D Range Test

ROAD TEST





Caution: Perform the test at normal ATF operating temperature (60-70°C, 140-158°F).

This step is performed to inspect for problems in the various ranges. If these tests show any problems, refer to the electronic system component or mechanical sections to adjust or replace.

RANGE TEST

Shift Point, Shift Pattern, and Shift Shock

1. Shift the selector lever to D range and select the Power mode.

Note: Throttle sensor voltage of the EC-AT Tester represents the throttle valve opening.
2. Accelerate the vehicle at half- and full Throttle.
3. Check that 1-2, 2-3 and 3-OD upshifts and downshifts and lockup are obtained. The shift points must be as shown in the D range (Power) shift diagram.

Note:
- Drum speed (rpm) of the EC-AT Tester represents the shift point.
- Vehicle speed of the EC-AT Tester and speedometer and vehicle speed on a chassis roller may not meet the specified shift pattern because of tire size. Therefore, check the shift points with the drum speed.
- There is no lockup when the coolant temperature is below 72°C (162°F).
- There is no lockup when the brake pedal is depressed.

4. Check the upshifts tor shift shock or slippage in the same manner.
5. While driving in OD, shift the selector lever to S range and verify that OD-3 downshift immediately occurs, then decelerate and verify that engine braking eftect is felt in only 3rd gear.









6. Select D range (Hold mode).
7. Accelerate the vehicle and check 23 upshift and downshift, no 1st and no OD is obtained, and that the 2-3 shift points are as shown in the D range (Hold) shift diagram.

Noise and Vibration
Drive the vehicle in OD (lockup), OD (no lockup), 3rd (Hold) and check for abnormal noise or vibration.

Note: Abnormal noise and vibration can also be caused by the torque converter, driveshaft, or differential. Therefore, checking of cause must be made with extreme care.

Kick-down
Drive the vehicle in OD, 3rd and 2nd gears and check that kickdown occurs for OD-3, OD-2, OD-1, 3-2, 3-1, 2-1, and the shift points are as shown in the shift diagram.