– Introduction General Information In–37 9. A/F Sensor and Heated Oxygen Sensor Monitor (Front A/F sensor and rear heated oxygen sen- sor equipped) 70 mph (112km/h) 3,200rpm or less 1,400 rpm or more Once Twice 10 times 40 mph (64 km/h) 25 mph (40 km/h) 900 rpm or more Idling IG SW off 2 min. or more 40 sec. 150 sec. or more 40 sec. 10 sec. 10 sec. 40 sec. 10 sec. A18914 Preconditions The monitor will not run unless: MIL is OFF Drive Pattern (a) Connect the OBD II scan tool to the DLC3 to check monitor status and preconditions. (b) Start the engine and allow to idle for 2 minutes or more. (c) Drive vehicle at 40 – 70 mph (64 – 112 km/h) or more for at least 150 seconds.
(d) Stop vehicle and allow engine to idle for 10 seconds or more. (e) Drive vehicle at 25 mph (40 km/h) or more for at least 40 seconds. (f) Stop vehicle and allow engine to idle for 10 seconds or more. (g) Perform steps ”e” and ”f” 10 times. (h) If readiness status does not switch to complete, ensure preconditions are met, turn ignition off and then repeat steps ”a” through ”g”. 1996–2003 ADDITION OF OBD (OTH021U) 37 Author : Date: