LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Mercury >> 2001 >> Villager Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Quick Test >> Drive Cycles >> OBD-II Drive Cycle
April 5, 2026: LEMON Manuals is launched! Read the announcement.

OBD-II Drive Cycle

NOTE: DTC will set when a fault is present in the system. Not all DTCs will illuminate MIL. Anytime a DTC is set or a repair is made and DTCs are cleared from PCM memory, the I/M ready monitors will reset to NO. To reset I/M monitors to a ready status, OBD-II drive cycle must be performed. Go to step  1.
NOTE: PCM must see a change of at least 72°F (35°C) in ECT from the 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. 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 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 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, the 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)  at least one more time. If a step is interrupted, repeat the preceding step.

Drive cycle pattern "C" monitors catalyst and other components. Using New Generation Star (NGS) tester or generic OBD-II scan tool, monitor TP PID. Steadily accelerate to 30-35 MPH. Ensure TP voltage is .8-1.2 volts throughout acceleration portion of test. Maintain 30-35 MPH for 20 seconds. Repeat 3 times. Accelerate smoothly to 50-55 MPH. Maintain this speed for 3 minutes. If a step is interrupted repeat preceding step.

scientia non olet · About LEMON Manuals