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Home >> Toyota >> 2003 >> MR2 C56 >> Repair and Diagnosis >> External Pages >> Different car >> Section 55 (Automatic Transmission Diagnosis - U140E & U140F) >> Performance Tests >> Road Test >> "D" Position

"D" Position

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2002 Toyota RAV4, 2002 Toyota Highlander, 2002 Toyota Camry, 2002 Lexus RX 300, and 2001 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
  1. Place selector lever in "D" position. Hold accelerator pedal constant at full throttle. Check 1-2, 2-3, and 3-4 upshift and lock-up points. See appropriate table under SHIFT SPEED SPECIFICATIONS .
    NOTE: There is no overdrive lock-up when coolant temperature is less than 140°F (60°C) or when vehicle speed is 6 MPH less than the set cruise control speed. There is no lock-up when brake pedal is depressed.
    • If no 1-2 upshift occurs, check lower valve body control valves or shift solenoid.
    • If no 2-3 upshift occurs, check lower valve body control valves or shift solenoid.
    • If no 3-4 upshift occurs, check 3-4 shift valve or shift solenoid.
    • If all shift points are incorrect, check upper valve body, lower valve body control valves and 3-4 shift valve.
    • If all lock-up points are incorrect, check lock-up relay valve or shift solenoid.
  2. Use procedure outlined in step 1)  to check for shock and slip between 1-2, 2-3, and 3-4 upshifts. If shock is harsh, line pressure may be too high. Check accumulator or check ball.
  3. Drive vehicle in "D" position lock-up or overdrive gear. Check for abnormal noise and vibration.
    NOTE: Check for cause of abnormal noise and vibration must be made with extreme care as problem could be due to an unbalanced axle shaft, differential, tire, torque converter, etc.
  4. While driving in "D" position, confirm correct kickdown vehicle speed limits for 2-1, 3-2, 4-3 shift points. Check for abnormal shock and slip at kickdown.
  5. Check lock-up function. Drive vehicle in overdrive in "D" position with lock-up on. Hold vehicle speed steady at 37 MPH. Lightly depress accelerator pedal. Ensure engine RPM does not change abruptly. Large increase in engine RPM indicates lock-up function is faulty.
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