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HOMESERVICE MANUALSFORD1997EXPLORER 4D UTILITY, 4.0 E, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 5 (ENGINE CONTROLS - TESTS W/CODES - 5.0L)DRIVE CYCLESEVAP RUNNING LOSS MONITOR SYSTEM REPAIR VERIFICATION DRIVE CYCLE
1997 Ford Explorer 4D Utility, 4.0 E, 4WD

EVAP Running Loss Monitor System Repair Verification Drive Cycle

1997 Ford Explorer 4D Utility, 4.0 E, 4WDSECTION EVAP Running Loss Monitor System Repair Verification Drive Cycle
WARNING: This page is about a different variant/trim than selected.
  1. Perform the preparation for OBD II drive cycle section. See VEHICLE PREPARATION FOR OBD-II OR MONITOR REPAIR VERIFICATION DRIVE CYCLE  under DRIVE CYCLES.
  2. With the scan tool, verify the FTP V PID reads between 2.4 and 2.8 volts with the gas cap removed. Reinstall gas cap.
  3. With the scan tool, view the OBD II monitors through the ON-BOARD SYSTEM READINESS menu.
  4. Drive the vehicle at a constant speed between 35 MPH (56 km/hr) and 65 MPH (104 km/hr) with throttle as steady as possible. Observe the HO2S monitor on the scan tool until it completes, or refer to FUEL MONITOR OR HO2S MONITOR REPAIR VERIFICATION DRIVE CYCLE .
  5. Bring the vehicle to a stop and access the following PIDs with the scan tool:
    • IAT, FLI, FTP, V, EVAPPDC, EVAPCV.
  6. Verify the following EVAP monitor entry condition:
    • IAT between 50-100°F (10-38°C).
  7. Drive the vehicle on the highway with a constant speed over 64 km/hr (40 MPH) with throttle as steady as possible. During this time, verify the following additional EVAP monitor entry conditions using the FLI and FTPV PIDs:
    • FLI stable +/- 5% between the limits of 15% and 85% tank fill.
    • FTP V stable within +/-0.1 volt.
  8. Prior to running the EVAP monitor, when the EVAPPDC PID is less than 75%, the canister vent solenoid is open and the system is unsealed. To initiate the EVAP monitor, the EVAPPDC PID must increase to at least 75%. At this time, the EVAPCV PID will then display 100% (canister vent solenoid closed to seal the system and the monitor will begin to run. Continue to drive at steady throttle with light steering until the EVAPCV PID displays 0% (canister vent solenoid open, system unsealed). If this step does not occur as described, proceed to the following note, otherwise proceed to next step.
    NOTE: During the drive cycle or hot ambient temperatures, fuel vapor (from the canister and/or tank) may keep the test from starting. The following be observed on the scan tool when either:
    • The EVAPPDC PID never reaches 75% with stable FLI and FTP PID readings.
    • The EVAPCV PID never goes to 100% (canister vent never closes) when the EVAPPDC PID is above the 75% minimum to start the test.
  9. Bring vehicle to a stop.
  10. With the scan tool, view the EVAP monitor for completion through the On-Board System Readiness Menu. Repeat  7 if the EVAP monitor is not complete.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.