F2–188
TROUBLESHOOTING
End Of Sie
13 Is engine compression correct?
(See B2–8 COMPRESSION INSPECTION)
Yes Go to next step.
No Inspect for 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 as necessary.
14 Inspect fuel injector.
(See F2–56 FUEL INJECTOR INSPECTION)
Is fuel injector okay?
Yes Go to next step.
No Repair or replace as necessary.
15 Inspect EGR system operation.
Is EGR system operation normal?
Yes Go to next step.
No Repair or replace malfunctioning part according to
EGR system operation results.
16 Inspect EGR water cooler for following:
• Coolant passage clogging/restriction
• Exhaust gas clogging/restriction
Is EGR water cooler okay?
Yes Go to next step.
No Service as necessary.
17 Inspect IDM.
(See F2–84 INJECTOR DRIVER MODULE
(IDM) INSPECTION)
Is IDM okay?
Yes Remove and inspect supply pump and common rail.
No Repair or replace as necessary.
18 Verify test results.
• If okay, return to diagnostic index to service any additional symptoms.
• If malfunction remains, replace PCM. (See F2–64 PCM REMOVAL/INSTALLATION)
STEP INSPECTION RESULTS ACTION
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