PROBLEM SYMPTOM CONFIRMATION
Based on the result of the customer problem analysis, try to reproduce the symptoms. If the problem is that the transaxle does not shift up, shift down, or that the shift point is too high or too low, conduct the following road test referring to the automatic shift schedule and try to reproduce the problem symptoms.
ROAD TEST
Note
Perform the test with the ATF at the normal operating ATF temperature of 50 to 80°C (122 to 176°F).
D position test
Move the shift lever to D, fully depress the accelerator pedal and check the following points.
Check the 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 Click here.
Tech Tips
4th Gear Up-shift Prohibition Control
The engine coolant temperature is 47°C (117°F) or less and the vehicle speed is 70 km/h (43 mph) or less.
The ATF temperature is 10°C (50°F) or less.
4th Gear Lock-up Prohibition Control
The brake pedal is depressed.
The accelerator pedal is released.
The engine coolant temperature is 60°C (140°F) or less.
Check for shift shock and slip.
Check for shock and slip at the 1 → 2, 2 → 3 and 3 → 4 up-shifts.
Check for abnormal noise and vibration.
Check for abnormal noise and vibration when up-shifting from 1 → 2, 2 → 3 and 3 → 4 while driving with the shift lever in D, and check while driving in the lock-up condition.
Tech Tips
The check for the cause of abnormal noise and vibration must be performed thoroughly as it could also be due to loss of balance in the differential, torque converter clutch, etc.
Check the kick-down operation.
While driving the vehicle in 2nd, 3rd and 4th gear with the shift lever in D, check that the possible kick-down vehicle speed limits for the 2 → 1, 3 → 2 and 4 → 3 kick-downs conform to those indicated in the automatic shift schedule Click here.
Check for abnormal shock and slip at kick-down.
Check the lock-up mechanism.
Drive the vehicle in 4th gear with the shift lever in D. Maintain a steady speed (lock-up ON).
Lightly depress the accelerator pedal and check that the engine speed does not change abruptly.
Tech Tips
There is no lock-up function in 1st and 2nd gear.
If there is a sudden increase in engine speed, there is no lock-up.
S position test
Move the shift lever to S, depress the accelerator pedal, and check the following points.
Check the shift operation.
While driving the vehicle in 4th gear with the shift lever in D, move the shift lever to S and return it to D. Check that the 4 → 3 down-shift and 3 → 4 up-shift can be performed.
With the shift lever in S (while the vehicle is stopped), move the shift lever to "+" and check that the shift position on the combination meter changes as follows: 1 → 2, 2 → 3 and 3 → 4.
While driving the vehicle in 3rd gear with the S3 range selected (at a vehicle speed of approximately 30 to 40 km/h (19 to 25 mph)), move the shift lever to "-" and check that the 2nd gear down-shift occurs and the engine brake operates properly.
While driving the vehicle in 2nd gear with the S2 range selected (at a vehicle speed of approximately 20 to 30 km/h (12 to 19 mph)), move the shift lever to "-" and check that the 1st gear down-shift occurs and the engine brake operates properly.
Tech Tips
Manual shift (S position) is prohibited under either of the following conditions:
Down-shifting that causes engine overrun.
The driver repeatedly down-shifts (downshifting to 1st gear may not be performed).
R position test
Move the shift lever to R and lightly depress the accelerator pedal. Check that the vehicle moves backward without any abnormal noise or vibration.
CAUTION:
Before conducting this test, ensure that no people or obstacles are in the test area.
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.