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Air Switching Valve Open Pressure 2.4 kPa or more Pulsation Detection Exhaust gas pulsation detected Pressure Condition in Secondary Air Injection System Case 6: Air Pump OFF Air Switching Valve Open Pressure Less than 2.4 kPa Pulsation Detection Exhaust gas pulsation detected Pressure Condition in Secondary Air Injection System Case 7: Air Pump ON Air Switching Valve Closed Pressure 2.4 kPa or more Pulsation Detection Exhaust gas pulsation not detected Pressure Condition in Secondary Air Injection System Case 8: Air Pump OFF Air Switching Valve Close Pressure Less than 2.4 kPa Pulsation Detection Exhaust gas pulsation not detected If the detected pressure is high, the air pump is assumed to be ON and if it alternates sharply, the ASV is HINT: The exhaust pulsation value is calculated in the ECM. If the calculated value exceeds a certain level, the ECM determines that the exhaust pulsation is in the AIR system. HINT: WHILE AIR OPERATING: AIR PUMP ON, ASV OPEN DETECTED CONDITIONS WHILE AIR NOT OPERATING: AIR PUMP OFF, ASV CLOSED ECM DETERMINATION DTCS OUTPUT Case 1 Case 8 Normal - Case 1 Case 6 ASV stuck open P2440 or P2442 Case 1 Case 7 Air pump stuck ON P2444 or P2446 3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2444-P2447;... |