Road Test
ROAD TESTCAUTION: Perform this test with fluid at normal operating temperature (50 - 80°C or 122 - 176°F).
1. "D" RANGE TEST
Shift into "D" range and while driving with the accelerator pedal held constant at a specified point (throttle valve opening 50% and 100%), check on the following points:
Automatic Shift Diagram - 2WD Wagon:
Automatic Shift Diagram - 4WD Wagon:
a. At each of the above throttle openings, check to see that 1 - 2 and 2 - 3 up-shift take place and that the shift points conform to those shown in the automatic shift diagram.
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 the shift point is defective:
- Throttle link is out-of-adjustment
- Throttle valve, 1 -> 2 shift valve, 2 -> 3 shift valve etc., are defective.
b. In the same manner, check the shock and the slip at 1 -> 2 and 2 -> 3 up-shifts.
EVALUATION
If the shock is severe,
- Line pressure is too high
- Accumulator is defective
- Check ball is defective
c. In "D" range 3rd gear and check for abnormal noise and vibration.
NOTE: Check for cause of abnormal noise and vibration must be made with extreme care as they could also be due to unbalance in the differential, tires, torque converter, etc. or insufficient bending rigidity, etc., in the power train.
d. While running in "D" range 2nd and 3rd gears check to see that the possible kick-down vehicle speed limits for 2 -> 1, 3 -> 1 and 3 -> 2 kick-downs conform to those indicated in the automatic shift diagram.
e. Check for abnormal shock and slip at kick-down.
f. While running in "D" range 3rd gear shift to "2" and "L" ranges and check the engine braking effect in each of these ranges.
EVALUATION
1. If there is no engine braking effect in "2" range,
- Brake No.1 is defective
2. If there is no engine braking effect in "L" range,
- Brake No.3 is defective
g. While running in "D" range, release your foot from the accelerator pedal and shift into "L" range. Then check to see if the 3 2 and 2 1 down-shift points conform to those indicated in the automatic shift diagram.
2. "2" RANGE TEST
a. Shift to "2" range and run with the throttle valve opening at 50% and 100% respectively. Then check the 12 up-shift points at each of the throttle valve openings to see that it conforms to those indicated in the automatic shift diagram.
b. While running in "2" range, 2nd gear, release the accelerator pedal and check the engine braking effect.
c. Perform a kick-down from the "2" range and check the possible 2 -> 1 kick-down vehicle speed limit to see if it conforms to that indicated in the automatic shift diagram.
d. Check for abnormal noise at acceleration and deceleration, and for shock at up-shift and down-shift.
3. "1" RANGE TEST
a. While running in "L" range, check to see that there is no up-shift to 2nd gear.
b. While running in "L" range, release the accelerator pedal and check the engine braking effect.
c. Check for abnormal noise at acceleration and deceleration.
4. "R" RANGE TEST
Shift into "R" range and, while running at full throttle, check for slipping.
5. "P" RANGE TEST
Stop the vehicle on a gradient (more than 9%) and, after shifting into "P" range, release the parking brake. Then check that the parking lock pawl prevents the vehicle from moving.
6. INSPECT 4WD CHANGE-OVER OPERATION
a. On a paved surface, drive in a circle with the steering wheel fully turned to either the right or left.
b. Place the 4WD change-over switch at ON, and check that the 4WD indicator lamp light and there is a slight drop as if the brakes were applied.
c. Place the change-over switch at OFF and drive in a straight line. Check that there is a slight shock sensation during change-over to front-wheel drive.
NOTE: During acceleration, etc. when there is a drive force applied to the drive axles, there will be no immediate change-over to front-wheel drive even when the switch is placed at OFF.