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SYMPTOM TROUBLESHOOTING [ENGINE CONTROL SYSTEM (ZM)] 01–03A–41 01–03A End Of Sie NO.19 EXHAUST SMOKE [ZM] A3U010318881W61 3 • Remove thermostat and inspect operation. • Is thermostat okay? Yes Inspect cooling fan and condenser fan operation. • If both or either fan operate abnormally, inspect for terminal 47 — Short to GND between condenser fan relay and PCM terminal 45 — Circuit between cooling fan relay and fan motor shorts to battery supply line — Circuit between condenser fan relay and fan motor shorts to battery supply line No Access ECT PID on WDS or equivalent. • If temperature gauge on instrument cluster indicates • If temperature gauge on instrument cluster indicates 4 • Verify test results. • If vehicle is repaired, troubleshooting is completed. • If vehicle is not repaired or additional diagnostic information is not available, replace PCM. STEP INSPECTION ACTION 19 Exhaust smoke DESCRIPTION • Blue, black, or white smoke from exhaust system POSSIBLE CAUSE Blue smoke (Burning oil): • PCV valve malfunction • Engine internal oil leakage White smoke (Water in combustion): • Cooling system malfunction (coolant loss) • Engine internal coolant leakage Black smoke (Rich fuel mixture): • Air cleaner restriction • Intake-air system is collapsed or restricted. • Fuel return line is restricted. • Excessive fuel pressure • Improper engine compression • Injector fuel leakage • Ignition system malfunction Warning •••• Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep •••• Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or 1712-1U-01G(01-03A).fm 41 ページ 2001年6月29日 金曜日 午後4時45分 |