Mazda 3 Workshop Manual page 495

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
• Improper valve timing due to jumping out of timing belt
• Contaminated MAF sensor
• Improper engine compression
• Exhaust system clogging
The following troubleshooting flow chart contains the fuel system diagnosis and repair
procedures. Read the following warnings before performing the fuel system services:
Diagnostic procedure
STEP INSPECTION
Inspect for following:
• Air cleaner element for contamination
• ATF level
• Fuel quality
1
• Coolant level
• Brake dragging
• Clutch slippage
Are all items normal?
Connect the WDS or equivalent to the
DLC-2.
Retrieve any continuous memory, KOEO
2
and KOER DTCs using WDS or
equivalent.
Are there any DTCs displayed?
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Warning
• Fuel vapor is hazardous. It can easily ignite, causing serious injury and
damage. Always keep sparks and flames away from fuel.
• Fuel line spills and leakage are dangerous. Fuel can ignite and cause
serious injuries or death and damage. Fuel can also irritate skin and eyes. To
prevent 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
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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.
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