORE SERVICE
(See AFTER SERVICE PRECAUTION.)
Caution
• If there is foreign material on the connecting area of the quick release
connector, it might damage the connector or fuel pipe. To prevent this,
disconnect the connector and clean the connecting area before connecting.
RESULTS
Yes
No
Yes
No
Yes
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PRECAUTION.)
Go to the next step.
Service if necessary.
Repeat Step 1.
DTC is displayed:
Go to the appropriate DTC inspection.
(See DTC TABLE
No DTC is displayed:
Go to the next step.
Go to symptom troubleshooting "No.17
Cooling system concerns - Overheating".
(See NO.17 COOLING SYSTEM
CONCERNS-OVERHEATING
- automotive repair manuals website
ACTION
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