Road Test

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

1. D RANGE TEST IN NORM, AND PWR PATTERN RANGES
Shift into the D range and hold the accelerator pedal constant at the 50% and 100% throttle valve opening positions.
Push in one of the pattern selector buttons and check the following:




a. 1->2, 2->3 and 3->OD, up-shifts should take place, and shift points should conform to those shown in the automatic shift diagram.

NOTE:
- There is no OD up-shift or lock-up when the coolant temp. is below 60°C (140°F) and speed is under 60 km/h (37 mph), or if there is a 10 km/h (6 mph) difference between the set cruise control speed.
- There is no 3rd up-shift or lock-up when coolant temp. is below 35°C (95°F) and speed is under 40 km/h (25 mph).

EVALUATION
1. If there is no 1->2 up-shift:
- No.2 solenoid is stuck
- 1-2 shift valve is stuck

2. If there is no 2->3 up shift:
- No. 1 solenoid is stuck
- 2-3 shift valve is stuck

3. If there is no 3->OD up-shift (throttle valve opening 50%):
- 3-OD shift valve is stuck

4. If the shift point is defective:
- Throttle valve, 1-2 shift valve, 2-3 shift valve, 3-OD shift valve etc., are defective.

5. If the lock-up is defective:
- No.3 solenoid is stuck
- Lock-up relay valve is stuck




b. In the same manner, check the shock and slip at the 1->2, 2->3 and 3->0D 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 OD 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 propeller shaft, differential, torque converter, etc. or insufficient bending, rigidity, etc. in the power train.




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




f. While running in the D range, OD gear or lock-up, shift to the 2 and L ranges and check the engine braking effect at each of these ranges.

EVALUATION
1. If there is no engine braking effect in the 2 range:
- No. 1 brake is defective

2. If there is no engine braking effect in the L range:
- No.3 brake is defective

2. 2 RANGE TEST, WITH NORM AND PWR PATTERNS
Shift into the 2 range and, while driving with the accelerator pedal held constantly at the specified point (throttle valve opening 50% and 100%) push in one of the pattern selectors and check on the following points.




a. At each of the above throttle openings, check to see that the 1->2 up-shift takes place and that the shift points conform to those shown on the automatic shift diagram.

NOTE: There is no OD and no lock-up in the 2 range.




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




c. Check for 2->1 down-shift and abnormal noise at acceleration and deceleration, and for shock at up-shift and down-shift.

3. L RANGE TEST



a. While running above 80 km/h (50 mph) in the D range, release your foot from the accelerator pedal and shift into the L range. Then check to see that the 2->1 down shift occurs at the specified point shown on the automatic shift diagram.




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




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




d. 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.


AUTOMATIC SHIFT DIAGRAM

7M-GE














7M-GTE














NOTE:
1. There is no lock-up in the 2 and L ranges.
2. In the following cases, the lock-up will be released regardless of the lock-up pattern.
- When the throttle is completely closed.
- When the brake light switch is ON.