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Case 4: TYPICAL MALFUNCTION THRESHOLDS MONITOR RESULT Refer to CHECKING MONITOR STATUS . WIRING DIAGRAM Refer to DTC P2431 . INSPECTION PROCEDURE HINT: Determination by ECM monitoring: The ECM locates malfunctions in the Secondary Air Injection (AIR) system by detecting the pressure in the The following 4 patterns are AIR system pressure conditions in the AIR system passage. Pressure Condition in Secondary Air Injection System Case 1: AIR SWITCHING VALVE CONDITION CHART Pressure Condition in Secondary Air Injection System Case 2: AIR SWITCHING VALVE CONDITION CHART Pressure Condition in Secondary Air Injection System Case 3: AIR SWITCHING VALVE CONDITION CHART AIR pressure change 1 kPa or more Air Pump ON Air Switching Valve Open Pressure 1 kPa or more Pulsation Detection Exhaust gas pulsation detected Air Pump OFF Air Switching Valve Open Pressure Less than 1 kPa Pulsation Detection Exhaust gas pulsation detected
2008 Toyota Tundra 2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra
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