A140L Transaxle

ROAD TEST (A140L)

CAUTION: Perform the test at normal operating fluid temperature (122 - 176°F or 50 - 80°C).

1. D RANGE TEST



- Shift into the D range and hold the accelerator pedal constant at the full throttle valve opening position.

Check the following:
a. 1->2, 2->3 and 3->O/D up-shifts should take place, and shift points should conform to those shown in the automatic shift schedule.

EVALUATION
1. If there is no 1->2 up-shift:
- Governor valve is defective
- 1-2 shift valve is stuck

2. If there is no 2->3 up-shift:
- 2-3 shift valve is stuck

3. If there is no 3->O/D up-shift:
- 3-O/D shift valve is stuck
- O/D solenoid is defective

4. If the shift point is defective:
- Throttle cable is out-of-adjustment
- Throttle valve, 1-2 shift valve, 2-3 shift valve, 3-O/D shift valve etc., are defective

b. In the same manner, check the shock and slip at the 1->2, 2->3 and 3->O/D up-shifts.







EVALUATION
If the shock is excessive:
- Line pressure is too high
- Accumulator is defective
- Check ball is defective

c. Run at the D range lock-up or O/D gear and check for abnormal noise and vibration.

NOTE: The check for the cause of abnormal noise and vibration must be made with extreme care as it could also be due to loss of balance in the drive shaft, tire, torque converter, etc.




d. While running in the D range, 2nd, 3rd and O/D gears, check to see that the possible kick-down vehicle speed limits for 2->1, 3->2 and O/D->3 kick downs conform to those indicated on the automatic shift schedule.
e. Check for abnormal shock and slip at kick-down.




f. Check for the lock-up mechanism.
1. Drive in D range, O/D gear, at a steady speed (lock-up ON) of about 70 km/h (43 mph).
2. Lightly depress the accelerator pedal and check that the engine rpm does not change abruptly.
If there is a big jump in engine rpm, there is no lock-up.

2. 2 RANGE TEST



Shift into the 2 range and, while driving with the accelerator pedal held constantly at the full throttle valve opening position, check on the following points.

a. Check to see that the 1->2 up-shift takes place and that the shift point conforms to it shown on the automatic shift schedule.




b. While running in the 2 range and 2nd gear, release the accelerator pedal and check the engine braking effect.

EVALUATION
If there is no engine braking effect:
- Second coast brake is defective




c. Check for abnormal noise at acceleration and deceleration, and for shock at up-shift and downshift.

3. L RANGE TEST



a. While running in the L range, check to see that there is no up-shift to 2nd gear.




b. While running in the L range, release the accelerator pedal and check the engine braking effect.

EVALUATION
If there is no engine braking effect:
- First and reverse brake is defective




c. Check for abnormal noise during acceleration and deceleration.

4. R RANGE TEST



Shift into the R range and, while starting at full throttle, check for slipping.

5. P RANGE TEST



Stop the vehicle on a gradient (more than 5°) and after shifting into the P range, release the parking brake.
Then check to see that the parking lock pawl holds the vehicle in place.