Problem Symptom Confirmation (Road Test)

ROAD TEST

NOTE: Perform the test at normal operating ATF temperature 50 - 80°C (122 - 176°F).

a. D position test:
Shift into the D position and fully depress the accelerator pedal and check the following points.
1. Check up-shift operation.
1 -> 2, 2 -> 3 and 3 -> O/D up-shift takes place at the shift point shown in the automatic shift schedule.

HINT:
O/D Gear Up-shift Prohibition Control
- Coolant temp. is 60°C (140°F) or less.
- If there is a 10 kph (6 mph) difference between the set cruise control speed and vehicle speed.
O/D Gear Lock-up Prohibition Control
- Brake pedal is depressed.
- Coolant temp. is 60°C (140°F) or less.

2. Check for shift shock and slip.
Check for shock and slip at the 1 -> 2, 2 -> 3 and 3 -> O/D up-shifts.
3. Check for abnormal noises and vibration.
Run at the D position lock-up or O/D gear and check for abnormal noises and vibration.

HINT: The check for the cause of abnormal noises and vibration must be done very thoroughly as it could also be due to loss of balance in the differential or torque converter clutch, etc.

4. Check kick-down operation.
While running in the D position, 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.
5. Check abnormal shock and slip at kick-down.
6. Check the lock-up mechanism.
- Drive in D position, O/D gear, at a steady speed (lock-up ON) of about 70 kph (43 mph).
- Lightly depress the accelerator pedal and check that the engine speed does not change abruptly.
If there is a big jump in engine speed, there is no lock-up.

b. 2 position test:
Shift into the 2 position and fully depress the accelerator pedal and check the following points.

1. Check up-shift operation.
Check to see that the 1 -> 2 up-shift takes place and that the shift point conforms to the automatic shift schedule.

HINT: There is no O/D up-shift and lock-up in the 2 position.

2. Check engine braking.
While running in the 2 position and 2nd gear, release the accelerator pedal and check the engine braking effect.
3. Check for abnormal noises during acceleration and deceleration, and for shock at up-shift and down-shift.

c. L position test:
Shift into the 2 position and fully depress the accelerator pedal and check the following points.
1. Check no up-shift.
While running in the L position, check that there is no up-shift to 2nd gear.
2. Check engine braking.
While running in the L position, release the accelerator pedal and check the engine braking effect.
3. Check for abnormal noises during acceleration and deceleration.

d. R position test:
Shift into the R position and fully depress the accelerator pedal and check for slipping.

CAUTION: Before conducting this test, ensure that the test area is free from people and obstruction.

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