Mazda 6 Workshop Manual page 241

STEP INSPECTION
13 Inspect the turbocharger compressor wheel by
hand.
Does the wheel turn easily and smoothly?
14 Inspect if the turbocharger turbine wheel is
damaged, cracked or interfering with the
housing on vehicle.
Note
• Inspect all the fins on each turbine wheel.
Is there any problem?
15 Is any engine oil found inside the turbocharger
turbine housing?
16 Is any engine oil found inside the turbocharger
compressor housing?
17 Inspect the EGR system operation.
(See F2–232 EGR Control System
Is the EGR system operation normal?
18 Inspect the EGR water cooler for the following:
• Coolant passage clogging/restriction
• Exhaust gas clogging/restriction
Is the EGR water cooler normal?
19 Inspect the glow system operation.
Is the glow system operation normal?
20 Visually inspect the CKP sensor and the pulse
wheel teeth.
Are CKP sensor and the pulse wheel teeth
normal?
21 Measure the gap between the CKP sensor and
the pulse wheel teeth.
Specification
1.5—2.5 mm {0.059—0.098 in}
Is the gap within the specification?
22 Visually inspect the CMP sensor and the pulse
wheel teeth.
Are the CMP sensor and the pulse wheel teeth
normal?
23 Inspect the fuel pressure sensor.
Is the fuel pressure normal?
24 Inspect the suction control valve.
Is the suction control valve normal?
25 Is the engine compression correct?
TROUBLESHOOTING
RESULTS
Yes Go to the next step.
No Replace the turbocharger.
Yes Replace the turbocharger.
No Go to the next step.
Yes Excessive amount of oil is found:
Replace the turbocharger.
Small amount of oil is found:
Wipe oil off vehicle, then go to the next step.
No Go to the next step.
Yes Wipe oil off vehicle and install all the removed parts in
Step 10. Then, go to the next step.
No The turbocharger is normal.
Install all the parts removed in Step 10.
Then, go to the next step.
Yes Go to the next step.
Inspection.)
No Repair or replace the malfunctioning part according to
the EGR control system inspection results.
Yes Go to the next step.
No Service if necessary.
Yes Go to the next step.
No Repair or replace the malfunctioning part according to
the glow system operation results.
Yes Go to the next step.
No Replace the malfunctioning parts.
Yes Go to the next step.
No Adjust the CKP sensor position.
Yes Inspect the following PIDs:
(See
• ECT
• IAT
• MAF
• MAP
• RPM
• VSS
If the PID value is not as specified, repair or replace
the malfunctioning parts.
If the PID value is normal, go to the next step.
No Replace the malfunctioning parts.
Yes Go to the next step.
No Replace the common rail.
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.
ACTION
F2–31 PCM INSPECTION.)
F2
F2–229