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OBD-II Drive Cycle

NOTE: PCM must see a change of at least 72°F (35°C) in ECT from time engine is started until it reaches normal operating temperature of 158°F (70°C) before proceeding with drive modes of OBD-II drive cycle.
  1. Connect scan tool to Data Link Connector (DLC). Start and warm engine to normal operating temperature of 158°F (70°C). Operate engine at idle for 2 minutes.
    2. NOTE: Hold accelerator pedal very steady (53-60 MPH) during this step, otherwise test must be repeated.
  2. Accelerate vehicle at a steady rate (1/4-1/2 throttle) until vehicle reaches 55 MPH. Release accelerator pedal for at least 10 seconds. Allow vehicle speed to drop and then quickly depress accelerator to increase speed to 53-60 MPH. Drive vehicle at a steady speed of 53-60 MPH for 5 minutes.
  3. Stop vehicle.
    4. NOTE: Using scan tool, ensure TP sensor voltage remains between 0.8-1.2 volts during acceleration. Constant and slow acceleration is important when accelerating vehicle during this test.
  4. Accelerate vehicle at a steady rate until speed reaches 30-35 MPH. Drive at this speed for 20 seconds, then stop vehicle. Repeat steps 3)  and 4)  at least 3 times.
  5. Accelerate smoothly until vehicle speed reaches 50-55 MPH and drive at this speed for about 3 minutes.
  6. Stop vehicle and turn engine off for at least 5 seconds.
  7. Repeat steps 1)-6)  in order at least one more time. If a step is interrupted, repeat preceding step.
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