Table Cb iDisplay groups 31 and 33 Display Group Sensor Bank 1, Sensor 1 Bank 1, Sensor 2 Bank 2, Sensor 1 Bank 2, Sensor 2 31 Linear oxygen sensors Lambda actual value Lambda specified value 33 Linear oxygen sensor control value Control value (Sensor voltage before CAT of a broadband sensor (V) Control value (Sensor voltage before CAT of a broadband sensor (V)
165 Fuel Control Learning Adaptation Values Late Model Oxygen Sensor Reading C.5.2 Oxygen Sensor Control-Dwell Time Test Below is atypical display group example, DIAGN O CONTROL SYSTEM. • ENGINE LOAD(%) • O2 SENSOR(BANK 1, AFTER CAT)(V) • CORR.BETW O2-SNS 1+2 BK1(ms) • DIAGNOSE STATUS These parameters indicate the relationship of the before CAT OS and the after CAT OS. The after CAT OS has the authority to override the before the CAT OS. The reason for this is in case the before CAT OS performance deteriorates to the point of jeopardizing the CAT, the after CATO control can takeover control preventing possible CAT damage. The after CAT OS also can correct for slight changes in the mixture if it detects displacement of the before CAT voltage curve. It takes control by holding the before CATO control at its higher or lower point fora specific time dwell time. If this time is in the positive range (i.e., 50 ms, then the mixture is shifted to the rich direction. If the time is negative (i.e., -50 ms, then the mixture is shifted to the lean direction. NOTE: i If the value is above +200 ms, then there is a possible leak in the exhaust system.