|
|
SYMPTOM TROUBLESHOOTING [ENGINE CONTROL SYSTEM (ZM)] 01–03A–17 01–03A End Of Sie 12 • Connect vacuum hose to pressure regulator. • Install vacuum gauge to intake manifold. • Start engine. • Does fuel pressure gauge reading increase Yes Go to next step. No Connect vacuum pump to pressure regulator. • If changes, inspect vacuum line. • If does not change, replace pressure regulator. 13 • Disconnect vacuum hose from purge • Attempt to start engine. • Is starting condition improved? Yes Inspect if purge solenoid valve sticks open. No Go to next step. 14 • Inspect for contaminated MAF sensor. • Is there any contamination? Yes Replace MAF sensor. No Go to next step. 15 • Is there a restriction in exhaust system? Yes Inspect exhaust system. No Go to next step. 16 • Inspect engine condition while tapping EGR • Does engine condition improve? Yes Replace EGR valve. No Go to next step. 17 • Inspect starting system. • Is starting system normal? Yes Inspect for loose connectors or poor terminal contact. • If okay, remove EGR valve and visually inspect for No Repair or replace components as required. 18 • 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 ACTION 1712-1U-01G(01-03A).fm 17 ページ 2001年6月29日 金曜日 午後4時45分 |