Problem Symptom Confirmation Test (Road Test)

ROAD TEST

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

(a) D position test (NORM and PWR pattern):
Shift into the D position and fully depress the accelerator pedal and check the following points.
(1) Check upshift operation.
Check to see that 1 -> 2, 2 -> 3, 3 -> 4 and 4 -> 5 upshifts takes place, and that the shift points conform to the automatic shift schedule.

HINT:
- 5th Gear Upshift Prohibition Control (1. Coolant temp. is 60 °C (140 °F) or less. 2. If there is a 10 km/h (6 mph) difference between the set cruise control speed and vehicle speed.)
- 5th Gear Lock-up Prohibition Control (1. Brake pedal is depressed. 2. 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, 3 -> 4 and 4 -> 5 upshifts.
(3) Check for abnormal noises and vibration.
Drive in the D position lock-up or 5th 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, torque converter clutch, etc.

(4) Check kickdown operation.
While running in the D position, 2nd, 3rd, 4th and 5th gears, check to see that the possible kick-down vehicle speed limits for 2 -> 1, 3 -> 2, 4 -> 3 and 5 -> 4 kick-downs conform to those indicated in the automatic shift schedule.
(5) Check abnormal shock and slip at kickdown.
(6) Check the lock-up mechanism.
- Drive in D position 5th gear, at a steady speed (lock-up ON) of about 65 km/h (40 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) 4 position test:
Shift into the 4 position and fully depress the accelerator pedal and check the following points.
(1) Check upshift operation.
Check to see that the 1->4 upshift takes place and that the shift point conforms to the automatic shift schedule.

HINT: There is no 5th upshift in the 4 position.

(2) Check engine braking.
While driving in the 4 position and 4th gear, release the accelerator pedal and check the engine braking effect.
(3) Check for abnormal noises during acceleration and deceleration, and for shock at upshift and down-shift.
(c) 3 position test:
Shift into the 3 position and fully depress the accelerator pedal and check the following points.
(1) Check upshift operation.
Check to see that the 1 -> 3 upshift takes place and that the shift point conforms to the automatic shift schedule.
(2) Check engine braking.
While running in the 3 position and 3rd gear, release the accelerator pedal and check the engine braking effect.
(3) Check for abnormal noises during acceleration and deceleration, arid for shock at upshift and down-shift.
(d) 2 position test:
Shift into the 2 position and fully depress the accelerator pedal and check the following points.
(1) Check upshift operation.
Check to see that the 1 -> 2 upshift takes place and that the shift point conforms to the automatic shift schedule.
(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, arid for shock at upshift and down-shift.
(e) L position test:
Shift into the L position and fully depress the accelerator pedal and check the following points.
(1) Check no upshift.
While running in the L position, check that there is no upshift 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.
(f) 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.

(g) P position test:
Stop the vehicle on a grade (more than 50) 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.