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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 P2446 Case 2 Case 6 ASV stuck open and air pump stuck OFF P2440 and P2445 or P2442 and P2447 Case 3 Case 7 ASV stuck closed and air pump stuck ON P2441 and P2444 or P2443 and P2446 Case 4 Case 8 ASV stuck closed and air pump stuck OFF P2441 and P2445 or P2443 and P2447 HINT: If the vacuum hose between the ASV and the pressure sensor is not connected correctly, case 4 may *: The No. 1 cylinder is the cylinder which is farthest from the transmission. Bank 2 refers to the bank that does not include the No. 1 cylinder. System Check: The pressure in the secondary air passage can be checked using the Techstream. Start the engine and warm it up. a. Turn the ignition switch off. b. Connect the Techstream to the DLC3. c. Turn the ignition switch to ON and turn the Techstream on. d. Enter the following menus: Powertrain / Engine and ECT / Utility / Secondary Air Injection Check / Manual Mode / AIR PUMP 1: ON, ASV1: OPEN, AIR PUMP 2: ON, ASV2: OPEN and AIR PUMP 1: OFF, ASV1 CLOSE, AIR PUMP 2: OFF, ASV2 CLOSE. HINT: When Manual Mode is selected, the Techstream initialization (atmospheric pressure measurement) is performed automatically. The initialization takes 10 seconds. After e. Start the engine. f. Perform the AIR system intrusive operation while the engine is idling. g. Check that the air pump (AIR PUMP), ASV and pressure in the AIR system passage (PRESSURE) displayed on the Techstream indicate the conditions shown in the table below. Standard: h. 3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2444-P244... |