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Home >> Land Rover >> 1997 >> Defender 90 Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Drive Cycles >> Drive Cycle: "D"
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Drive Cycle: "D"

NOTE: The final phase of drive cycle "D" requires that a flat, straight route be chosen that allows a vehicle speed of 35 MPH to be maintained without stopping or excessive pedal pressure.
  1. After completing DTC and complaint repairs allow engine to cool. Install Land Rover TestBook or OBD-II scan tool. Turn ignition on for 30 seconds. Ensure Engine Coolant Temperature (ECT) sensor indicates less than 140°F (60°C).
  2. Start engine and allow to idle for 2 minutes. Perform 2 light accelerations from zero to 35 MPH using light pedal pressure and slow to a stop. Perform 2 medium accelerations from zero to 45 MPH using moderate pedal pressure and slow to a stop. Perform 2 hard accelerations from zero to 55 MPH using heavy pedal pressure. Increase speed to 60 MPH and continue for 5 minutes. Reduce speed to 50 MPH, continue for 5 minutes. Reduce speed to 35 MPH, continue for 5 minutes and slow to a stop.
  3. Allow engine to idle for 2 minutes. Check for DTCs using Land Rover TestBook or OBD-II scan tool. If any DTC is indicated, perform specified repairs. See DIAGNOSTIC TROUBLE CODE IDENTIFICATION  and appropriate DTC testing. If no DTCs are indicated, repair is complete.
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