Road Test

ROAD TEST:

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

1. D POSITION TEST IN NORM AND PWR PATTERN POSITIONS.

- Shift into the D position and hold the accelerator pedal constant at the full throttle valve opening position.
- Check the following:

(A) Shift points and lock-up points.

- 1 -> 2, 2 -> 3 and 3 -> O/D up-shifts should take place, and shift points should conform to those shown in the Shift Point Schedule below.

Shift Point Schedule:

Lock-up Point Schedule:

HINT:
- There is no O/D up-shift and lock-up when the engine coolant temp. is below 53°C (127°F).
- When the engine coolant temp. is below 6O°C (140°F), the shift point is lower than specified in the Shift Point Schedule.

EVALUATION:

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

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

- If there is no 3 -> O/D up-shift:
- 3-4 shift valve is stuck

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

- If the lock-up is defective:
- Lock-up 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 -> O/D 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 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 made with extreme care as it could also be due to loss of balance in the drive shaft, tires, torque converter clutch, etc.

(D) 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 Shift Point Schedule.

(E) Check for abnormal shock and slip at kick-down.

(F) Check for the lock-up mechanism.

- Drive in D position, O/D gear, at a steady speed (lock-up ON) of about 64 - 71 km/h (40 - 44 mph).
- Lightly depress the accelerator pedal and check that the engine RPM does not change abruptly.

- If there is a big jump in engine RPM, there is no lockup.

2. 2 POSITION TEST.

Shift into the 2 position and, while driving with the accelerator pedal held constantly at the full throttle valve opening position, push in one of the pattern selectors and check on the following points.

(A) Check to see that the 1 -> 2 up-shift takes place and that the shift point conforms to it shown on the Shift Point Schedule. (see step 1/(A))

HINT:
- To prevent overrun. the transaxle shifts up into 3rd gear at around 109 km/h (68 mph).
- In position 2, there will be no lock-up to 2nd gear.

(B) While running in the 2 position and 2nd gear, release the accelerator pedal and check the engine braking effect.

EVALUATION:
- If there is no engine braking effect:
- Second coast brake is defective

(C) Check for abnormal noises during acceleration and deceleration, and for shock at up-shift and downshift.

3. L POSITION TEST.

(A) While running in the L position, check to see that there is no up-shift to 2nd gear.
HINT: To prevent overrun, the transaxle up-shifts into 2nd gear at around 59 km/h (37 mph).

(B) While running in the L position, release the accelerator pedal and check the engine braking effect.

EVALUATION :
- If there is no engine braking effect first and reverse brake is defective

- Shift into R position and, while starting at full throttle, check for slipping.

CAUTION: Before conducting this test ensure that the test area is free from personnel and obstructions.

5. P POSITION TEST.

- Stop the vehicle on a gradient (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.