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Home >> Lexus >> 2000 >> SC 300 >> Repair and Diagnosis >> General Information >> OBD-II Drive Cycles >> OBD Monitor Drive Patterns >> Purpose of the Readiness Tests >> 4. Catalyst Monitor (A/F Sensor Equipped) >> Drive Pattern
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Drive Pattern

  1. Connect the OBD II scan tool to the DLC3 to check monitor status and preconditions.
  2. Drive vehicle at 40 - 55 mph (64 - 88 km/h) for approximately 4 minutes.
    NOTE: Drive with smooth throttle operation and avoid sudden acceleration.
    If IAT is less than 50°F (10°C) when starting engine, continue to drive vehicle at 40 - 55 mph (64 - 88 km/h) for approximately 4 minutes.
  3. Drive vehicle allowing speed to fluctuate between 35 - 45 mph (56 - 72 km/h) for about 16 minutes.
    NOTE: Drive with smooth throttle operation and avoid sudden deceleration as much as possible (avoid sudden, full closure of the throttle).
  4. If readiness status does not switch to complete, ensure preconditions are met, turn ignition off, and then repeat steps "b" through "c".
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