|
|
Content .. 1247 1248 1249 1250 ..
Pressure Condition in Secondary Air Injection System Case 4: AIR SWITCHING VALVE CONDITION CHART 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 HINT: In case 3, as the pressure sensor detects a slight pump operation pulsation, the detected value is not In case 1, the average pressure is approximately 5 to 11 kPa. The value of 1 kPa indicated in the table AIR PUMP CONDITION CHART Air Pump OFF Air Switching Valve Close Pressure Less than 1 kPa Pulsation Detection Exhaust gas pulsation detected Detected Conditions 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 4 Normal - Case 1 Case 2 ASV stuck open P2440 or P2442 Case 1 Case 3 Air pump stuck ON P2444 or P2446 Case 2 Case 4 Air pump stuck OFF P2445 or P2447 Case 3 Case 4 ASV stuck closed P2441 or P2443 Case 1 Case 1 ASV stuck open and air P2440 and P2444 or P2442 and P2446 Case 2 Case 2 ASV stuck open and air P2440 and P2445 or P2442 and P2447 Case 3 Case 3 ASV stuck closed and P2441 and P2444 or P2443 and P2446 Case 4 Case 4 ASV stuck closed and P2441 and P2445 or P2443
2008 Toyota Tundra 2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra
|