Mazda 3 Workshop Manual page 488

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
Diagnostic procedure
STEP INSPECTION
Verify the following:
• Vacuum connection
• Restriction in intake-air system (such
as air cleaner element, fresh duct)
• No air leakage from the intake-air
system
• No restriction of the intake-air system
1
• Proper sealing of the intake manifold
and components attached to intake
manifold; such as IAC valve, EGR
valve
• Fuel quality (such as proper octane,
contamination, winter/summer blend)
Are all items normal?
Connect the WDS or equivalent to the
DLC-2.
Retrieve any continuous memory,
KOEO and KOER DTCs.
2
If engine stall condition exists, retrieve
continuous memory and KOEO DTCs
using WDS or equivalent.
Are there any DTCs displayed?
3 Is the engine overheating?
Connect the WDS or equivalent to the
DLC-2.
Access RPM, MAF, TP, IAT and VSS
PIDs.
4
Drive vehicle while monitoring PIDs.
Are PIDs within specifications?
(See PCM INSPECTION
Downloaded from
• 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
No
Yes
No
[Z6].)
https://carmanualshub.com/
ACTION
Go to the next step.
Service if necessary.
Repeat Step 1.
DTC is displayed:
Go to the appropriate DTC inspection.
(See DTC TABLE [Z6].)
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
Go to the next step.
Go to the next step.
RPM PID:
Inspect the CKP sensor and related wiring
harness for vibration and/or intermittent
open/short circuit.
MAF PID:
- automotive repair manuals website
[Z6].)