Mazda 6 Workshop Manual page 244

STEP
13 Inspect for improper operation, kinks, clogging
or disconnection on guide blade actuator.
Is the actuator normal?
14 Remove the parts necessary to inspect the
turbocharger.
Do not remove the turbocharger.
Inspect if the turbocharger compressor wheel is
bent, damaged, or interfering with housing on
the vehicle.
Is there any problem?
15 Inspect if the turbocharger compressor wheel
locknut is loose or has fallen into the
turbocharger.
Is there any problem?
16 Inspect if the turbocharger compressor wheel by
hand.
Does the wheel turn easily and smoothly?
17 Inspect if the turbocharger turbine wheel is
damaged, cracked or interfering with the
housing on the vehicle.
Note
• Inspect all the fins on each turbine wheel.
Is there any problem?
18 Is any engine oil found inside the turbocharger
compressor housing?
19 Inspect the suction control valve.
Is the suction control valve normal?
20 Is the engine compression correct?
21 Inspect the IDM.
Is the IDM normal?
22 Inspect the fuel injector.
Is the fuel injector normal?
23 Verify the test results.
• If normal, return to the diagnostic index to service any additional symptoms.
• If the malfunction remains, replace the PCM.
End Of Sie
ENGINE CONTROL SYSTEM OPERATION INSPECTION
EGR Control System Inspection
1. Perform the "Intake Shutter Valve Operation Inspection".
2. Make sure that all the hoses are securely connected in the proper position.
3. Connect the WDS or equivalent to the DLC-2.
4. Turn the engine switch to the ON position.
5. Access the EGRVP PID.
6. Verify that the PID value is within specification.
F2–232
TROUBLESHOOTING
INSPECTION RESULTS
Yes Go to the next step.
No Repair or replace if necessary.
If the concern is resolved, complete the inspection.
If the concern still exists, the turbocharger is normal.
Go to the next step.
Yes Replace the turbocharger.
No Go to the next step.
Yes Replace the turbocharger.
No Go to the next step.
Yes Go to the next step.
No Replace the turbocharger.
Yes Replace the turbocharger.
No Go to the next step.
Yes Wipe oil off vehicle and install all the removed parts in
Step 15. Then, go to the next step.
No The turbocharger is normal.
Install all the parts removed is Step 15. Then, go to the
next step.
Yes Go to the next step.
No Repair the supply pump.
Yes Go to the next step.
No Inspect for the following:
• Damaged valve seat
• Worn valve stem and valve guide
• Worn or stuck piston ring
• Worn piston, piston ring or cylinder
• Improper valve timing
Service if necessary.
Yes Go to the next step.
No Repair or replace if necessary.
Yes Inspect following:
• Boost sensor
• Fuel pressure limiter (built-in common rail)
• Fuel pressure sensor
• Fuel return line restriction or clogging
Service if necessary.
No Repair or replace if necessary.
ACTION
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