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SYMPTOM TROUBLESHOOTING [ENGINE CONTROL SYSTEM (FS)] 01–03B–25 01–03B End Of Sie 13 • Connect WDS or equivalent to DLC-2. • Start engine and run it at idle. • Access LONG FT1 PID. • Measure LONG FT1 PID at idle. • Is PID value between -15% and +15%? Yes Go to next step. No LONG FT1 PID is out of specification. • Inspect evaporative emission control system. • If system is okay, go to Step 15. Greater than specification (too lean): • Inspect for air leakage at intake-air system • If system okay, go to next step. 14 • Disconnect vacuum hose between purge • Plug opening end of vacuum hose. • Start engine. • Does engine condition improve? Yes Inspect if purge solenoid valve is stuck open No Go to next step. 15 • Remove and shake PCV valve. • Does PCV valve rattle? Yes Go to next step. No Replace PCV valve. 16 • Is there any restriction in exhaust system? Yes Inspect exhaust system. No Go to next step. 17 • Visually inspect CMP sensor and projections • Are CMP sensor and projections of camshaft Yes Go to next step. No Replace malfunctioning parts. 18 • Inspect engine condition while tapping EGR • Does engine condition improve? Yes Replace EGR valve. No Go to next step. 19 • Is engine compression correct? Yes Inspect valve timing. No Inspect for causes. 20 • Verify test results. • If vehicle is repaired, troubleshooting completed. • If vehicle is not repaired or additional diagnostic information is not available, replace PCM. STEP INSPECTION RESULTS ACTION 1712-1U-01G(01-03B).fm 25 ページ 2001年6月29日 金曜日 午前9時33分 |