Road Test

ROAD TEST

1. PROBLEM SYMPTOM CONFIRMATION

a. Based on the result of the customer problem analysis, try to reproduce the symptoms. If the problem is that the transmission does not shift up, shift down, or the shift point is too high or too low, conduct the following road test referring to the automatic shift schedule and simulate the problem symptoms.

2. ROAD TEST

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

a. D position test (NORM and PWR pattern)
Move the shift lever to D and fully depress the accelerator pedal. Check the following:

1. Check up-shift operation.
Check that the 1->2, 2->3, 3->4 and 4->5 up-shifts take place at the shift point shown in the automatic shift schedule

HINT:
- 5th gear up-shift prohibition control is activated when: 1.coolant temperature is 55 °C (128 °F) or less, or 2.vehicle speed is 51 km/h (32 mph) or less.
- 5th gear lock-up prohibition control is activated when: 1.brake pedal is depressed, or 2.coolant temperature is 60 °C (140 °F) or less.

2. Check for shift shock and slip.
Check for shock and slip during 1->2, 2->3, 3->4 and 4->5 up-shifts.
3. Check for abnormal noises and vibrations.
Drive in D lock-up or 5th gear and check for abnormal noises and vibrations.

NOTE: If abnormal noises and/or vibrations occur, make a thorough inspection of the cause.Failure to repair the problem may lead to subsequent problems in the differential, torque converter, etc.

4. Check kick-down operation.
While driving the vehicle in 2nd, 3rd, 4th and 5th gears with the shift lever on D, check that the possible kick-down vehicle speed limits for 2->1, 3->2, 4->3 and 5->4 kick-downs conform to those indicated on the automatic shift schedule
5. Check for abnormal shock and slip at kick-down.
6. Check the lock-up mechanism.
Drive the vehicle in 5th gear with the shift lever on D. Maintain a steady speed (lock-up ON) of about 70 km/h (43 mph). Lightly depress the accelerator pedal and check that the engine speed does not change abruptly.

If the engine speed increases suddenly, lock-up is malfunctioning.

b. 4 position test Move the shift lever to 4 and fully depress the accelerator pedal. Check the following:

1. Check up-shift operation.
Check that the 1->2, 2->3 and 3->4 up-shifts take place at the shift points shown in the automatic shift schedule.

HINT: There is no 5th up-shift and lock-up when the shift lever is on 4.

2. Check engine braking.
While driving the vehicle in 4th gear with the shift lever on 4, 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. 3 position test
Move the shift lever to 3 and fully depress the accelerator pedal. Check the following:

1. Check up-shift operation
Check that the 1->2 and 2->3 up-shifts take place at the shift point shown in the automatic shift schedule
2. Check engine braking.
While driving the vehicle in 3rd gear with the shift lever on 3, 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.

d. 2 position test
Move the shift lever to 2 and fully depress the accelerator pedal. Check the following:

1. Check up-shift operation.
Check that the 1->2 up-shift takes place at the shift point shown in the automatic shift schedule
2. Check engine braking.
While driving the vehicle in 2nd gear with the shift lever on 2, 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.

e. L position test
Move the shift lever to L and fully depress the accelerator pedal. Check the following:

1. Check no up-shift.
While driving the vehicle with the shift lever on L, check that up-shift to 2nd gear does not occur.
2. Check engine braking.
While driving the vehicle with the shift lever on L, release the accelerator pedal and check that the engine braking effect.
3. Check for abnormal noises during acceleration and deceleration.

f. R position test
Move the shift lever to R and lightly depress the accelerator pedal. Check that the vehicle moves backward without any abnormal noises or vibrations.

CAUTION: Before conducting this test, ensure that no people or obstacles are in the test area.

g. P position test
Stop the vehicle on an incline (more than 5 °). Then move the shift lever to P and release the parking brake.Check that the parking lock pawl holds the vehicle in place.