The suspected circuits or parts for each problem symptom are shown in the table below. Use this table to troubleshoot when, during a DTC check, a "Normal" code is displayed but the problem is still occurring. Numbers in the table show the inspection order in which the circuits or parts should be checked.
HINT: In some cases, the problem is not detected by the diagnostic system even though a problem symptom is present. It is possible that the problem is occurring outside the detection range of the diagnostic system, or that the problem is occurring in a completely different system.
Overhaul
1. DRAIN ENGINE OIL
2. REMOVE SPARK PLUG
3. REMOVE VENTILATION VALVE SUB-ASSY
4. REMOVE OIL FILLER CAP SUB-ASSY
5. REMOVE OIL FILLER CAP GASKET
6. REMOVE CYLINDER HEAD COVER SUB-ASSY
(a) Remove the 2 engine wire harness clamps.
(b) Remove the 3 nuts and disconnect the engine wire harness. ...