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ENGINE SPEED SUSPECTED AREA PRIMARY PARTS TO INSPECT PROCEDURE Air-fuel ratio abnormal Air suction Intake system connections Purge VSV system Brake booster 5 to 9 Sensor malfunction (value from sensor too lean) Mass air flow meter Engine coolant temperature sensor Air fuel ratio sensor system Water inlet with thermostat sub-assembly 11 to 23 Sensor malfunction (value from sensor too rich) 39 to 51 Fuel supply problem Fuel pump control circuit Purge VSV system Fuel line ECM 24 to 37 Intake air volume insufficient Problem with air passage Intake system connections Mass air flow meter Brake booster PCV valve and hose Purge VSV system 53 to 55 Excessive valve overlap Camshaft timing oil control valve 56 to 59 Abnormal combustion EGR valve assembly 60, 61 Ignition timing incorrect Does not operate as expected Knock sensor Engine coolant temperature sensor Mass air flow meter 62 to 66 Rapidly decreases and engine stalls* Ignition and injection stops (electrical system malfunction) Power temporarily cut Power supply circuit (fuel injector assembly, ignition coil assembly) 67, 68 External part malfunctioning Increase in load Air conditioning system Electrical load signal system Power steering system A/T system Park/neutral position switch assembly 69 to 81 1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1603,P1605;... |